Satellite Peak Intensity Research Articles

Assessing Sb Cross Incorporation in InAs/InAsSb Superlattices

We developed an x-ray diffraction (XRD) method that uses relative satellite peak intensities to assess the width of the alloy interfaces in InAs/InAsSb Type 2 superlattices (T2SLs). Specifically, our method simulates XRD patterns for T2SLs based on a model of alloy cross-incorporation and fits the simulated pattern to experimental data through a small set of model parameters. We model the Sb distribution function with two forms (i) a Gaussian function, or (ii) two error functions. We compared the model with experimental data extracted from the literature. The first example is a T2SL with 50 periods of 7.0 nm thick InAs and 2.3 nm thick InAs1-xSbx with the targeted alloy composition of x = 0.23. The second example is a T2SL with 100 periods of 4.6 nm thick InAs and 1.7 nm thick InAs1-xSbx with the targeted composition of x = 33.3%. The width of the alloy interface is about 2.54 nm for the first example with the Gaussian model, and with the error function model is 2.8 nm. In the second example, we observed a lower width of the alloy interface of about 0.48 nm with the Gaussian model, and 0.5 nm with the error function model.

Spectroscopic evidence for the Fe3+ spin transition in iron-bearing δ-AlOOH at high pressure

Abstractδ-AlOOH has emerged as a promising candidate for water storage in the lower mantle and could have delivered water into the bottom of the mantle. To date, it still remains unclear how the presence of iron affects its elastic, rheological, vibrational, and transport properties, especially across the spin crossover. Here, we conducted high-pressure X-ray emission spectroscopy experiments on a δ-(Al0.85Fe0.15) OOH sample up to 53 GPa using silicone oil as the pressure transmitting medium in a diamond-anvil cell. We also carried out laser Raman measurements on δ-(Al0.85Fe0.15)OOH and δ-(Al0.52Fe0.48)OOH up to 57 and 62 GPa, respectively, using neon as the pressure-transmitting medium. Evolution of Raman spectra of δ-(Al0.85Fe0.15)OOH with pressure shows two new bands at 226 and 632 cm−1 at 6.0 GPa, in agreement with the transition from an ordered (P21nm) to a disordered hydrogen bonding structure (Pnnm) for δ-AlOOH. Similarly, the two new Raman bands at 155 and 539 cm−1 appear in δ-(Al0.52Fe0.48)OOH between 8.5 and 15.8 GPa, indicating that the incorporation of 48 mol% FeOOH could postpone the order-disorder transition upon compression. On the other hand, the satellite peak (Kβ′) intensity of δ-(Al0.85Fe0.15)OOH starts to decrease at ~30 GPa and it disappears completely at 42 GPa. That is, δ-(Al0.85Fe0.15)OOH undergoes a gradual electronic spin-pairing transition at 30–42 GPa. Furthermore, the pressure dependence of Raman shifts of δ-(Al0.85Fe0.15)OOH discontinuously decreases at 32–37 GPa, suggesting that the improved hydrostaticity by the use of neon pressure medium could lead to a relatively narrow spin crossover. Notably, the pressure dependence of Raman shifts and optical color of δ-(Al0.52Fe0.48)OOH dramatically change at 41–45 GPa, suggesting that it probably undergoes a relatively sharp spin transition in the neon pressure medium. Together with literature data on the solid solutions between δ-AlOOH and ε-FeOOH, we found that the onset pressure of the spin transition in δ-(Al,Fe)OOH increases with increasing FeOOH content. These results shed new insights into the effects of iron on the structural evolution and vibrational properties of δ-AlOOH. The presence of FeOOH in δ-AlOOH can substantially influence its high-pressure behavior and stability at the deep mantle conditions and play an important role in the deep-water cycle.

