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Ferroquadrupolar lattice instability in an antiferromagnetically ordered state in single-crystalline DyCuGe
- 1.0585663 - FZÚ 2025 RIV US eng J - Journal Article
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
R&D Projects: GA MŠMT(CZ) EH22_008/0004591; GA MŠMT(CZ) LM2018096
Institutional support: RVO:68378271
Keywords : rare-earth intermetallic compounds * magnetic properties * magnetoacoustics
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.7, year: 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
Permanent Link: https://hdl.handle.net/11104/0353349
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