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Microstructure and magnetic properties of Ni50 Mn37 Sn13 Heusler alloy ribbons Santos Rodríguez, Jesús Daniel Sánchez Fernández, Tatiana Álvarez-Alonso, Pablo Sánchez Rodríguez, M. Luisa Sánchez Llamazares, José Luis Hernando, Blanca Escoda i Acero, Ma. Lluïsa Suñol Martínez, Joan Josep Varga, Rastislav Aliatges Estany -- Propietats magnètiques Manganès -- Propietats magnètiques Microestructura Níquel -- Propietats magnètiques Alloys Manganese -- Magnetic properties Nickel -- Magnetic properties Tin -- Magnetic properties Microstructure The Heusler alloy Ni50 Mn37 Sn13 was successfully produced as ribbon flakes of thickness around 7-10 μm melt spinning. Fracture cross section micrographs in the ribbon show the formation of a microcrystalline columnarlike microstructure, with their longer axes perpendicular to the ribbon plane. Phase transition temperatures of the martensite-austenite transformation were found to be MS =218 K, Mf =207 K, AS =224 K, and Af =232 K; the thermal hysteresis of the transformation is 15 K. Ferromagnetic L 21 bcc austenite phase shows a Curie point of 313 K, with cell parameter a=0.5971 (5) nm at 298 K, transforming into a modulated 7M orthorhombic martensite with a=0.6121 (7) nm, b=0.6058 (8) nm, and c=0.5660 (2) nm, at 150 K 2008 info:eu-repo/semantics/article Santos, J.D., Sánchez, T., Álvarez, P., Sánchez, M.L., Llamazares, J.L.S., Hernándo, B., Escoda, Ll., Suñol, J.J. i Varga, R. (2008). Microstructure and magnetic properties of Ni50 Mn37 Sn13 Heusler alloy ribbons. Journal of Applied Physics, 103 (7), 07B326. Recuperat 7 febrer 2011, a http://link.aip.org/link/JAPIAU/v103/i7/p07B326/s1 http://hdl.handle.net/10256/3225 http://hdl.handle.net/10256/3225 eng info:eu-repo/semantics/altIdentifier/doi/10.1063/1.2832330 info:eu-repo/semantics/altIdentifier/issn/0021-8979 info:eu-repo/semantics/altIdentifier/eissn/1089-7550 Tots els drets reservats info:eu-repo/semantics/openAccess application/pdf American Institute of Physics © Journal of Applied Physics, 2008, vol. 103, núm. 7 Articles publicats (D-F)