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Type: Artigo
Title: Large magnetocaloric effect in ErCoSn driven by metamagnetic phase transition and short-range ferromagnetic correlations
Author: Souza, R. L.
Monteiro, J. C. B.
Santos, A. O. dos
Cardoso, L. P.
Silva, L. M. da
Abstract: Here, we report the results of structural, magnetic, thermal and magnetocaloric properties of ErCoSn compound. The compound undergoes an antiferromagnetic (AFM) ordering around T-N = 4.6 K and magnetic correlation is observed above T-N, up to T = 11 K. Below T-N, a spin-glass state was observed for ErCoSn due to an apparent coexistence of ferromagnetic (FM) interaction with long-range AFM order. External applied magnetic field induces a first-order-like metamagnetic phase transition from AFM to FM state that is responsible for the large values of the maximum isothermal entropy change (-Delta(max)(M) = 16.5 J/kgK@50kOe) and adiabatic temperature change (Delta T-ad = 8.2 K). Furthermore, short-range ferromagnetic correlation above T-N contributes to the widening of -Delta S-M and Delta T-ad peaks as well as the increase of the ErCoSn compound refrigerant capacity. The results indicate attractive properties of this compound for magnetic refrigeration at cryogenic temperatures.
Subject: Efeito magnetocalórico
Transição de fase
Materiais ferromagnéticos
Magnetocaloric effect
Phase transition
Ferromagnetic materials
Country: Holanda
Editor: Elsevier
Rights: fechado
Identifier DOI: 10.1016/j.jmmm.2019.165653
Date Issue: 2019
Appears in Collections:IFGW - Artigos e Outros Documentos

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