Room-temperature observation of high-spin polarization of epitaxial CrO2(100) island films at the Fermi energy

被引：76

作者：

Dedkov, YS

Fonine, M

König, C

Rüdiger, U ^{[1
]}

Güntherodt, G

Senz, S

Hesse, D

机构：

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

[2] Max Planck Inst Mikrostrukturphys, D-06120 Halle Saale, Germany

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 22期

关键词：

D O I：

10.1063/1.1482142

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Epitaxial CrO2(100) island films have been grown on TiO2(100) substrates by a chemical-vapor deposition technique. Well-controlled surface and interface properties of the CrO2(100) films were confirmed by scanning tunneling microscopy and transmission electron microscopy, respectively. Spin- and angle-resolved photoemission spectroscopy at room temperature revealed an energy gap of about 2 eV below Fermi level E-F for spin-down electrons and a spin polarization of about +95% at E-F. After extended sputtering, the spin polarization can be recovered from about +10% up to +85% upon annealing. (C) 2002 American Institute of Physics.

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页码：4181 / 4183

页数：3

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