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Mössbauer studies of the N50 permanent magnet

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Abstract

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 Mössbauer 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 (T SR ) and Curie temperature (T C ) were found to be 130 and 600 K, respectively. The Mössbauer spectra of N50 showed abrupt changes in the magnetic hyperfine field (H hf ) and the electric quadrupole shift (E Q ) at temperatures around 130 K, indicating a spin reorientation (T SR ). From the Mössbauer absorption area as a function of the square of the temperature for the N50 permanent magnet, the Debye temperature (Θ D ) was found to be ΘD = 414.7 K.

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Authors and Affiliations

  1. Department of Physics, Kookmin University, Seoul, 136-702, Korea

    Jung Tae Lim, HyunKyu Kim & Chul Sung Kim

  2. Corporate R&D Institute, Samsung Electro-Mechanics, Suwon, 443-743, Korea

    Sung Yong An & Kang Ryong Choi

  3. Department of Physics, Suwon University, Hwaseong, 445-743, Korea

    Eun Joo Hahn

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  1. Jung Tae Lim
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  2. HyunKyu Kim
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  3. Chul Sung Kim
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  4. Sung Yong An
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  5. Kang Ryong Choi
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  6. Eun Joo Hahn
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Correspondence to Chul Sung Kim.

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Lim, J.T., Kim, H., Kim, C.S. et al. Mössbauer studies of the N50 permanent magnet. Journal of the Korean Physical Society 66, 1908–1912 (2015). https://doi.org/10.3938/jkps.66.1908

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  • DOI: https://doi.org/10.3938/jkps.66.1908

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