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

Suzuki, D.; Ishii, I.; Kumano, S.; Umeno, T.; Andreev, A. V.; Gorbunov, D.; Suzuki, T.
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.
  • Contribution to proceedings
    International Conference on Strongly Correlated Electron Systems (SCES2019), 23.-28.09.2019, Okayama, Japan
    JPS Conference Proceedings 30(2020), 011165
    DOI: 10.7566/JPSCP.30.011165


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Publ.-Id: 30855