Possible pitfalls in search of magnetic order in thin films deposited on single crystalline sapphire substrates

被引：37

作者：

Salzer, R. ^{[1
]}

Spemann, D. ^{[1
]}

Esquinazi, P. ^{[1
]}

Hoehne, R. ^{[1
]}

Setzer, A. ^{[1
]}

Schindler, K. ^{[1
]}

Schmidt, H. ^{[1
]}

Butz, T. ^{[1
]}

机构：

[1] Univ Leipzig, Inst Expt Phys 2, D-04103 Leipzig, Germany

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 317卷 / 1-2期

关键词：

magnetic oxide;

D O I：

10.1016/j.jmmm.2007.04.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the field and temperature dependence of the magnetic moment of single crystalline sapphire substrates with different surface orientations. All the substrates show a ferromagnetic behavior that partially changes after surface cleaning. The amount of magnetic impurities in the substrates was determined by particle induced X-ray emission. The overall analysis of the data indicates that the magnetic impurities very likely contribute to the measured ferromagnetic behavior but does not rule out completely intrinsic contributions. Our work stresses the necessity to use other than bulk characterization methods for the study of weak ferromagnetic signals of thin films grown on oxide substrates. (c) 2007 Elsevier B. V. All rights reserved.

引用

页码：53 / 60

页数：8

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