Ultrasonic Study of First-Order and Second-Order Magnetoelastic Properties of Yttrium Iron Garnet
- 12 August 1966
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 148 (2) , 530-542
- https://doi.org/10.1103/physrev.148.530
Abstract
First-order and second-order (in strain) magnetoelastic effects in yttrium iron garnet (YIG) have been studied using a pulsed ultrasonic technique and have been interpreted using finite-deformation magnetoelastic theory. Small-amplitude plane-wave modes in , , and directions in uniformly magnetized, homogeneously deformed cubic single crystals have been analyzed including first-order and second-order magnetoelastic coupling. First-order and second-order magnetoelastic constants have been completely determined for YIG. The second-order "morphic" effect has been analyzed and completely evaluated for YIG in terms of 8 "morphic" constants. Experimental results are described which agree with finite-deformation magnetoelastic theory and disagree with small-strain theory.Keywords
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