Interface intermixing and interdiffusion characteristics in MOVPE grown spontaneous AlxGa1-xAs/GaAs (100) superlattice structures using high resolution X-ray diffraction

Thermal diffusion characteristics in naturally grown ultra-nanoscale superlattice structures have been studied. In absence of any suitable direct experimental tool due to the physical resolution limit, here we rely on the theoretical analysis of x-ray rocking curve simulations coupled with the diffusion equation to arrive at the diffusion characteristics across the interfaces of spontaneously grown AlxGa1-xAs/AlyGa1-yAs superlattice structures. The simulation approach presented here is a combination of a virtual interdiffusion code and a code on x-ray diffraction. We have obtained the variation in the actual diffusion coefficient as a function of time at different temperatures from the decay rates of the integrated satellite peak intensities. We have also found the diffusion coefficient to be highly nonlinear across the interface with time. The satellite decay equation could fit the experimental data taking the maximum Al composition alone at each time step. The pre exponential factor and the activation enthalpy values for interdiffusion are found out to be 0.17–0.25 cm2/s and 0.5–0.6 eV for Al diffusion whereas 0.01–0.11 cm2/s and 3.45–3.5 eV for Ga diffusion, respectively in the studied temperature range of 500 °C–700 °C. The interdiffusivity increases with temperature from 500 °C to 625 °C and decreases for further rise in temperature as the compositional contrast between the two layers decreases significantly at higher temperatures.

Oxidation-state analysis of ceria by X-ray photoelectron spectroscopy.

Three different methods to determine the oxide-phase concentration in mixed cerium oxide by hard X-ray photoelectron spectroscopy are applied and quantitatively compared. Synchrotron-based characterization of the O 1s region was used as a benchmark to introduce a method based on the weighted superposition of the Ce 3d spectra of the pure Ce(3+) and Ce(4+) phases, which was shown to lead to reliable and highly accurate determination of the mean oxidation state in mixed cerium oxides. The results obtained reveal a linear relation between the third distinct final state (u''') satellite peak intensity of the Ce(4+) phase and the Ce(4+) concentration by proper inclusion of Ce(3+)-related plasmon satellite peaks, which contradicts previous claims of nonlinear behavior. In contrast, quantitative conventional peak-fitting procedures were shown to be well suited for the Ce 2p region due to its relatively simple structure. Additional satellite features observed in the Ce 3d spectrum of CeO2 were proposed to originate from plasmon contributions.

A reactive magnetron sputtering route for attaining a controlled core-rim phase partitioning in Cu2O/CuO thin films with resistive switching potential

The achievement of a reproducible and controlled deposition of partitioned Cu2O/CuO thin films by techniques compatible with ULSI processing like reactive magnetron sputtering has been reported as an outstanding challenge in the literature. This phase partitioning underlies their performance as reversible resistive memory switching devices in advanced microelectronic applications of the future. They are currently fabricated by thermal oxidation and chemical methods. We have used a combination of an understanding from plasma chemistry, thermo-kinetics of ions, and rf power variation during deposition to successfully identify a processing window for preparing partitioned Cu2O/CuO films. The production of a core rich Cu2O and surface rich Cu2O/CuO mixture necessary for oxygen migration during resistive switching is confirmed by XRD peaks, Fourier transform infra red Cu (I)-O vibrational modes, XPS Cu 2P3/2 and O 1S peak fitting, and a comparison of satellite peak ratio's in Cu 2P3/2 fitted peaks. We are proposing based on the findings reported in this paper that an XPS satellite peak intensity(Is) to main peak intensity ratio (Im) ≤ 0.45 as an indicator of a core rich Cu2O and surface rich Cu2O/CuO formation in our prepared films. CuO is solely responsible for the satellite peaks. This is explained on the basis that plasma dissociation of oxygen will be limited to the predominant formation of Cu2O under certain plasma deposition conditions we have identified in this paper, which also results in a core-rim phase partitioning. The deposited films also followed a Volmer-Weber columnar growth mode, which could facilitate oxygen vacancy migration and conductive filaments at the columnar interfaces. This is further confirmed by optical transmittance and band-gap measurements using spectrophotometry. This development is expected to impact on the early adoption of copper oxide based resistive memory electronic switching devices in advanced electronic devices of the future. The relative abundance of copper is another major complementary driver for the interest in copper oxide films.

