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The Magnetostriction of Nickel
E. W. Lee and M. A. Asgar
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences
Vol. 326, No. 1564 (Dec. 21, 1971), pp. 73-85
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/77906
Page Count: 13
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The five magnetostriction constants h1 to h5 have been determined for nickel at 4.2, 77 and 300 K from independent measurements on two crystals. At 4.2 K, h3,h4 and h5 are all small compared with h1 and h2 and there is nothing to suggest that a five-constant equation inadequately represents the magnetostrictive behaviour of nickel at this temperature. Within the temperature range h3 is positive, implying that the first anisotropy constant, K1, increases under pressure--in agreement with direct measurements. The combinations h1-1/4h3+5/6h4 and h2+1/12+2/9h5 have been measured at small temperature intervals from 4.2 to 300 K. From these the appropriate combinations of magnetoelastic constants have been determined and their temperature variation compared with the theory of Callen & Callen (1963); agreement is poor. It is concluded that the magnetoelastic constants of nickel do not follow the third power law (nor more general expressions which use the same basis) and that the first anisotropy constant does not obey the tenth power law.
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences © 1971 Royal Society