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Tytuł:
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Temperature dependence of the magnetostriction in polycrystalline PrFe1.9 and TbFe2 alloys: Experiment and theory.
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Autorzy:
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Tang, Y. M.
Chen, L. Y.
Zhang, L.
Huang, H. F.
Xia, W. B.
Zhang, S. Y.
Wei, J.
Tang, S. L.
Du, Y. W.
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Temat:
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METALLIC composites
MAGNETOSTRICTION
RARE earth metals
ALLOYS
MAGNETISM
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Źródło:
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Journal of Applied Physics; 2014, Vol. 115 Issue 17, p173902-1-173902-6, 6p
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A remarkable magnetostriction λ111 as large as 6700 ppm was found at 70K in PrFe1.9 alloy. This value is even larger than the theoretical maximum of 5600 ppm estimated by the Steven's equivalent operator method. The temperature dependence of λ111 for PrFe1.9 and TbFe2 alloys follows well with the single-ion theory rule, which yields giant estimated λ111 values of about 8000 and 4200 ppm for PrFe1.9 and TbFe2 alloys, respectively, at 0K. The easy magnetization direction of PrFe1.9 changes from [111] to [100] as temperature decreases, which leads to the abnormal decrease of the magnetostriction k. The rare earth sublattice moment increases sharply in PrFe1.9 alloy with decreasing temperature, resulting in the remarkably largest estimated value of λ111 at 0K according to the single-ion theory. [ABSTRACT FROM AUTHOR]
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