EPR characterization of Co-doped ZnO microwires and distant spin-pair coupling

被引：14

作者：

Savoyant, A. ^{[1
]}

Giovannelli, F. ^{[2
]}

Delorme, F. ^{[2
]}

Stepanov, A. ^{[1
]}

机构：

[1] Aix Marseille Univ, FST, CNRS UMR 6242, IM2NP, F-13397 Marseille 20, France

[2] Univ Francois Rabelais Tours, CNRS, CEA, INSA CVL,GREMAN UMR 7347,IUT Blois, F-41029 Blois, France

来源：

SEMICONDUCTOR SCIENCE AND TECHNOLOGY | 2015年 / 30卷 / 07期

关键词：

electron paramagnetic resonance; zinc oxyde; microwires; SEMICONDUCTORS;

D O I：

10.1088/0268-1242/30/7/075004

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Cobalt-doped ZnO microwires have been grown by the optical furnace method with Co concentration in the range 0-5%. The high crystallinity of these objects is demonstrated by the use of electron paramagnetic resonance (EPR), in which Co2+ ions serve as magnetic probes. The spin state of these isolated magnetic impurities and their location in the host crystal are addressed by EPR, as well as the coupling constant between non-nearest Co2+-Co2+ neighbors. Eight of these distant spin pairs are detected, among which two are confirmed to be ferromagnetic. The problem of their localization in the wurtzite structure is discussed.

引用

页数：7

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