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Microstructure and magnetic properties of Ni50 Mn37 Sn13 Heusler alloy ribbons

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

American Institute of Physics

Autor: Santos Rodríguez, Jesús Daniel
Sánchez Fernández, Tatiana
Álvarez, Pablo G.
Sánchez Rodríguez, M. Luisa
Sánchez Llamazares, José Luis
Hernando, Blanca
Escoda i Acero, Ma. Lluïsa
Suñol Martínez, Joan Josep
Varga, Rastislav
Resum: 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
Accés al document: http://hdl.handle.net/2072/101667
Llenguatge: eng
Editor: American Institute of Physics
Drets: Tots els drets reservats
Matèria: Aliatges
Estany -- Propietats magnètiques
Manganès -- Propietats magnètiques
Microestructura
Níquel -- Propietats magnètiques
Alloys
Manganese -- Magnetic properties
Nickel -- Magnetic properties
Tin -- Magnetic properties
Microstructure
Títol: Microstructure and magnetic properties of Ni50 Mn37 Sn13 Heusler alloy ribbons
Tipus: info:eu-repo/semantics/article
Repositori: Recercat

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