Magnetic phases and magnetoelastic phenomena in UNiGa under pressure

F. Honda, K. Prokeš, M. Olšovec, F. Bourdarot, P. Burlet, T. Kagayama, G. Oomi, L. Havela, V. Sechovský, A. V. Andreev, E. Brück, F. R. De Boer, A. A. Menovsky, M. Mihálik

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

UNiGa exhibits several antiferromagnetic (AF) phases below TN=39 K. The related magnetic phase transitions cause pronounced thermoexpansion anomalies of opposite sign for the c- and a-axes, respectively, leaving volume effects nearly negligible. Magnetic fields applied along the c-axis induce transitions from the AF phases to an uncompensated AF and/or to a ferromagnetic (F) phase accompanied by magnetostriction effects. Our results on pressure influence on the thermoexpansion and magnetostriction anomalies allow us to propose a tentative p-T magnetic phase diagram. A new AF phase induced by pressures above 1.8 GPa has been found. Neutron-diffraction studies under hydrostatic pressure up to 0.9 GPa and in magnetic fields up to 2 T confirmed that the critical temperatures and the critical fields of transitions of UNiGa are strongly pressure dependent (some phases are even suppressed) although relevant magnetic structures themselves remain essentially unchanged.

本文言語英語
ページ(範囲)495-498
ページ数4
ジャーナルJournal of Alloys and Compounds
271-273
DOI
出版ステータス出版済み - 6 12 1998
外部発表はい

All Science Journal Classification (ASJC) codes

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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