中国物理B ›› 1996, Vol. 5 ›› Issue (4): 300-305.doi: 10.1088/1004-423X/5/4/007

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

INFLUENCE OF THE SUBSTRATE ON THE MAGNETOSTATIC MODES OF A FINITE SUPERLATTICE

李飚, 杨杰, 沈觉涟   

  1. Institute of Physics, Academia Sinica, Beijing 100080, China
  • 收稿日期:1995-05-17 出版日期:1996-04-20 发布日期:1996-04-20

INFLUENCE OF THE SUBSTRATE ON THE MAGNETOSTATIC MODES OF A FINITE SUPERLATTICE

LI BIAO (李飚), YANG JIE (杨杰), SHEN JUE-LIAN (沈觉涟)   

  1. Institute of Physics, Academia Sinica, Beijing 100080, China
  • Received:1995-05-17 Online:1996-04-20 Published:1996-04-20

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摘要： In a finite layered system, the substrate influences the spectra of the collective excitations. We solve the dispersion relations for magnetostatic modes in a finite Cd0.30Mn0.70Te-Cd0.89Mn0.11Te multilayer structure as a prototype antiferromagnetic and paramagnetic su-perlattice grown on the top of a nonmagnetic or a paramagnetic substrate. In perpendicular magnetization geometry where the saturation magnetization lies along the growth axis of the layered structure, surface modes appear in the spectra when the substrate is paramagnetic but disappear when the substrate is nonmagnetic. At the same time, the bands of bulk modes in the spectra are independent of change of substrates.

Abstract: In a finite layered system, the substrate influences the spectra of the collective excitations. We solve the dispersion relations for magnetostatic modes in a finite Cd0.30Mn0.70Te-Cd0.89Mn0.11Te multilayer structure as a prototype antiferromagnetic and paramagnetic su-perlattice grown on the top of a nonmagnetic or a paramagnetic substrate. In perpendicular magnetization geometry where the saturation magnetization lies along the growth axis of the layered structure, surface modes appear in the spectra when the substrate is paramagnetic but disappear when the substrate is nonmagnetic. At the same time, the bands of bulk modes in the spectra are independent of change of substrates.

中图分类号:  (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))

  • 75.70.Cn
75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 75.50.Ee (Antiferromagnetics) 75.70.Rf (Surface magnetism)