Sublattice contributions to the magnetism of UFe.sub.5./sub.Al.sub.7./sub. and UFe.sub.6./sub.Al.sub.6./sub..

0342562 - FZÚ 2011 RIV NL eng J - Journal Article
Andreev, Alexander V. - Tereshina, Evgeniya - Šantavá, Eva - Šebek, Josef - Koyama, K. - Watanabe, K.
Sublattice contributions to the magnetism of UFe₅Al₇ and UFe₆Al₆.
Journal of Alloys and Compounds. Roč. 492, 1-2 (2010), s. 52-55. ISSN 0925-8388. E-ISSN 1873-4669
R&D Projects: GA ČR GA202/09/0339
Institutional research plan: CEZ:AV0Z10100520
Keywords : uranium intermetallics * ThMn₁₂-type structure * ferromagnetism * magnetic anisotropy
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.138, year: 2010

Magnetization study of intermetallic compounds UFe5Al7 and UFe6Al6 with the tetragonal crystal structure is performed on single crystals. The compounds are ferromagnets with Curie temperatures of 275 K and 315 K, respectively, and possess large magnetocrystalline anisotropy of the easy-plane type with the anisotropy field exceeding 20 T. In both UFe5Al7 and UFe6Al6, a noticeable anisotropy within the basal plane is observed with the [110] axis as the easy-magnetization direction, the [100] curve saturates in fields above 1 T. The in-plane anisotropy is the evidence for the U magnetism because it was not observed in Lu analogue. The large anisotropy persists in the paramagnetic state as well, again due to the U sublattice because it is absent in LuFe6Al6. Magnetic moments of the U and Fe atoms are estimated as 1.8 μB and 1.3 μB, respectively.
Permanent Link: http://hdl.handle.net/11104/0185267