Spin state of iron in Fe3O4magnetite andh-Fe3O4

The high-pressure behavior of magnetite has been widely debated in the literature. Experimental measurements have found conflicting high-pressure transitions: a charge reordering in magnetite from inverse-spinel to normal-spinel [Pasternak et al., J. Phys. Chem. Solids 65, 1531 (2004); Rozenberg et al., Phys. Rev. B 75, 020102 (2007)], iron high-spin to intermediate-spin transition in magnetite [Ding et al., Phys. Rev. Lett. 100, 045508 (2008)], electron delocalization in magnetite [Baudelet et al., Phys. Rev. B 82, 140412 (2010); Glazyrin et al., Am. Mineral. 97, 128 (2012)], and a structural phase transition from magnetite to $h$-Fe${}_{3}$O${}_{4}$ [Dubrovinsky et al., J. Phys.: Condens. Matter 15, 7697 (2003); Fei et al., Am. Mineral. 84, 203 (1999); Haavik et al., Am. Mineral. 85, 514 (2000)]. We present ab initio calculations of iron's spin state in magnetite and $h$-Fe${}_{3}$O${}_{4}$, which help resolve the high-pressure debate. The results of the calculations find that iron remains high spin in both magnetite and $h$-Fe${}_{3}$O${}_{4}$; intermediate-spin iron is not stable. In addition, magnetite remains inverse-spinel but undergoes a phase transition to $h$-Fe${}_{3}$O${}_{4}$ near 10 GPa. Magnetite has a complex magnetic ordering, multiple valence states (Fe${}^{2+}$ and Fe${}^{3+}$), charge ordering, and different local Fe site environments, all of which were accounted for in the calculations. The lack of intermediate-spin iron in magnetite helps resolve the spin state of iron in perovskite, the major mineral in the lower mantle. In both magnetite and perovskite, x-ray emission spectroscopy (XES) measurements in the literature show a drop in satellite peak intensity by approximately half, which is interpreted as intermediate-spin iron. In both minerals, calculations give no indication of intermediate-spin iron and predict high-spin iron to be stable for defect-free crystals. The results question the interpretation of a nonzero drop in XES satellite peak intensities as intermediate-spin iron.

Room temperature redox reaction by oxide ion migration at carbon/Gd-doped CeO2 heterointerface probed by an in situ hard x-ray photoemission and soft x-ray absorption spectroscopies

In situ hard x-ray photoemission spectroscopy (HX-PES) and soft x-ray absorption spectroscopy (SX-XAS) have been employed to investigate a local redox reaction at the carbon/Gd-doped CeO2 (GDC) thin film heterointerface under applied dc bias. In HX-PES, Ce3d and O1s core levels show a parallel chemical shift as large as 3.2 eV, corresponding to the redox window where ionic conductivity is predominant. The window width is equal to the energy gap between donor and acceptor levels of the GDC electrolyte. The Ce M-edge SX-XAS spectra also show a considerable increase of Ce3+ satellite peak intensity, corresponding to electrochemical reduction by oxide ion migration. In addition to the reversible redox reaction, two distinct phenomena by the electrochemical transport of oxide ions are observed as an irreversible reduction of the entire oxide film by O2 evolution from the GDC film to the gas phase, as well as a vigorous precipitation of oxygen gas at the bottom electrode to lift off the GDC film. These in situ spectroscopic observations describe well the electrochemical polarization behavior of a metal/GDC/metal capacitor-like two-electrode cell at room temperature.

Structural changes in ab-plane of Zn doped Bi-2212 HTSC single crystals

Single crystals of undoped and 1% Zn-doped Bi-2212 are grown by self-flux slow cooling method under similar growth conditions. T c(Δ T c) are found to be 84 K (2 K) and 82 K (8 K) for undoped and doped samples respectively. Effect of Zn doping on structure and modulation is studied. Different change in the value of a- and b-axes are observed resulting in a transformation of structure from tetragonal to orthorhombic one. However, no effective change in modulation is there. Distortions are compared in c- and b-axes for undoped and doped samples. The asymmetry in position and intensity of satellite peaks has been discussed. The value of a in excess of b has been reported for the first time. These results are discussed in terms of valancy, coordinates and position of occupancy of Zn ions vis-à-vis those of Cu − ions in Cu–O plane of the structure.

Effect of phase formation on valence band photoemission and photoresonance study of Ti/Ni multilayers using synchrotron radiation

