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Contribution of the crystalline phase Fe100-xSix to the temperature dependence of magnetic properties of FINEMET-type alloys

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6 Author(s)
Turtelli, R.S. ; Inst. fur Experimentalphys., Tech. Univ. Wien, Austria ; Duong, V.H. ; Grossinger, R. ; Schwetz, M.
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The temperature dependence of the hysteresis loop, saturation magnetization, and saturation magnetostriction of rapidly quenched ribbons of the compositions Fe100-xSix (x=12.1, 13.8, 20.0) and of FINEMET-type material with compositions Fe73.6 Cu1Nb3Si13.5B9 Fe73.5Cu1Nb3Si16.5B6 were measured between room temperature and 400°C. This paper analyzes the temperature dependence of the saturation magnetostriction and the saturation magnetization of the FINEMET ribbons after various heat treatments, assuming a superposition of the properties of the nanocrystalline Fe-Si and of the remaining amorphous phase. The behavior of the coercivity of Fe-Si prepared by rapid solidification follows roughly that of the (absolute value) of the magnetostriction. The Curie temperature of the remaining amorphous phase is enhanced

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Magnetics, IEEE Transactions on  (Volume:36 ,  Issue: 2 )