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Magnetism in Mn-doped ZnO bulk samples prepared by solid state reaction

SJ HanDepartment of Physics and Electron Spin Science Center, Pohang University of Science and Technology, Pohang, 790-784, S. KoreaT.-H. JangDepartment of Physics and Electron Spin Science Center, Pohang University of Science and Technology, Pohang, 790-784, S. KoreaYun-Bae KimDepartment of Physics and Electron Spin Science Center, Pohang University of Science and Technology, Pohang, 790-784, S. KoreaB.-G. ParkDepartment of Physics and Electron Spin Science Center, Pohang University of Science and Technology, Pohang, 790-784, S. KoreaJi Hoon ParkDepartment of Physics and Electron Spin Science Center, Pohang University of Science and Technology, Pohang, 790-784, S. KoreaYoon Hee JeongDepartment of Physics and Electron Spin Science Center, Pohang University of Science and Technology, Pohang, 790-784, S. Korea

2003en

ABI

Annotatsiya

Contrasting magnetic properties were obtained from bulk Mn-doped ZnO synthesized under different processing conditions. While a ferrimagnetic phase transition was observable in a Zn0.95Mn0.05O sample processed at 1170 K, no such transition was found for a sample with the same composition processed at 1370 K. The detailed magnetic, structural, and spectroscopic studies of these two samples have revealed that the ferrimagnetic transition in the former sample is attributable to the secondary phase, (Mn,Zn)Mn2O4, in the system. For the latter sample processed at higher temperature, no secondary phase was detected and the major feature of the system remained paramagnetic down to 4 K. The implication of the present results for Mn-doped ZnO thin films is discussed.

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Identifikatorlar

DOI: 10.1063/1.1597414

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