This paper presents investigation of Ti–Ni alloy phase formation and its effect on valence band (VB) photoemission and photoresonance study of as-deposited as well as annealed Ti/Ni multilayers (MLs) up to 600 °C using synchrotron radiation. For this purpose [Ti (50 Å)/Ni (50 Å)]X 10 ML structures were deposited by using electron-beam evaporation technique under ultra-high vacuum (UHV) conditions. Formation of different phases of Ti–Ni alloy due to annealing treatment has been confirmed by the X-ray diffraction (XRD) technique. The XRD pattern corresponding as-deposited ML sample shows crystalline nature of both Ti and Ni deposited layers, whereas 300 °C annealed ML sample show solid-state reaction (SSR) leading to amorphization and subsequent recrystallisation at higher temperatures of annealing (≥400 °C) with the formation of TiNi, TiNi 3 and Ti 2Ni alloy phases. The survey scans corresponding to 400, 500 and 600 °C annealed ML sample shows interdiffusion and intermixing of Ni atoms into Ti layers leading to chemical Ti–Ni alloys phase formation at interface. The corresponding recorded VB spectra using synchrotron radiation at 134 eV on as-deposited ML sample with successive sputtering shows alternately photoemission bands due to Ti 3d and Ni 3d, respectively, indicating there is no mixing of the consequent layers and any phase formation at the interface during deposition. However, ML samples annealed at higher temperatures of annealing, particularly at 400, 500 and 600 °C show a clear shift in Ni 3d band and its satellite peak position to higher BE side indicates Ti–Ni alloy phase formation. In addition to this, reduction of satellite peak intensity and Ni 3d density of states (DOS) near Fermi level is also observed due to Ti–Ni phase formation with higher annealing temperatures. The variable photon energy VB measurements on as-deposited and ML samples annealed at 400 °C confirms existence and BE position of observed Ni 3d satellite structure. The observed changes and modifications in the VB photoemission are discussed and interpreted in terms of structural changes at the interface due to annealing treatment.

Spin crossover in(Mg,Fe)O: A Mössbauer effect study with an alternative interpretation of x-ray emission spectroscopy data

Electronic spin-pairing transition of iron in magnesiow{umlt u}stite-(Mg,Fe)O has been recently studied with X-ray emission and M{umlt o}ssbauer spectroscopies under high pressures. While these studies reported a high-spin to low-spin transition of iron to occur at pressures above approximately 50 GPa, the width of the observed transition varies significantly. In particular, Kantor et al. reported that the transition in (Mg0.8,Fe0.2)O occurs over a pressure range of approximately 50 GPa in high-pressure M{umlt o}ssbauer measurements. To account for the discrepancy in the transition pressure, Kantor et al. reanalyzed the X-ray emission spectra by Lin et al. using a simple spectral decomposition method and claimed that X-ray emission measurements are also consistent with a spin crossover of iron at high pressures. Here we show that the proposed fitting method is inadequate to describe the X-ray emission spectrum of the low-spin FeS2 and would give an erroneous satellite peak (K{sub beta}') intensity, leading to an artificial high-spin component and, consequently, to invalid conclusions regarding the width of the pressure-induced transition in magnesiow{umlt u}stite. Furthermore, we compare Kantor's M{umlt o}ssbauer data with other recent high-pressure M{umlt o}ssbauer studies and show that the width of the transition can be simply explained by different experimental conditionsmore » (sample thickness, diameter, and hydrostaticity).« less

X-ray investigation of quantum well intermixing after postgrowth rapid thermal processing

In order to better understand interdiffusion in quantum well based optoelectronic AlxGa1−xAs/GaAs devices, we have performed rapid thermal processing on similar periodic superlattices (SLs) grown by solid source molecular beam epitaxy. The interdiffusion has been studied by x-ray diffraction measurements. The intermixing of the atoms at the barrier–well interfaces in the temperature range between 800°C and 950°C shifts the energy levels of the bound states and thus the photoluminescence wavelength of the structures. X-ray ω–2θ scans confirm Al–Ga interdiffusion at the barrier–well interfaces and are quantitatively investigated by fitting the envelope function of the SL satellites. A fit to the data yields diffusion lengths in the range 0.2–2.7 nm. Diffusion coefficients and activation energies can be derived from the temperature dependence of diffusion lengths. In the samples that exhibit rougher interfaces, the early stages of interdiffusion at up to 800°C for 1 min show the narrowing and increasing of satellite peak intensities followed by their broadening and decrease of peak maxima at higher temperatures above 850°C. The observation correlates with the initial smoothing of the interfaces

