Spin reorientation in UFe2 upon non-magnetic substitution in the uranium sublattice

The spin reorientation from the 〈111〉 to the 〈100〉 easy-magnetization axis as a consequence of the competition between the cubic magnetocrystalline anisotropy constant K10 and the magnetoelastic contribution to the magnetic anisotropy ΔK1me was predicted and observed upon magnetic dilution of the ur...

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Bibliographic Details
Published in:Journal of alloys and compounds 2002-05, Vol.337 (1-2), p.18-24
Main Authors: Andreev, A.V, Levitin, R.Z
Format: Article
Language:English
Subjects:
Actinide compound
Anisotropy
Magnetic measurements
Magnetically ordered materials
Transition metal compound
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Summary:The spin reorientation from the 〈111〉 to the 〈100〉 easy-magnetization axis as a consequence of the competition between the cubic magnetocrystalline anisotropy constant K10 and the magnetoelastic contribution to the magnetic anisotropy ΔK1me was predicted and observed upon magnetic dilution of the uranium sublattice of UFe2. The total K1=K10+ΔK1me was determined from the magnetization measurements on single crystals of UFe2 and U0.8Lu0.2Fe2 as −0.21 and 0.15 MJ/m3 (at 4.2 K), respectively. The individual values of K10 and ΔK1me in UFe2 were found as 1.03 and −1.24 MJ/m3, respectively, which shows that the low magnetic anisotropy of UFe2 is a result of the mutual cancellation of rather large K10 and ΔK1me. The change of the anisotropy type is accompanied by the disappearance of spontaneous magnetostriction distortion in U0.8Lu0.2Fe2.
ISSN:0925-8388
1873-4669
DOI:10.1016/S0925-8388(01)01911-9