Magnetic Phase Transitions and Magnetoelastic Phenomena in UNiGa under Pressure

Fuminori Honda, Tomoko Kagayama, Gendo Oomi, Alexander V. Andreev, Ladislav Havela, Vladimir Sechovský, Karel Prokeš, Ekkehard Brück, Karel Prokeš

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Thermal expansion and magnetostriction of UNiGa single crystal have been measured at the range of pressures up to 2.2 GPa and magnetic fields up to 1.5T. The results are reported with a special emphasis on anomalies accompanying the magnetic phase transitions and the effect of pressure on the critical parameters (transition temperature and magnetic field). Formation of a new antiferromagnetic phase induced by pressures above 1.8 GPa is revealed. Analysis of results enabled us to construct P-T magnetic phase diagrams for fields up to 1.5T. The magnetoelastic effects are discussed in terms of marked variations in electronic structure accompanying transitions between different magnetic structures with various couplings of U magnetic moments along the c-axis and involvement of strong spin-orbit interaction.

Original languageEnglish
Pages (from-to)1904-1907
Number of pages4
Journaljournal of the physical society of japan
Volume66
Issue number7
DOIs
Publication statusPublished - 1997 Jan 1
Externally publishedYes

Keywords

  • high pressure
  • magnetic structures
  • magnetic-phase diagram
  • magnetoelastic phenomena
  • thermal expansion
  • uranium compounds

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Honda, F., Kagayama, T., Oomi, G., Andreev, A. V., Havela, L., Sechovský, V., Prokeš, K., Brück, E., & Prokeš, K. (1997). Magnetic Phase Transitions and Magnetoelastic Phenomena in UNiGa under Pressure. journal of the physical society of japan, 66(7), 1904-1907. https://doi.org/10.1143/JPSJ.66.1904