Ferroquadrupolar lattice instability in an antiferromagnetically ordered state in single-crystalline DyCuGe

0585663 - FZÚ 2025 RIV US eng J - Článek v odborném periodiku
Ishii, I. - Sunazaki, K. - Araki, K. - Shoji, M. - Isobe, K. - Andreev, Alexander V. - Suzuki, T.
Ferroquadrupolar lattice instability in an antiferromagnetically ordered state in single-crystalline DyCuGe.
Physical Review B. Roč. 109, č. 19 (2024), č. článku 195102. ISSN 2469-9950. E-ISSN 2469-9969
Grant CEP: GA MŠMT(CZ) EH22_008/0004591; GA MŠMT(CZ) LM2018096
Institucionální podpora: RVO:68378271
Klíčová slova: rare-earth intermetallic compounds * magnetic properties * magnetoacoustics
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.7, rok: 2022

We report on the specific heat, magnetic properties, and ultrasonic measurements of a single-crystalline DyCuGe. We reveal an antiferromagnetic ordering in the (001) plane at TN = 7.4 K, which is higher than the reported transition temperature of polycrystalline samples. The transverse elastic moduli show a pronounced softening down to TN due to interlevel quadrupole-mediated interactions between the ground and excited Kramers doublets. Our experimental and calculated results manifest that ferroquadrupolar interactions give rise to the lattice instability even in an antiferromagnetically ordered state
Trvalý link: https://hdl.handle.net/11104/0353349