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Magnetization behavior and magnetic viscosity in nanocomposite Pr9Fe74Co12B5Snx(x=0, 0.5) ribbons

He Shu-Li Zhang Hong-Wei Chen Ren-Jie Rong Chuan-Bing Sun Ji-Rong Shen Bao-Gen Chen Yun-Zhong

Magnetization behavior and magnetic viscosity in nanocomposite Pr9Fe74Co12B5Snx(x=0, 0.5) ribbons

He Shu-Li, Zhang Hong-Wei, Chen Ren-Jie, Rong Chuan-Bing, Sun Ji-Rong, Shen Bao-Gen, Chen Yun-Zhong
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  • Received Date:  10 August 2005
  • Accepted Date:  08 September 2005
  • Published Online:  20 December 2005

Magnetization behavior and magnetic viscosity in nanocomposite Pr9Fe74Co12B5Snx(x=0, 0.5) ribbons

  • 1. (1)首都师范大学物理系,北京 100037; (2)中国科学院物理研究所磁学国家重点实验室,北京 100080; (3)中国科学院物理研究所磁学国家重点实验室,北京 100080;首都师范大学物理系,北京 100037

Abstract: Nanocomposite Pr9Fe74Co12B5 and Pr9Fe74Co12B5Sn0.5 ribbons were directly prepared by melt-spinning. Measurements of reversible and irreversible magnetization and magnetic viscosity were performed on the ribbons. It is found that the demagnetization curves of the both samples show a single hard phase behavior at room temperature, while a two-phase behavior at low temperature. The sample with Sn addition, because of its more homogeneous microstructure, shows a more obvious two-phase behavior than the Sn free one at low temperature. Furthermore, the increase of the volume fraction and grain sizes of the soft phase, in the Sn-doped ribbons, increases the portions of reversible magnetization and decreases the nucleation field Hn. The investigation of the magnetic viscosity shows that the activation volume is related to the grain sizes of the soft phase.

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