Antiferromagnetism and phase transitions in noncentrosymmetric UIrSi.sub.3./sub.

0491094 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Valenta, J. - Honda, F. - Vališka, M. - Opletal, P. - Kaštil, Jiří - Míšek, Martin - Diviš, M. - Sandratskii, L. - Prchal, J. - Sechovský, V.
Antiferromagnetism and phase transitions in noncentrosymmetric UIrSi₃.
Physical Review B. Roč. 97, č. 14 (2018), s. 1-8, č. článku 144423. ISSN 2469-9950. E-ISSN 2469-9969
Grant CEP: GA ČR GA15-03777S
Institucionální podpora: RVO:68378271
Klíčová slova: magnetism * uranium intermetallics * generalized gradient approximation
Obor OECD: Particles and field physics
Impakt faktor: 3.736, rok: 2018

Magnetization and specific-heat measurements on a UIrSi3 single crystal reveal Ising-like antiferromagnetism below T-N = 41.7 K with the easy magnetization direction along the c axis of the tetragonal structure. The antiferromagnetic ordering is suppressed by magnetic fields > H-c (mu H-0(c) = 7.3 T at 2 K) applied along the c axis. The first-order metamagnetic transition at H-c exhibits asymmetric hysteresis reflecting a slow reentry of the complex ground-state antiferromagnetic structure with decreasing field. The hysteresis narrows with increasing temperature and vanishes at 28 K. A second-order metamagnetic transition is observed at higher temperatures.
Trvalý link: http://hdl.handle.net/11104/0285169