Observation of large wave vector interface spin waves: Ni(100)/fcc Co(100) and Cu(100)/Co(100)

被引：10

作者：

Rajeswari, J. ^{[1
,2
]}

Ibach, H. ^{[2
,3
]}

Schneider, C. M. ^{[1
,2
]}

机构：

[1] Forschungszentrum Julich, Peter Grunberg Inst PGI 6, D-52425 Julich, Germany

[2] Julich Aachen Res Alliance, Julich, Germany

[3] Forschungszentrum Julich, Peter Grunberg Inst PGI 3, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 23期

关键词：

MAGNETIC-MOMENTS; FILMS; FE; NI; METALS; IRON;

D O I：

10.1103/PhysRevB.87.235415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using electron energy loss spectroscopy, we have probed the spin waves of fcc(100) cobalt after capping with 1-3 atom layers of pseudomorphic nickel or up to 12 atom layers of copper. The intensity decay of the spin wave signal is quantitatively described by the mean-free path of the incident and the scattered electron within the capping layer. The observed spin waves are therefore localized at the cobalt side of the Co/Ni and Co/Cu interfaces. Compared to the free cobalt surface, the interface spin waves are downshifted in frequency. The effect is attributed to a reduced exchange interaction between cobalt atoms at the interface.

引用

页数：5

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