Effects of magnetic field, electric field, and magnetic anisotropic energy on the magnetic properties of Fe alloyed GaSb diluted magnetic semiconductor

Starting with a Kondo lattice model type Hamiltonian, the effects of the magnetic field, electric field, and magnetic anisotropic energy on the magnetic properties of the Fe/GaSb diluted magnetic semiconductor are studied. The analytical technique is employed to analyze magnon dispersion, magnetization, and critical temperature, Tc. The enhancement of the temperature with increasing impurity concentration x and/or with the magnetic field and electric field is established, which is in good agreement with recent experimental observations. It is clearly shown that magnon dispersion and magnetization can be controlled with these fields applied, magnetic anisotropic energy, and impurity concentration alternatively or all together. Due to the inclusion of the magnetic anisotropic energy, we could identify a significant escalation of magnon dispersion/bandgap energy and a slight reduction of magnetization.