Spectroscopic identification and direct imaging of interfacial magnetic spins -: art. no. 247201

被引：192

作者：

Ohldag, H

Regan, TJ

Stöhr, J

Scholl, A

Nolting, F

Lüning, J

Stamm, C

Anders, S

White, RL

机构：

[1] Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[3] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[4] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[5] Univ Dusseldorf, Inst Angew Phys, D-40225 Dusseldorf, Germany

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.87.247201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using x-ray absorption spectromicroscopy we have imaged the uncompensated spins induced at the surface of antiferromagnetic (AFM) NiO(100) by deposition of ferromagnetic (FM) Co. These spins align parallel to the AFM spins in NiO(100) and align the FM spins in Co. The uncompensated interfacial spins arise from an ultrathin CoNiOx layer that is formed upon Co deposition through reduction of the NiO surface. The interfacial Ni spins are discussed in terms of the "uncompensated spins" at AFM/FM interfaces long held responsible for coercivity increases and exchange bias. We find a direct correlation between their number and the size of the coercivity.

引用

页数：4

共 21 条

[1] Photoemission electron microscope for the study of magnetic materials [J].