Abstract
We present a theoretical investigation of the influence of photo-excitation and spin wave scattering on magnetization of the (Ga,Mn)As diluted magnetic semiconductor (DMS) quantum wires (QWRs) and quantum wells (QWs). Double time temperature dependent Green’s function formalism is used for the description of dispersion and spectral density of the systems. Our analysis indicates that spin wave scattering plays an influential role in magnetism of both systems while application of light is insignificant in quantum wells. In the absence of spin wave scattering and at sufficiently low temperatures, a result corresponding to the specific heat of dominating electronic contributions in metals is obtained in QWs. In QWRs, however, this magnetic property is found to vary with T1/2 and α2T1/2 so that light matter coupling has a leading effect on lower temperatures, where α is the light matter coupling factor and T is the temperature.
Highlights
The discovery of giant magnetoresistive (GMR) phenomena in the late 1980’s [1,2] was remarkable in its innovation which can be used as magnetoresistance sensor
Effect of photo-excitation and spin wave scattering on ferromagnetism of the (Ga,Mn)As diluted magnetic semiconductor (DMS) quantum wires (QWRs) and quantum wells (QWs) are studied in detail
In the case of QWR, ferromagnetic transition temperature TC is shown to decrease with increase in magnetic impurity concentration x but depends on photon magnon interaction strength at sufficiently low temperatures in which Magnetization m T ascends while Cmag curves up decreasing with rise in temperature
Summary
The discovery of giant magnetoresistive (GMR) phenomena in the late 1980’s [1,2] was remarkable in its innovation which can be used as magnetoresistance sensor. It has led to the search for efficient and high density electronic devices with very large storage capability. This has aroused a lot of research interest in the study of diluted magnetic semiconductors (DMSs). Mn is known to be advantageous as it produces a special quality introducing high density of magnetic moments and holes to the system Magnetization, ferromagnetic transition temperature TC, and specific heat, Cmag are obtained and compared with the available experimental results
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
