Journal of the Korean Magnetics Society (한국자기학회지)

The Korean Magnetics Society (한국자기학회)
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$T^{3/2}$ Temperature Dependence of Magnetization of Amorphous $Fe_{80-x}Co_xB_{20}$

비정질합금 $Fe_{80-x}Co_xB_{20}$ 자화값의 $T^{3/2}$ 온도 의존성

  • Yu, Byeong-Du (Department of Material Science, Chungnam National University) ;
  • Kim, Jong-O (Department of Material Science, Chungnam National University) ;
  • Kim, Gyeong-Seop (Department of Physics, Chungbuk National University) ;
  • Yu, Seong-Cho (Department of Physics, Chungbuk National University)
  • Published : 1992.11.01
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Abstract

The temperature-dependent saturation magnetization curves of amorphous $Fe_{80-x}Co_xB_{20}$ (8 ${\le}$ x ${\le}$ 40, the step of x is 8) alloys were measured using a vibrating sample magnetometer from 77 K up to 1000 K. Curie temperature and the Bloch coefficient were estimated from the saturation magnetization curves. The low temperature dependence of magnetization is in good agreement with Bloch relation, $M_s(T)$=$M_s(O)$ (1-$BT^{3/2}$ - ${\cdots}.$). The spin wave stiffness constant, tne range of the exchange interaction, and the probable atomic spin were calculated from the saturation magnetization values.

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