M¨ossbauer Studies of the N50 Permanent Magnet
M¨ossbauer Studies of the N50 Permanent Magnet
임정태(국민대학교); 김현규(국민대학교); 김철성(국민대학교); Sung Yong An(Samsung Electro-Mechanics); Kang Ryong Choi(Samsung Electro-Mechanics); 한은주(수원대학교)
66권 12호, 1908~1912쪽
초록
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.
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 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.
- 발행기관:
- 한국물리학회
- 분류:
- 물리학