Observing spin polarization of individual magnetic adatoms

被引：74

作者：

Yayon, Y. ^{[1
]}

Brar, V. W.

Senapati, L.

Erwin, S. C.

Crommie, M. F.

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.99.067202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have used spin-polarized scanning tunneling spectroscopy to observe the spin polarization state of individual Fe and Cr atoms adsorbed onto Co nanoislands. These magnetic adatoms exhibit stationary out-of-plane spin polarization, but have opposite sign of the exchange coupling between electron states of the adatom and the Co island surface state: Fe adatoms exhibit parallel spin polarization to the Co surface state while Cr adatoms exhibit antiparallel spin polarization. First-principles calculations predict ferromagnetic and antiferromagnetic alignment of the spin moment for individual Fe and Cr adatoms on a Co film, respectively, implying negative spin polarization for Fe and Cr adatoms over the energy range of the Co surface state.

引用

页数：4

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