Spin Waves in Ferromagnetic and Antiferromagnetic Materials
作者:
F. Keffer,
H. Kaplan,
Y. Yafet,
期刊:
American Journal of Physics
(AIP Available online 1953)
卷期:
Volume 21,
issue 4
页码: 250-257
ISSN:0002-9505
年代: 1953
DOI:10.1119/1.1933416
出版商: American Association of Physics Teachers
数据来源: AIP
摘要:
A brief outline is given of the spin-wave approximation to the near ground states of ferromagnetism and antiferromagnetism. Simple pictorial models of spin waves are introduced. These models clarify the striking difference between ferromagnetic spin waves, which obey the dispersion lawω ∝ k2, and antiferromagnetic spin waves, which obey the lawω ∞ k. The proper normal modes for antiferromagnetic spin waves are presented. The nature of ferromagnetic and antiferromagnetic resonance is illuminated from a spin-wave point of view.
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