The Pole Effect of Ferromagnetic Thin Sheets and Stiffening of Fe-B Base Amorphous Alloys

概要

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Several kinds of ferromagnetic crystalline thin sheets have been made by cold rolling, and some ferromagnetic amorphous ribbons have been prepared from the melts by rapidly quenching method. At the fundamental mode, the so-called "pole effect" of thin sheets has become more pronounced with increasing magnetic field, but this effect has almost vanished below about 100 of the length to thickness ratio of the specimens even at the fundamental mode. The "pole effect" of thin sheets and amorphous ribbons has decreased with increasing the frequency of mode, becoming nearly zero at the third tone mode or more. Magnetic field dependence of Young's modulus for amorphous alloys has been almost saturated above 100 Oe at the third tone mode, and the temperature dependence of Young's modulus for Fe_<80>B_<20> amorphous alloy has showed a stiffening below the Curie temperature. This behavior is very similar to the "pole effect", but the former is not related to the latter because the "pole effect" has been almost reduced by measuring at the third tone mode. Such a peculiar phenomenon has not been observed in Co-B amorphous alloys.
東北大学の論文
1980-03-29