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Thermal Annealing Influence on Magnetic and Structural Properties of Cu56Ga28Mn16 Microwires

Published online by Cambridge University Press:  31 January 2011

Víctor Prida ,
Victor Vega ,
Jose Sanchez Llamazares ,
Maria L Sanchez ,
Jesus D Santos ,
Blanca Hernando ,
Lluisa Escoda ,
Joan J Suñol ,
Carlos Garcia  and
Caroline Ross
Víctor Prida
Affiliation:
vmpp@uniovi.es, Universidad de Oviedo, Fisica, Calvo Sotelo s/n, Oviedo, Asturias, 33007, Spain
Victor Vega
Affiliation:
vegavictor@uniovi.es, Universidad de Oviedo, SCTs, Oviedo, Asturias, Spain
Jose Sanchez Llamazares
Affiliation:
sanchez@nanomagnetics.org, Universidad de Oviedo, Fisica, Calvo Sotelo s/n, Oviedo, Asturias, 33007, Spain
Maria L Sanchez
Affiliation:
mlsr@uniovi.es, Universidad de Oviedo, Fisica, Calvo Sotelo s/n, Oviedo, Asturias, 33007, Spain
Jesus D Santos
Affiliation:
jdsantos@uniovi.es, Universidad de Oviedo, Fisica, Calvo Sotelo s/n, Oviedo, Asturias, 33007, Spain
Blanca Hernando
Affiliation:
grande@uniovi.es
Lluisa Escoda
Affiliation:
lluisa.escoda@udg.cat, Universidad de Girona, Girona, Cataluña, Spain
Joan J Suñol
Affiliation:
joanjosep.sunyol@udg.edu, Universidad de Girona, Girona, Cataluña, Spain
Carlos Garcia
Affiliation:
carlosgg@MIT.EDU, MIT, Materials Science & Engineering, Cambridge, Massachusetts, United States
Caroline Ross
Affiliation:
caross@mit.edu, United States
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Abstract

We report on the crystalline structure, morphology and thermomagnetic properties of glass-coated magnetic microwires with Cu56Ga28Mn16 composition, as well as the thermal annealing influence on its magneto-structural properties. As-cast CuMnGa microwires exhibit a majority cubic B2 phase, and upon annealing at temperatures up to 573 K a new hexagonal phase appears coexisting with the cubic B2 major phase. Thermal annealing treatments also shift the Curie temperature about 150 K with respect to the one for the as-cast microwire. Furthermore, the signature of a structural phase transition is observed for the microwire annealed at 523 K

Keywords

annealingcrystallinemagnetic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1200: Symposium G – Magnetic Shape Memory Alloys , 2009 , 1200-G09-03
Copyright
Copyright © Materials Research Society 2010

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