Soft mode of antiferromagnetic multilayers near the surface spin-flop transition -: art. no. 014409

被引：4
作者：
Dantas, AL [1 ]
Vieira, SR
Almeida, NS
Carriço, AS
机构：
[1] Univ Fed Rio Grande Norte, Dept Fis Teorica & Expt, BR-59072970 Natal, RN, Brazil
[2] Univ Estado Rio Grand Norte, Dept Fis, BR-59610210 Mossoro, RN, Brazil
[3] Univ Fed Sergipe, Dept Fis, BR-49100000 Sao Cristovao, SE, Brazil
来源：
PHYSICAL REVIEW B | 2005年 / 71卷 / 01期
关键词：
D O I：
10.1103/PhysRevB.71.014409
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate the long wavelength soft mode of antiferromagnetic (AF) multilayers near the field induced instability of the AF order. We show that in the vicinity of the surface spin flop field (H-SSF) the frequency of the lowest mode is Omega(2)/gamma(2)=alpha(H-SSF-H)+beta(H-SSF-H)(2), where alpha and beta are functions of the magnetic parameters of the multilayer and H is the external field strength. For antiferromagnetic films the first order term is zero (due to the absence of demagnetizing effects) and beta=1.
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页数：5
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