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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Magnetic and magnetoelastic properties of UCo2Si2 as studied by high-field magnetization and ultrasound measurements Tvůrce(i) Andreev, Alexander V. (FZU-D) RID, ORCID
Yasin, S. (DE)
Skourski, Y. (DE)
Zvyagin, A.A. (DE)
Zherlitsyn, S. (DE)
Wosnitza, J. (DE)Zdroj.dok. Physical Review. B - ISSN 1098-0121
Roč. 87, č. 21 (2013), "214409-1"-"214409-8"Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova uranium intermetallics ; single crystals ; antiferromagnetism ; high fields ; acoustics ; magnetoelasticity Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP GAP204/12/0150 GA ČR - Grantová agentura ČR Institucionální podpora FZU-D - RVO:68378271 UT WOS 000320164100001 DOI 10.1103/PhysRevB.87.214409 Anotace 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. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2014
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