Quadrupolar response from the crystal electric field level scheme consisting of only Kramers doublets in DyNiAl

0539060 - FZÚ 2021 RIV JP eng C - Conference Paper (international conference)
Suzuki, D. - Ishii, I. - Kumano, S. - Umeno, T. - Andreev, Alexander V. - Gorbunov, D.I. - Suzuki, T.
Quadrupolar response from the crystal electric field level scheme consisting of only Kramers doublets in DyNiAl.
JPS Conference Proceedings. Vol. 30. Tokyo: Physical Society of Japan, 2020 - (Hotta, T.; Katsufuji, T.), s. 1-5, č. článku 011165. ISBN 978-4-89027-142-9. ISSN 2435-3892.
[International Conference on Strongly Correlated Electron Systems (SCES2019). Okayama (JP), 23.09.2020-28.09.2020]
R&D Projects: GA ČR(CZ) GA19-00925S
Institutional support: RVO:68378271
Keywords : crystal electric field * DyNiAl * electric quadrupole * elastic modulus
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)

The rare earth compound DyNiAl shows ferromagnetic and antiferromagnetic phase transitions at TC = 30 K and T1 = 15 K, respectively. Elastic properties of DyNiAl have been investigated by means of ultrasonic spectroscopy. The transverse elastic modulus C44 shows an elastic softening below 60 K and exhibits a bend at TC. The softening continues down to T1 and an elastic hardening is observed below T1. The softening above TC is well reproduced by Curie-Weiss-type equation including a quadrupole interaction. A quadrupole-quadrupole coupling constant obtained from C44 is negative, suggesting an antiferroquadrupolar-type interaction between quadrupoles Oyz or Ozx.

Permanent Link: http://hdl.handle.net/11104/0316814