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Magnetocaloric effect of Er.sub.5./sub.Si.sub.4./sub. under hydrostatic pressure
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SYSNO ASEP 0327346 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Magnetocaloric effect of Er5Si4 under hydrostatic pressure Title Magnetokalorický jev ve sloučenině Er5Si4 za hydrostatického tlaku Author(s) Arnold, Zdeněk (FZU-D) RID, SAI, ORCID
Magen, C. (ES)
Morellon, L. (ES)
Algarabel, P.A. (ES)
Kamarád, Jiří (FZU-D) RID, ORCID
Ibarra, M. R. (ES)
Pecharsky, V. K. (US)
Gschneidner, Jr., K. A. (US)Number of authors 8 Source Title Physical Review. B - ISSN 1098-0121
Roč. 79, č. 14 (2009), 144430/1-144430/6Number of pages 6 s. Language eng - English Country US - United States Keywords Curie temperature ; entropy ; erbium compounds ; ferromagnetic materials ; high-pressure solid-state phase transformations ; magnetisation ; magnetocaloric Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA202/09/0030 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000265943200092 DOI 10.1103/PhysRevB.79.144430 Annotation The magnetocaloric effect (MCE) of the compound Er5Si4 has been investigated as a function of the applied magnetic field (up to 50 kOe) and the hydrostatic pressure (from ambient pressure up to 9 kbar). At constant magnetic field change, increasing the pressure up to 1.4 kbar induces a global rise of the magnetic entropy change |ΔSmag|, with the peak at TC ~ 30 K growing from 14.9 to 20.1 J/kg K. Between 1.4 and 9 kbar, the size and shape of the |ΔSmag| VS T curve remain nearly constant but the peak moves to higher temperatures and stabilizes above 3.5 kbar at T ~ 36 K. The increase in the magnetic entropy change occurs because of a modification of the magnetic coupling derived from the differences in the interlayer bonding in the M and O(I) states. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2010
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