M¨ossbauer Studies of the N50 Permanent Magnet

The crystal and the magnetic properties of the N50 permanent magnet, which is widely used in industrial applications, have been studied by using x-ray diffractometer (XRD), vibrating sample magnetometer (VSM), and M¨ossbauer spectrometer. The crystal structure was determined to be tetragonal with a...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2015, 66(12), , pp.1908-1912
Main Authors: 임정태, 김현규, 김철성, Sung Yong An, Kang Ryong Choi, 한은주
Format: Article
Language:English
Subjects:
물리학
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Summary:The crystal and the magnetic properties of the N50 permanent magnet, which is widely used in industrial applications, have been studied by using x-ray diffractometer (XRD), vibrating sample magnetometer (VSM), and M¨ossbauer spectrometer. The crystal structure was determined to be tetragonal with a Nd-Fe-B structure. Based on the M-T curves, the values of spin reorientation temperature (TSR) and Curie temperature (TC) were found to be 130 and 600 K, respectively. The M¨ossbauer spectra of N50 showed abrupt changes in the magnetic hyperfine field (Hhf ) and the electric quadrupole shift (EQ) at temperatures around 130 K, indicating a spin reorientation (TSR). From the M¨ossbauer absorption area as a function of the square of the temperature for the N50 permanent magnet, the Debye temperature (D) was found to be D = 414.7 K. KCI Citation Count: 1
ISSN:0374-4884
1976-8524