Distinct field-induced ferroquadrupolar states for two different magnetic-field directions in DyNiAl

0543936 - FZÚ 2022 RIV US eng J - Článek v odborném periodiku
Ishii, I. - Suzuki, D. - Umeno, T. - Kurata, Y. - Wada, Y. - Suzuki, T. - Andreev, Alexander V. - Gorbunov, D.I. - Miyata, A. - Zherlitsyn, S. - Wosnitza, J.
Distinct field-induced ferroquadrupolar states for two different magnetic-field directions in DyNiAl.
Physical Review B. Roč. 103, č. 19 (2021), č. článku 195151. ISSN 2469-9950. E-ISSN 2469-9969
Grant CEP: GA ČR(CZ) GA19-00925S; GA MŠMT(CZ) LM2018096
Institucionální podpora: RVO:68378271
Klíčová slova: rare-earth intermetallics * antiferrimagnetism * ultra-high magnetic fields * field-induced transtions
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.908, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevB.103.195151

The hexagonal compound DyNiAl undergoes ferromagnetic and antiferromagnetic-type magnetic phase transitions at TC = 30 K and T1 = 15 K, respectively. To investigate the 4f-electronic state and quadrupole interactions, we carried out ultrasonic measurements versus temperature and magnetic field. The transverse elastic moduli C44 and C66 show a prominent softening originating from an interlevel ferroquadrupolar-type interaction between the ground state and excited Kramers doublets. In magnetic fields applied along the [100] and [001] axes, we observed a field-induced phase transition. Because the quadrupole interaction is enhanced in high magnetic fields according to our calculations, we suggest a magnetic-field-induced ferroquadrupolar ordering of the electric quadrupoles Oxz and Oyz for fields applied along [100] and [001], respectively, with different quadrupolar order parameters depending on the field direction.
Trvalý link: http://hdl.handle.net/11104/0321030