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Magnetic and magnetoelastic properties of UCo2Si2 as studied by high-field magnetization and ultrasound measurements
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SYSNO ASEP 0394491 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Magnetic and magnetoelastic properties of UCo2Si2 as studied by high-field magnetization and ultrasound measurements Author(s) Andreev, Alexander V. (FZU-D) RID, ORCID
Yasin, S. (DE)
Skourski, Y. (DE)
Zvyagin, A.A. (DE)
Zherlitsyn, S. (DE)
Wosnitza, J. (DE)Source Title Physical Review. B - ISSN 1098-0121
Roč. 87, č. 21 (2013), "214409-1"-"214409-8"Number of pages 8 s. Language eng - English Country US - United States Keywords uranium intermetallics ; single crystals ; antiferromagnetism ; high fields ; acoustics ; magnetoelasticity Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GAP204/12/0150 GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000320164100001 DOI 10.1103/PhysRevB.87.214409 Annotation We investigated antiferromagnet UCo2Si2 by magnetization and ultrasound measurements in pulsed magnetic fields up to 60 T. It is found that the crystal UCo2Si2, which has the AF type-I magnetic structure in zero field below TN=83 K, undergoes the metamagnetic phase transition to ferrimagnetic structure ++- type. The transition occurs when the magnetic field is applied along the c axis at 45 T (at 1.5 K). The transition is extremely sharp and exhibits a small but non-negligible hysteresis. With increasing temperature, it becomes broader and vanishes at TN. In ultrasound measurements, the transition appears as anomalies in the sound velocity and attenuation. Our analysis suggests that the low-temperature changes in the sound velocity and attenuation are determined by exchange renormalization caused by the sound waves. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2014
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