Transition from itinerant metamagnetism to ferromagnetism in UCo1-xOsxAl solid solutions

A. V. Andreev, J. Šebek, K. Shirasaki, S. Daniš, D. I. Gorbunov, Tomoo Yamamura, J. Vejpravová, L. Havela, F. R. de Boer

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)558-563
Number of pages6
JournalPhysica B: Condensed Matter
Publication statusPublished - 2018 May 1


  • Ferromagnetism
  • Itinerant electron metamagnetism
  • UCoAl
  • Uranium intermetallics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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