REAL TIME VISUALIZATION OF ALTERNATING MAGNETIC FIELDS USING 2-DIMENSIONAL INTEGRATED HALL SENSOR ARRAY

Satoru Kobayashi – Seiki Takahashi – Atsushi Saito – Nobuhiro Kikuchi
– Hiroaki Kikuchi – Yasuhiro Kamada – Toetsu Shishido

   An universal scaling power-law rule of magnetic minor hysteresis loops, which is valid in all investigated materials, ie a relation between W_F^* and M_R^* is introduced. The relation gives an universal exponent of 1.4 and an obtained coefficient shows a similar behavior to the structure sensitive magnetic property, coercive force. Results for pure cobalt as well as strain-induced α'- martensites in 304-type stainless steels will be given as examples. This new scaling rule offers an opportunity for evaluating magnetic quality of materials, to which the existing scaling rules cannot be applied.

Keywords: magnetic minor hysteresis loops, nondestructive testing, scaling analysis, Cobalt, stainless steel

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