Abstract
A structural and magnetic study of the system <i>X(SrFe<sub>12</sub>O<sub>19</sub>) + (1-X) (BiFeO<sub>3</sub>)</i> with X=0, 0.20, 0.40, 0.50, 0.60, 0.80 and 1.0 is presented in this work. The individual phases were obtained by the Sol-Gel method. The powders were mixed by mechanical grinding, then pressed and sintered. Experimental techniques of X-ray diffraction and vibrational magnetometry were used for the characterization of the samples and the Hanawalt method and the Match! Phase Identification from Powder Diffraction were used for the qualitative determination of the phases present in each sample. Rietveld's analysis was carried out with the FullProf Suite-2008 program. The structural results obtained show slight variations of the crystal lattice parameters for both phases and the coexistence of both phases in each sample. The magnetic characterization shows a linear increase of the saturation magnetization, the remanent magnetization and the magnetic anisotropy constant K<sub>1</sub>, as a function of the concentration of the <i>BiFeO<sub>3</sub></i> and <i>SrFe<sub>12</sub>O<sub>19</sub></i> phases. A satisfactory congruence is observed between the theoretical predictions and the experimental measurements, an indication that the magnetic parameters reported are due to the superposition, in each compound, of their individual values. Both the XRD pattern and the structural and magnetic characterization show that the two phases coexist individually in the matrix and have a good chemical compatibility between them.
Highlights
IntroductionM-type hexagonal ferrites have attracted much attention for their excellent magnetic properties and potential applications in various fields of industry and technology at present [2]
In the last two decades, hybrid materials have received a growing boost in research, since they normally provide a new multi-functional material with different or complementary physical properties to each constituent, which were not present in their individual components, and can provide new or improved properties for various applications [1].M-type hexagonal ferrites have attracted much attention for their excellent magnetic properties and potential applications in various fields of industry and technology at present [2]
It has been shown that in the first magnetization curves and the magnetic hysteresis loops for 0.4 ≤ X the dependence of the BiFeO3 phase predominates, modulated by the contribution of the SrFe12O19 to the total magnetization of the compound while for X ≥ 0.5 the form of the dependence is governed by the SrM, but in this case, modulated by the contribution of the BiFeO3
Summary
M-type hexagonal ferrites have attracted much attention for their excellent magnetic properties and potential applications in various fields of industry and technology at present [2]. The distorted perovskite structure of the simple phase of BiFeO3 is one of the most representative multiferroics and it is of great importance due to its. The contribution of two phases in equilibrium, such as a ferrite and a ferroelectric, form a hybrid compound, which can give rise to a multiferroic material. These are investigated due to their potential applications such as; transducers, sensors, data storage, interrupt devices, etc. These are investigated due to their potential applications such as; transducers, sensors, data storage, interrupt devices, etc. [6, 9]
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