Spectroscopic observation of strain-assisted TC enhancement in EuO upon Gd doping

被引：12

作者：

Altendorf, S. G. ^{[1
,2
]}

Hollmann, N. ^{[2
]}

Sutarto, R. ^{[1
]}

Caspers, C. ^{[1
]}

Wicks, R. C. ^{[3
]}

Chin, Y. -Y. ^{[1
,2
]}

Hu, Z. ^{[1
,2
]}

Kierspel, H. ^{[1
]}

Elfimov, I. S. ^{[3
]}

Hsieh, H. H. ^{[4
]}

Lin, H. -J. ^{[5
]}

Chen, C. T. ^{[5
]}

Tjeng, L. H. ^{[1
,2
]}

机构：

[1] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[2] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[3] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[4] Natl Def Univ, Chung Cheng Inst Technol, Tao Yuan 335, Taiwan

[5] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 08期

关键词：

FERROMAGNETIC SEMICONDUCTOR EUO; DOPED EUO; EUROPIUM CHALCOGENIDES; FILMS; EXCHANGE; PRESSURE;

D O I：

10.1103/PhysRevB.85.081201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The origin of the Curie temperature enhancement of EuO upon Gd doping is studied by using soft x-ray absorption spectroscopy on epitaxial pure and Gd-doped EuO thin films. Temperature-and doping-dependent changes in the oxygen K edge spectra provide information about the correlation of magnetism and lattice. Band-structure calculations reveal that these spectral changes as well as the increase of the Curie temperature to 125 K for Gd-doped EuO cannot be explained by electron doping alone. The compression of the crystal lattice due to the incorporation of the smaller Gd3+ ions plays also an important role.

引用

页数：4

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