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Ultrasonic study on the hexagonal antiferromagnet Dy.sub.3./sub.Ru.sub.4./sub.Al.sub.12./sub.
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SYSNO ASEP 0476793 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Ultrasonic study on the hexagonal antiferromagnet Dy3Ru4Al12 Author(s) Ishii, I. (JP)
Takezawa, K. (JP)
Goto, H. (JP)
Kamikawa, S. (JP)
Andreev, Alexander V. (FZU-D) RID, ORCID
Gorbunov, D.I. (DE)
Henriques, Margarida Isabel Sousa (FZU-D)
Suzuki, T. (JP)Number of authors 8 Article number 012002 Source Title Journal of Physics: Conference series, 807. - Bristol: : IOP Publishing Ltd., 2017 - ISSN 1742-6588 Pages s. 1-5 Number of pages 5 s. Publication form Print - P Action International Conference on Strongly Correlated Electron Systems /18./ (SCES 2016) Event date 09.05.2016 - 13.05.2016 VEvent location Hangzhou Country CN - China Event type WRD Language eng - English Country GB - United Kingdom Keywords rare-earth intermetallics ; antiferromagnetism ; elastic properties Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GA16-03593S GA ČR - Czech Science Foundation (CSF) GA14-03276S GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 EID SCOPUS 85018290847 DOI 10.1088/1742-6596/807/1/012002 Annotation In the distorted kagome lattice antiferromagnet Dy 3 Ru 4 Al 12 with T N = 7 K, a crystal electric field (CEF) effect is expected at high temperatures. To investigate the CEF effect and the phase transition at T N , we performed ultrasonic measurements on a single-crystalline sample. At high temperatures, both the longitudinal elastic modulus C 11 and the transverse modulus C 44 increase monotonically with decreasing temperature. Below 60 K a characteristic elastic softening is observed in C 44 in contrast to C 11 with monotonic hardening down to T N . We analyzed C 44 using the Curie-Weiss-type equation and obtained a negative parameter: θ which is proportional to a quadrupole-quadrupole coupling constant under the hexagonal CEF. With further decreasing temperature, both moduli exhibit abrupt elastic hardening at T N due to a magnetostriction. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2018
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