Epitaxial Ni-Mn-Ga/MgO(1 0 0) thin films ranging in thickness from 10 to 100 nm (Articolo in rivista)

Type
Label
  • Epitaxial Ni-Mn-Ga/MgO(1 0 0) thin films ranging in thickness from 10 to 100 nm (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.actamat.2012.09.056 (literal)
Alternative label
  • Ranzieri P.; Fabbrici S.; Nasi L.; Righi L.; Casoli F.; Chernenko V.A.; Villa E.; Albertini F. (2013)
    Epitaxial Ni-Mn-Ga/MgO(1 0 0) thin films ranging in thickness from 10 to 100 nm
    in Acta materialia (Online)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ranzieri P.; Fabbrici S.; Nasi L.; Righi L.; Casoli F.; Chernenko V.A.; Villa E.; Albertini F. (literal)
Pagina inizio
  • 263 (literal)
Pagina fine
  • 272 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S1359645412006891 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 61 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 1 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1-3,5,8 : IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy / 2 : MIST E-R Laboratory, via Gobetti 101, 40129 Bologna, Italy / 4 : Dipartimento di Chimica Generale Ed Inorganica, Chimica Analitica, Chimica Fisica, Università di Parma, Viale G. Usberti 17/A, 43124 Parma, Italy / 6 : Universidad Del País Vasco, Departamento de Electricidad y Electronica, PO Box 644, Bilbao 48080, Spain / 6 : Ikerbasque, Basque Foundation for Science, Bilbao 48011, Spain / 7 : IENI-CNR, Corso Promessi Sposi, 29, Lecco 23900, Italy (literal)
Titolo
  • Epitaxial Ni-Mn-Ga/MgO(1 0 0) 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 nm 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. (literal)
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