Martensitic transitions and the nature of ferromagnetism in the austenitic and martensitic states of Ni-Mn-Sn alloys


Autoria(s): Krenke, Thorsten; Acet, Mehmet; Wassermann, Eberhard F.; Moya Raposo, Xavier; Mañosa, Lluís; Planes Vila, Antoni
Data(s)

28/12/2009

28/12/2009

2005

Resumo

Structural and magnetic transformations in the Heusler-based system Ni0.50Mn0.50¿xSnx are studied by x-ray diffraction, optical microscopy, differential scanning calorimetry, and magnetization. The structural transformations are of austenitic-martensitic character. The austenite state has an L21 structure, whereas the structures of the martensite can be 10M , 14M , or L10 depending on the Sn composition. For samples that undergo martensitic transformations below and around room temperature, it is observed that the magnetic exchange in both parent and product phases is ferromagnetic, but the ferromagnetic exchange, characteristic of each phase, is found to be of different strength. This gives rise to different Curie temperatures for the austenitic and martensitic states.

Formato

9 p.

application/pdf

Identificador

0163-1829

http://hdl.handle.net/2445/10557

540290

Idioma(s)

eng

Publicador

The American Physical Society

Relação

Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.72.014412

Physical Review B, 2005, vol. 72, núm. 1, p. 14412-1-14412-9

Direitos

(c) The American Physical Society, 2005

info:eu-repo/semantics/openAccess

Palavras-Chave #Transformacions martensítiques #Ferromagnetisme #Aliatges #Martensitic transformations #Ferromagnetism #Alloys
Tipo

info:eu-repo/semantics/article