Microstructure and magnetocaloric properties of melt-extracted La–Fe–Si microwires

• Published in: Journal of magnetism and magnetic materials 2014-05, Vol.357, p.73-76
• Main Authors: Dong, J.D., Yan, A.R., Liu, J.
• Format: Article
• Language: English
• Subjects: Annealing; Bulk sampling; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Equivalence; Exact sciences and technology; La–Fe–Si microwires; Magnetic materials; Magnetic properties; Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Magnetism; Magnetocaloric effect; Magnetocaloric effect, magnetic cooling; Melt-extraction; Microstructure; Physics; Refrigerants; Wire
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2014.01.031

LaFe11.6Si1.4 microwires with an average diameter of 50μm have been fabricated by utilizing the melt-extraction method. The geometry of wires fits the requirement of magnetic refrigerants when applied in active magnetic regenerator (AMR) systems. Magnetocaloric properties of these wires are comparable to those for the bulk sample with the equivalent NaZn13-type phase (i.e. the 1:13 phase), making them the promising refrigerants toward application. •LaFe11.6Si1.4 microwires were fabricated by utilizing the melt-extraction method.•The wires have an average diameter of 50μm.•The geometry of wires fits the requirement of application in AMR systems.•Microstructure and Magnetocaloric properties of these wires were studied.•A large entropy change of 9.0J/kgK was obtained for the wires with the 1:13 phase of about 76vol%.