Abstract
Frequency and temperature dependence of the hysteresis loops (both major and minor hysteresis loops) of well-known materials such as pure Fe and pure Ni in the as-cast state and after a heat treatment, were measured and analyzed. Furthermore temperature dependent magnetostriction of the as-cast and annealed Ni sample were measured and residual stresses were estimated by assuming the magnetoelastic energy as the origin of coercivity H c . The hysteresis measurements were made on fully automized hysteresigraph which is handled by a labview program. The system works with ring- or frame-shaped samples in the frequency range from 0.1 Hz to 2 kHz and in the temperature range from −77 K to 493 K.
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