Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/329862
Type: Artigo
Title: Magnetic And Magnetocaloric Properties Of Dymn2si2 Compound With Multiple Magnetic Phase Transition
Magnetic and magnetocaloric properties of DyMn2Si2 compound with multiple magnetic phase transition
Author: Reis, D. C. dos
Franca, E. L. T.
Paula, V. G. de
Santos, A. O. dos
Coelho, A. A.
Cardoso, L. P.
Silva, L. M. da
Abstract: Structural, magnetic and magnetocaloric properties of the ternary intermetallic compound DyMn2Si2 are studied by X-ray diffraction and magnetization measurements. It is found that DyMn2Si2 crystalizes with tetragonal ThCr2S2-type structure and exhibits four successive magnetic transitions at low temperature, around 20 K, 31 K, 38 K and 82 K, named respectively as T-1, T-2, T-3 and T-4 transitions. Large values of magnetic field (> 35 kOe) favor antiferromagnetic clusters and give rise to exchange bias effect. The different responses of T-2 and T3 to field change, induces two non-identical isothermal entropy change (-Delta S-M) peaks. The maximum values of -Delta S-M occur in temperatures around T-3 and reaches 8.2 J/kgK, for a magnetic field change of 50 kOe. Also, the presence of transitions T-2 and T-3 close to each other induces a table-like magnetocaloric effect (MCE) in a wide temperature range. Thus, the peculiar magnetic properties observed for DyMn2Si2 compound are interesting for low temperature magnetic refrigeration.
Structural, magnetic and magnetocaloric properties of the ternary intermetallic compound DyMn2Si2 are studied by X-ray diffraction and magnetization measurements. It is found that DyMn2Si2 crystalizes with tetragonal ThCr2S2-type structure and exhibits four successive magnetic transitions at low temperature, around 20 K, 31 K, 38 K and 82 K, named respectively as T-1, T-2, T-3 and T-4 transitions. Large values of magnetic field (> 35 kOe) favor antiferromagnetic clusters and give rise to exchange bias effect. The different responses of T-2 and T3 to field change, induces two non-identical isothermal entropy change (-Delta S-M) peaks. The maximum values of -Delta S-M occur in temperatures around T-3 and reaches 8.2 J/kgK, for a magnetic field change of 50 kOe. Also, the presence of transitions T-2 and T-3 close to each other induces a table-like magnetocaloric effect (MCE) in a wide temperature range. Thus, the peculiar magnetic properties observed for DyMn2Si2 compound are interesting for low temperature magnetic refrigeration.
Subject: Magnetocaloric Effect
Multiple Phase Transition
Exchange Bias Effect
Efeito magnetocalórico
Country: Holanda
Editor: Elsevier
Citation: Journal Of Magnetism And Magnetic Materials. Elsevier Science Bv, v. 424, p. 84 - 88, 2017.
Rights: fechado
Identifier DOI: 10.1016/j.jmmm.2016.10.019
Address: https://www.sciencedirect.com/science/article/pii/S0304885316324556
Date Issue: 2017
Appears in Collections:IFGW - Artigos e Outros Documentos

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