Two Effects of Changes in Tension

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Abstract
In the Rayleigh region of the initial magnetization, increasing or decreasing of a tension leads to an irreversible increase in magnetization. This phenomenon can be attributed to two effects, namely the first and the second effect. For the first effect, the magnitude of the change of magnetization is directly proportional to the value of magnetization itself and is also directly proportional to the change of tension but independent of the sign of the tension change. For the second effect, the change of magnetization is also directly proportional to the value of magnetization but is not proportional to the change in tension. The second effect has, in general, a different value for increase and decrease of tension and is accompanied by the appearance of un‐symmetrical hysteresis loops. The first effect is caused by the displacement of 180° walls, in contrast to the second effect which is associated with 90° walls.