中国物理B ›› 2009, Vol. 18 ›› Issue (5): 2006-2011.doi: 10.1088/1674-1056/18/5/046
任敏, 张磊, 胡九宁, 董浩, 邓宁, 陈培毅
Ren Min(任敏), Zhang Lei(张磊), Hu Jiu-Ning(胡九宁), Dong Hao(董浩), Deng Ning(邓宁), and Chen Pei-Yi(陈培毅)†
摘要: This paper proposes a symmetry ensemble model for the magnetic dynamics caused by spin transfer torque in nanoscale pseudo-spin-valves, in which individual spin moments in the free layer are considered as subsystems to form a spinor ensemble. The magnetization dynamics equation of the ensemble was developed. By analytically investigating the equation, many magnetization dynamics properties excited by polarized current reported in experiments, such as double spin wave modes and the abrupt frequency jump, can be successfully explained. It is pointed out that an external field is not necessary for spin wave emitting (SWE) and a novel perpendicular configuration structure can provide much higher SWE efficiency in zero magnetic field.
中图分类号: (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))