Tunable magnetic order of Co nanoparticles and magnetotransport in CoZnO nanocomposites

C. Y. Hsu; J. C.A. Huang; S. F. Chen; C. P. Liu; S. J. Sun; Yonhua Tzeng

doi:10.1063/1.2959081

Tunable magnetic order of Co nanoparticles and magnetotransport in CoZnO nanocomposites

C. Y. Hsu, J. C.A. Huang, S. F. Chen, C. P. Liu, S. J. Sun, Yonhua Tzeng

研究成果: Article › 同行評審

10 引文斯高帕斯（Scopus）

摘要

We demonstrate tunable magnetic order of cobalt nanoparticles in CoZnO nanocomposites. High-density electronic states in ZnO formed during high vacuum annealing help generate bound and free charge carriers, which in turn enable the stable magnetic ordering of Co nanoparticles in the CoZnO nanocomposites in a tunable manner. This is demonstrated by the following experimental observations: (i) enhanced spontaneous magnetization and coercivity, (ii) transition from semiconducting to metallic electrical-transport, and (iii) transverse magnetotransport transition from negative magnetoresistance to the anomalous Hall effect. The work explores a route to manipulate the magnetic order of magnetic nanoparticles by means of intentionally generated defects in oxides.

原文	English
文章編號	072506
期刊	Applied Physics Letters
卷	93
發行號	7
DOIs	https://doi.org/10.1063/1.2959081
出版狀態	Published - 2008

All Science Journal Classification (ASJC) codes

物理與天文學（雜項）

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abstract = "We demonstrate tunable magnetic order of cobalt nanoparticles in CoZnO nanocomposites. High-density electronic states in ZnO formed during high vacuum annealing help generate bound and free charge carriers, which in turn enable the stable magnetic ordering of Co nanoparticles in the CoZnO nanocomposites in a tunable manner. This is demonstrated by the following experimental observations: (i) enhanced spontaneous magnetization and coercivity, (ii) transition from semiconducting to metallic electrical-transport, and (iii) transverse magnetotransport transition from negative magnetoresistance to the anomalous Hall effect. The work explores a route to manipulate the magnetic order of magnetic nanoparticles by means of intentionally generated defects in oxides.",

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AU - Hsu, C. Y.

AU - Huang, J. C.A.

AU - Chen, S. F.

AU - Liu, C. P.

AU - Sun, S. J.

AU - Tzeng, Yonhua

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N2 - We demonstrate tunable magnetic order of cobalt nanoparticles in CoZnO nanocomposites. High-density electronic states in ZnO formed during high vacuum annealing help generate bound and free charge carriers, which in turn enable the stable magnetic ordering of Co nanoparticles in the CoZnO nanocomposites in a tunable manner. This is demonstrated by the following experimental observations: (i) enhanced spontaneous magnetization and coercivity, (ii) transition from semiconducting to metallic electrical-transport, and (iii) transverse magnetotransport transition from negative magnetoresistance to the anomalous Hall effect. The work explores a route to manipulate the magnetic order of magnetic nanoparticles by means of intentionally generated defects in oxides.

AB - We demonstrate tunable magnetic order of cobalt nanoparticles in CoZnO nanocomposites. High-density electronic states in ZnO formed during high vacuum annealing help generate bound and free charge carriers, which in turn enable the stable magnetic ordering of Co nanoparticles in the CoZnO nanocomposites in a tunable manner. This is demonstrated by the following experimental observations: (i) enhanced spontaneous magnetization and coercivity, (ii) transition from semiconducting to metallic electrical-transport, and (iii) transverse magnetotransport transition from negative magnetoresistance to the anomalous Hall effect. The work explores a route to manipulate the magnetic order of magnetic nanoparticles by means of intentionally generated defects in oxides.

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Tunable magnetic order of Co nanoparticles and magnetotransport in CoZnO nanocomposites

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