http://www.cnr.it/ontology/cnr/individuo/prodotto/ID281853

Epitaxial Ni-Mn-Ga/MgO(100) thin films ranging in thickness from 10 to 100 nm (Articolo in rivista)

Type

Label

Epitaxial Ni-Mn-Ga/MgO(100) thin films ranging in thickness from 10 to 100 nm (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

Ranzieri, Paolo; Fabbrici, Simone; Nasi, Lucia; Righi, Lara; Casoli, Francesca; Chernenko, Volodymyr A.; Villa, Elena; Albertini, Franca (2013)
Epitaxial Ni-Mn-Ga/MgO(100) thin films ranging in thickness from 10 to 100 nm
in Acta materialia; PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Ranzieri, Paolo; Fabbrici, Simone; Nasi, Lucia; Righi, Lara; Casoli, Francesca; Chernenko, Volodymyr A.; Villa, Elena; Albertini, Franca (literal)

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

Note

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

a IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy; b MIST E-R Laboratory, via Gobetti 101, 40129 Bologna, Italy; c Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Università di Parma, Viale G. Usberti 17/A, 43124 Parma, Italy; d Universidad del País Vasco, Departamento de Electricidad y Electronica, PO Box 644, Bilbao 48080, Spain; e Ikerbasque, Basque Foundation for Science, Bilbao 48011, Spain; f IENI-CNR, Corso Promessi Sposi, 29, Lecco 23900, Italy (literal)

Titolo

Epitaxial Ni-Mn-Ga/MgO(100) thin films ranging in thickness from 10 to 100 nm (literal)

Abstract

Thin films of Ni-Mn-Ga alloy ranging in thickness from 10 to 100 nm have been epitaxially grown on MgO(1 0 0) substrate. Temperature-dependent X-ray diffraction measurements combined with room-temperature atomic force microscopy and transmission electron microscopy highlight the structural features of the martensitic structure from the atomic level to the microscopic scale, in particular the relationship between crystallographic orientations and twin formation. Depending on the film thickness, different crystallographic and microstructural behaviours have been observed: for thinner Ni-Mn-Ga films (10 and 20 nm), the L2(1) austenitic cubic phase is present throughout the temperature range being constrained to the substrate. When the thickness of the film exceeds the critical value of 40 nm, the austenite-to-martensite phase transition is allowed. The martensitic phase is present with the unique axis of the pseudo-orthorhombic 7M modulated martensitic structure perpendicular to the film plane. A second critical thickness has been identified at 100 am where the unique axis has been found both perpendicular and parallel to the film plane. Magnetic force microscopy reveals the out-of-plane magnetic domain structure for thick films. For the film thickness below 40 nm, no magnetic contrast is observed, indicating an in-plane orientation of the magnetization. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. (literal)

Editore