Absence of ferromagnetism in Al-doped Zn0.9Co0.10O diluted magnetic semiconductors

被引：106

作者：

Alaria, J ^{[1
]}

Bieber, H ^{[1
]}

Colis, S ^{[1
]}

Schmerber, G ^{[1
]}

Dinia, A ^{[1
]}

机构：

[1] ULP, ECPM, CNRS, UMR 7504,IPCMS, F-67034 Strasbourg 2, France

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 11期

关键词：

D O I：

10.1063/1.2186079

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A 0.5% Al-doped Zn0.895Co0.100O polycrystalline powder was synthesized by the co-precipitation method. Raman spectroscopy revealed that divalent cobalt ions were substituted for Zn2+ ions into the ZnO matrix and that Al ions activate additional modes which are nonspecific to the dopant. These additional modes disappear after annealing at 1373 K for 1 h under Ar flow. We suggest that the electrical dopant becomes active in substitutional sites after annealing. Resistance measurements confirm that free carriers were created in our sample. Nevertheless, the sample shows the same magnetic properties: a mixture of paramagnetism and antiferromagnetism. (c) 2006 American Institute of Physics.

引用

页数：3

共 18 条

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