Dilution effects on X-ray photoelectron spectra of La0.8Sr0.2MnO3 with SiO2

Diluted samples of La0.8Sr0.2MnO3 with SiO2 were prepared by calcination of the MCM-41 molecular sieve soaked in precursor solutions with various concentrations (0.1, 0.05 and 0.005 mol/l). The diluted samples from the 0.1, 0.05 and 0.005 mol/l solutions showed ferromagnetic behavior in temperature dependent magnetic susceptibility below ≈300, ≈250 and ≈100 K, respectively. The electron binding energy of the La 3d5/2 main peak of the diluted samples from the 0.1, 0.05 and 0.005 mol/l solutions were 835.7, 836.0 and 837.4 eV, respectively, and were larger than that of La0.8Sr0.2MnO3 bulk sample (834.2 eV). Reduction in intensity of the La 3d charge-transfer satellite was more pronounced for more diluted sample. The Mn 2p3/2 main peak of all the diluted samples remained at 642.2 eV, which is larger by 0.6 eV than that of the bulk sample (641.6 eV). The charge-transfer peak energy in the optical absorption spectra was the same (2.3 eV) for all the diluted samples, and the energy was larger by 0.4 eV than the bulk one (1.9 eV). The dilution caused localization of charge carriers within the La0.8Sr0.2MnO3 lattices isolated by the insulator. Suppression of charge flow between the isolated La0.8Sr0.2MnO3 lattices resulted in the enlargement of the La 3d electron binding energy and the decrease of the La 3d charge-transfer satellite peak intensity, and also the lowering of the ferromagnetic ordering temperature. © Springer Science + Business Media, Inc.

Dilution effects on X-ray photoelectron spectra of La0.8Sr0.2MnO3 with SiO2

Diluted samples of La0.8Sr0.2MnO3 with SiO2 were prepared by calcination of the MCM-41 molecular sieve soaked in precursor solutions with various concentrations (0.1, 0.05 and 0.005 mol/l). The diluted samples from the 0.1, 0.05 and 0.005 mol/l solutions showed ferromagnetic behavior in temperature dependent magnetic susceptibility below ≈300, ≈250 and ≈100 K, respectively. The electron binding energy of the La 3d5/2 main peak of the diluted samples from the 0.1, 0.05 and 0.005 mol/l solutions were 835.7, 836.0 and 837.4 eV, respectively, and were larger than that of La0.8Sr0.2MnO3 bulk sample (834.2 eV). Reduction in intensity of the La 3d charge-transfer satellite was more pronounced for more diluted sample. The Mn 2p3/2 main peak of all the diluted samples remained at 642.2 eV, which is larger by 0.6 eV than that of the bulk sample (641.6 eV). The charge-transfer peak energy in the optical absorption spectra was the same (2.3 eV) for all the diluted samples, and the energy was larger by 0.4 eV than the bulk one (1.9 eV). The dilution caused localization of charge carriers within the La0.8Sr0.2MnO3 lattices isolated by the insulator. Suppression of charge flow between the isolated La0.8Sr0.2MnO3 lattices resulted in the enlargement of the La 3d electron binding energy and the decrease of the La 3d charge-transfer satellite peak intensity, and also the lowering of the ferromagnetic ordering temperature. © Springer Science + Business Media, Inc.

Exotic Properties of CeSb Studied by X-ray Diffraction

Various properties of the strongly correlated electron system CeSb at ambient pressure as well as under high pressures have been investigated employing X-ray as a probe. The satellite peaks caused by the lattice modulation of CeSb in its AFP3 phase at ambient pressure have been analyzed successfully. The satellite peak intensity pattern was explained based on a model considering different effective ionic sizes and the scattering form factors for Γ 7 and Γ 8 -like Ce 3+ ions which appear in the ordered phase. The wave function for the Γ 8 -like Ce ion with larger moment was found almost the same as that of J z =5/2, which is consistent with the neutron diffraction experiment. At high pressures above about 1.9 GPa, rapid decrease of lattice constant was found below a certain critical temperature T L , below which a sudden increase of electrical resistivity appears. This phenomenon can be explained by the formation of magnetic polaron state below this temperature.

New technique to measure the polarization dependence of non-resonant X-ray magnetic scattering

A new technique to measure the polarization dependence of scattering intensity without using an analyzer crystal has been developed and applied to a magnetic satellite reflection of rare-earth metal dysprosium. We have successfully observed the scattering plane inclination angle ϑ dependence of satellite peak intensity. The magnetic and charge scattering have definitely different ϑ dependence of scattering intensity, which enables us to distinguish the scattering origins.

