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Structural and Magnetic Properties of the Zn-Mn-O System

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Abstract:

Zn-Mn-O semiconductor crystallites with nominal manganese concentration x = 0.01, 0.02, 0.04 and 0.10 were synthesized by a solid state reaction route using oxalate precursors. Thermal treatment procedure was carried out in air at different temperatures in the range 400 - 900°C. The samples were investigated by X-ray diffraction, magnetization measurements and electron paramagnetic resonance. X-ray analysis reveals that dominant crystal phase in the Zn-Mn-O system corresponds to the wurtzite structure of ZnO. Room temperature ferromagnetism is observed in the Zn-Mn-O samples with lower manganese concentration, x ≤ 0.04, thermally treated at low temperature (500°C). Saturation magnetization in the sample with x = 0.01 is found to be 0.05 μB/Mn. The ferromagnetic phase seems to be developed by Zn diffusion into Mn-oxide grains.

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Periodical:

Materials Science Forum (Volume 555)

Pages:

95-100

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.555.95

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Online since:

September 2007

Authors:

D. Milivojević, Jovan Blanuša, V. Spasojević, V. Kusigerski, B. Babić-Stojić

Keywords:

Magnetic Semiconductor, Room Temperature Ferromagnetism, Zn-Mn-O

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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