Transition from itinerant metamagnetism to ferromagnetism in UCo.sub.1-x./sub.Os.sub.x./sub.Al solid solutions

0490186 - FZÚ 2019 RIV NL eng J - Článek v odborném periodiku
Andreev, Alexander V. - Šebek, Josef - Shirasaki, K. - Daniš, S. - Gorbunov, D.I. - Yamamura, T. - Vejpravová, Jana - Havela, L. - de Boer, F.R.
Transition from itinerant metamagnetism to ferromagnetism in UCo_1-xOs_xAl solid solutions.
Physica B-Condensed Matter. Roč. 536, May (2018), s. 558-563. ISSN 0921-4526. E-ISSN 1873-2135
Grant CEP: GA ČR GA16-03593S
Institucionální podpora: RVO:68378271
Klíčová slova: uranium intermetallics * UCoAl * itinerant electron metamagnetism * ferromagnetism * pressure effects
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.874, rok: 2018

The influence of substitution of a small amount of Os (< 2%) on the Co sublattice on the magnetism of the itinerant metamagnet UCoAl is studied on single-crystalline UCo1-xOsxAl compounds with x = 0.002, 0.005 and 0.01. For x = 0.002, the ground state is still paramagnetic, like in UCoAl. The metamagnetic-transition field is 0.37 T, twice lower than in UCoAl. The compound with x = 0.005 is at the border between the paramagnetic and the ferromagnetic ground state. At T = 2 K, it is ferromagnetic, at elevated temperatures a magnetic field is necessary to maintain the magnetic state. In zero field, the ferromagnetic state vanishes at T = 8 K. The compound with x = 0.01 is a ferromagnet with strong uniaxial magnetic anisotropy similar to the previously studied compounds with x = 0.02-0.20.
Trvalý link: http://hdl.handle.net/11104/0284469