Faculty of Humanities and Natural Sciences, University of Presov, UI. 17. Novembral, 080 01 Presov, Slovakia
P. Diko
Institute of Esperimental Physics, Watsonova 47, 040 01 Kosice, Slovakia
J. L. Sánchez Llamazares
Instituto Potosino de Investigación Científica y Tecnológica A.C., Camino a la Presa de San José 2055, Col. Lomas 4a, San Luis Potosí S.L.P. 78216, Mexico
We report the structural, magnetic, and magnetocaloric characterization of glass-coated Ni42.9Mn37.1Sn20.0 microwires produced by the Taylor-Ulitovsky method. Microwire samples crystallized into a single-phase austenite with the L21-type crystal structure (space group Fm3̄m, lattice parameter a ≈ 6.02 Å) and a Curie temperature of 349 K. A distinctive feature of the produced microwires is that saturation magnetization is reached at a very low magnetic field (∼0.15 T). For a magnetic field change of 3 T, the produced microwires showed a reversible maximum magnetic entropy change |ΔSM|max of 2.3 J kg−1 K−1 and a refrigerant capacity of 197 J kg−1, which are similar to the values reported by other austenitic NiMnSn alloys produced by rapid quenching techniques.
