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G. Shilyashki, H. Pfützner, F. Hofbauer, V. Galabov, E Mulasalihovic, M. Palkovits:
"Dynamics Effects on Magnetostriction Under Rotational Magnetization";
Poster: International Workshop on 1&2 Dimensional Magnetic Measurement and Testing, Wien, Österreich; 2012-09-03 - 2012-09-06; in: "Short Paper Proceedings", (2012), ISBN: 3-902-105-03-8; 41 - 42.

As well known, losses of g.o. SiFe tend to rise if alternating magnetization (AM) includes distortions. As well, they rise if rotational magnetization (RM) shows uneven angular velocity. Here we studied whether such dynamics have also effects on magnetostriction (MS). Investigations were carried out by means of a rotational single sheet tester on two grades of transformer core steel. In general, the results indicate restricted effects on the intensity of MS, but distinct ones on the harmonics. In special, increases of the maximum angular velocity of the vector B yield a tendency of decreased peak-to-peak MS, due to a decreased fundamental component (100 Hz). However, the higher harmonics increase in distinct ways by up to about 300%. As a conclusion, the usual modelling with even angular velocity tends to under-estimate the higher harmonics of vibrations which are of specific acoustic relevance for the physiology of the human ear.