Giant isotropic magnetostriction of itinerant-electron metamagnetic La(Fe[sub 0.88]Si[sub 0.12])[sub 13]H[sub y] compounds

Fujieda, S.; Fujita, A.; Fukamichi, K.; Yamazaki, Y.; Iijima, Y.
July 2001
Applied Physics Letters;7/30/2001, Vol. 79 Issue 5
Academic Journal
La(Fe[sub x]Si[sub 1-x])[sub 13] compounds exhibit an itinerant-electron metamagnetic (IEM) transition above Curie temperature T[sub C]. The IEM transition in the compound with x=0.88 is accompanied by a giant volume change. From a practical viewpoint, T[sub C] was controlled by hydrogen absorption in order to obtain such a giant volume magnetostriction at room temperature. For the La(Fe[sub 0.88]Si[sub 0.12])[sub 13]H[sub 1.0] compound, the IEM transition occurs above T[sub C]=278 K, and a significant isotropic linear magnetostriction of about 0.3% at 7 T is induced in the vicinity of room temperature. This large magnetostriction is attributed to the giant volume magnetostriction of about 1% by the IEM transition. © 2001 American Institute of Physics.


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