Mössbauer studies of Ba₃Zn₂Fe₂₄O₄₁ Z-type hexaferrite

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• 作者：Jung Tae Lim ; In-Bo Shim ; Chul Sung Kim…
• 关键词：Z ; type hexaferrite ; Ba3Zn2Fe24O41 ; Mössbauer spectroscopy
• 刊名：Journal of the Korean Physical Society
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：70
• 期：1
• 页码：81-84
• 全文大小：
• 刊物主题：Physics, general; Theoretical, Mathematical and Computational Physics; Particle and Nuclear Physics;
• 出版者：The Korean Physical Society
• ISSN：1976-8524
• 卷排序：70

文摘

A Ba₃Zn₂Fe₂₄O₄₁ polycrystalline sample of Zn doped Z-type hexaferrite was prepared by using solid-state reaction method. From the XRD pattern, analyzed by using the Rietveld refinement method at 295 K, the samples were found to be single-phased, and the crystal structure of sample was determined to be hexagonal with space group P6₃/mmc. From the magnetic hysteresis curves at 295 K, the saturation magnetization (M_s) and coercivity (H_c) of sample were M_s = 58.70 emu/g and H_c = 69.58 Oe, respectively, and the samples showed ferrimagnetic behavior. From the temperature dependence of the zero-field-cooled magnetization curves under a magnetic field of 100 Oe at temperatures between 300 and 800 K, the spin transition from planar order to uniaxial order was observed around 400 K, and the Curie temperature (T_C) was found to be 643 K. Mössbauer spectra of sample were also taken and analyzed at various temperatures ranging from 4.2 to 295 K. The relative areas obtained from the Mössbauer spectra suggest that the Zn ions preferentially occupy the tetrahedral sublattices.