Spin Wave Dispersion on the Nanometer Scale

被引：46

作者：

Gao, C. L. ^{[1
]}

Ernst, A. ^{[1
]}

Fischer, G. ^{[2
]}

Hergert, W. ^{[2
]}

Bruno, P. ^{[1
,3
]}

Wulfhekel, W. ^{[1
,4
]}

Kirschner, J. ^{[1
]}

机构：

[1] Max Planck Inst Microstruct Phys, D-06120 Halle, Germany

[2] Univ Halle Wittenberg, Inst Phys, D-06099 Halle, Germany

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[4] Univ Karlsruhe TH, Inst Phys, D-76131 Karlsruhe, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.101.167201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Hot electrons injected into antiferromagnetic Mn layers from the tip of a low temperature scanning tunneling microscope have been used to determine the energies, lifetimes, and momenta of antiferromagnetic spin waves on the nanometer scale. The spin waves show a linear dispersion with a velocity of 160 +/- 10 meV angstrom and lifetimes that scale linearly with energy in agreement with neutron scattering and theory. It is shown that the method is sensitive enough to detect the influence of surface anisotropies on the spin wave dispersion.

引用

页数：4

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