Dynamic Behaviour of the s‐d Model

Exchange integrals and magnetic short range order in the system CdCr2−Ga Se4(0⩽x⩽0.06)

“…The inverse of the 4 Â 4 matrices of the susceptibility is more complicated and no mathematical approximation can be used because of the translational invariance of the green functions. However, one may approximate the spinel structure by a simple cubic lattice which have the same first and second coordinate numbers as the spinel structure [14].…”

Magnetic phase diagram of diluted spinel Zn1−xCuxCr2Se4 system

“…The inverse of the 4 Â 4 matrices of the susceptibility is more complicated and no mathematical approximation can be used because of the translational invariance of the green functions. However, one may approximate the spinel structure by a simple cubic lattice, which have the same first and second coordinate numbers as the spinel the factor structure [26]. g i ðqÞ is defined by…”

Theory of surface spin waves in ferromagnetic semiconductors

“…The magnetic excitations in bulk ferromagnetic semiconductors ͑FMS's͒ are obtained already, where two different frequency spin wave branches exist corresponding to ''acoustic'' and ''optical'' branches. 8,9 Shen and Li 10 have studied the SSW in a semiinfinite antiferromagnetic and ferrimagnetic semiconductor at low temperatures in the narrow-band limit, where the hopping exchange interaction of conduction electrons can be omitted. The dispersion relations of surface excitations are obtained by use of Green's-function theory.…”