Stabilization of zinc-blende cubic AlN in AlN/W superlattices

AlN/W superlattices with bilayer periods of 3.5–7 nm were grown on MgO (001) by magnetron sputtering. For AlN thicknesses lAlN⩽1.5 nm, a cubic phase of AlN was observed using high-resolution cross-sectional transmission electron microscopy and x-ray diffraction (XRD). Pole-figure XRD scans showed a reflection that matched the theoretically predicted interplanar spacing of zinc-blende phase (Zb-AlN), and that could not be explained by either the wurtzite or rocksalt structures. The stabilization of zb–AlN is explained as a result of good interfacial matching between W(100) and zb–AlN(011). When lAlN was increased above 1.5 nm, XRD scans showed a rapid decrease in satellite peak intensities, indicating a degradation of the layered structure, and the appearance of a wurtzite structure.

Mechanical and thermal stability of TiN/NbN superlattice thin films

High-temperature stability and mechanical deformation mechanisms of TiN/NbN superlattice structures have been investigated. Single-crystal TiN/NbN superlattices were deposited by reactive dual-cathode unbalanced magnetron sputtering in an Ar/N 2 discharge onto MgO(001) substrates held at a temperature of 700°C. The thermal stability was studied by X-ray measurements of superlattice satellite peak intensity variation during and after annealing at up to 950°C. The apparent activation energy for metal interdiffusion in the TiN–NbN diffusion couple is temperature-dependent, with values ranging from 2.6 to 4.5 eV. Film hardness as measured by nanoindentation was observed to decrease during annealing, as the result of effective alloying of the nitride layers. TiN/NbN superlattices are ductile at room temperature and exhibit dislocation glide limited to within individual layers in scratching experiments.

High-temperature stability of epitaxial, non-isostructural Mo/NbN superlattices

The effect of 1000 °C vacuum annealing on the structure and hardness of epitaxial Mo/NbN superlattice thin films was studied. The intensity of superlattice satellite peaks, measured by x-ray diffraction, decreased during annealing while new peaks corresponding to a MoNbN ternary phase appeared. The results are consistent with the Mo–Nb–N phase diagram, which shows no mutual solubility between Mo, NbN, and MoNbN. Even after 3-h anneals and a loss of most of the superlattice peak intensity, the room-temperature hardness was the same as for as-deposited superlattices. The retained hardness suggests that a residual nanocomposite structure is retained even after the formation of the ternary structure.

Structural Refinement of X-Ray Diffraction Profile for Artificial Superlattices

A new structural refinement process for BaTiO3/SrTiO3 (BTO/STO) artificial superlattices was proposed, taking into account the effect of interdiffusion between BTO and STO. The samples were prepared using the molecular beam epitaxy (MBE) method on SrTiO3(001) substrates at 600°C. The step model, the phonon model and the supercell model were employed for simulation of the X-ray diffraction (XRD) profiles of the superlattices. The supercell model can deal with arbitrary variations of chemical composition and lattice spacing. A discrepancy in the intensity of satellite peaks was observed when the interdiffusion between BTO and STO was not incorporated in the simulation. In the phonon model, the concentration profile due to interdiffusion was first calculated using Fick's second law, and the coefficient of Fourier series describing the lattice distortion and modulation of the structure factor was determined. The XRD profiles thus simulated almost agreed with the observed ones, but the intensity of Laue peaks was not consistent with the observation. The degree of interdiffusion at each interface was then changed throughout the superstructures using the supercell model, and it was shown that the accuracy of simulation improved markedly.

Comparison of the interdiffusion lengths in GaAs/Al0.35Ga0.65As multiple quantum wells determined from photoluminescence and double crystal X-ray rocking curve measurements

Photoluminescence (PL) and double crystal X-ray rocking curve (DCRC) measurements were performed in order to determine the interdiffusion length in GaAs/AlGaAs multiple quantum wells (MQWs) grown by molecular beam epitaxy (MBE) treated by rapid thermal annealing. The PL spectra show that the ground state energy level in the GaAs quantum well increases after thermal annealing, and the interdiffusion length is calculated using this result. After the potential profile as a function of the diffusion length was determined, an Al mole fraction, an structure factor and an satellite peak of the m=+1 in the well and barrier sides were determined. The diffusion length in the quantum well interface was also determined from the experimental and theoretical values from the satellite peak intensities of the m=±1. The agreement of the interdiffusion length value between PL and DCRC results is reasonable.