Magnetic anisotropy of textured CrO2 thin films investigated by X-ray magnetic circular dichroism

被引：13

作者：

Goering, E

Justen, M

Geissler, J

Rüdiger, U

Rabe, M

Güntherodt, G

Schütz, G

机构：

[1] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

[2] Rhein Westfal TH Aachen, Inst Phys, D-52056 Aachen, Germany

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2002年 / 74卷 / 06期

关键词：

D O I：

10.1007/s003390201302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Highly a-axis-textured CrO2 films have been deposited on Al2O3 (0001) substrates by chemical vapor deposition. CrO2 has been found to have highly a-axis (010)-oriented columnar growth on a Cr2O3 (0001) initial layer. The sixfold surface symmetry of the Cr2O3 initial layer leads to three equivalent in-plane orientations of the a-axis-oriented CrO2 unit cell. We report Cr L-2,L-3 X-ray magnetic circular dichroism data along the surface normal and at 60degrees off-normal sample orientation. For a 60degrees sample alignment, a strong increase of the projected orbital moment could be observed for unoccupied majority t(2g) states using moment analysis. Therefore, the c axis is identified as the intrinsic magnetic easy axis of CrO2. In addition, a small spin moment and a very strong magnetic dipole term T-z have been found.

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页码：747 / 753

页数：7

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