Magnetic properties of sol-gel-derived doped ZnO as a potential ferromagnetic semiconductor: a synchrotron-based study

被引：18

作者：

Farley, N. R. S. ^{[1
,2
,3
]}

Edmonds, K. W. ^{[1
]}

Freeman, A. A. ^{[1
]}

van der Laan, G. ^{[2
,4
]}

Staddon, C. R. ^{[1
]}

Gregory, D. H. ^{[3
]}

Gallagher, B. L. ^{[1
]}

机构：

[1] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[2] SERC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England

[3] Univ Nottingham, Sch Chem, Nottingham NG7 2RD, England

[4] Diamond Light Source, Didcot OX11 0DE, Oxon, England

来源：

NEW JOURNAL OF PHYSICS | 2008年 / 10卷

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1088/1367-2630/10/5/055012

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A variety of x-ray techniques is employed to investigate sol-gel-synthesized Co- and Mn-doped ZnO films. X-ray diffraction (XRD) shows that the dominant structure is the c-axis orientated wurtzite ZnO. Dopant K-edge extended x-ray absorption fine structure (EXAFS) and x-ray absorption near edge structure (XANES) indicate that the Co and Mn ions are fourfold co-ordinated with valency 2+/3+ and 3+/4+, respectively. Surface-sensitive dopant L-edge XANES and x-ray magnetic circular dichroism (XMCD) for the Co dopant are well described by atomic multiplet calculations for tetrahedral Co2+, while for Mn the data indicate that the symmetry is lowered due to Jahn-Teller distortion. The XMCD show conclusively that both Co- and Mn-doped ZnO films are purely paramagnetic.

引用

页数：11

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