Abstract
AbstractThe temperature dependence of reversible and irreversible portions of the magnetization was measured in polycrystalline nickel specimens. The temperature was varied between – 196 and + 360°C, the hardness of the specimens by cold stretching. The reversible induction was measured by a mutual induction bridge (10 kHz), the irreversible part by BARKHAUSEN discontinuities (m < 8 · 10−7 cgs). The comparison of both contributions along the hysteresis loop yields characteristic properties of that part of magnetization and susceptibility, not covered by the measurements. Conclusions are drawn concerning the size distribution of unmeasurable small discontinuities.
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