TY - GEN
T1 - Structural and magnetic phenomena in NIMNGA/substrate thin films composites
AU - Chernenko, V. A.
AU - Besseghini, S.
AU - Recarte, V.
AU - Lopez Anton, R.
AU - Gambardella, A.
AU - Barandiaran, J. M.
AU - Ohtsuka, M.
PY - 2009
Y1 - 2009
N2 - Transfomiation behavior, structural and magnetic phenomena in two thin film series of Ni50.3Mn21.8Ga21.4Fe 6.5/alumina (F1) and Ni51.4Mn28.3Ga 20.3/Mo (F2) composites are studied by means of X-rays, electrical resistivity, various magnetic and dynamical mechanical experiments. Thin films with thicknesses in the range of 0.1 - 5 μm have been deposited on substrates at 50 °C by r.f. magnetron sputtering and subsequently annealed at 800 °C for 1h. Each film in both series is 220-fiber textured. The results show that F2 films are martensitic at room temperature, while Fl films are in the austenite state. Contrary to F2 films, the Fl films demonstrate a considerable thickness dependence of the martensitic transformation temperature in the submicron range. In-plane and out-of-plane magnetic properties of films proved to be thickness-dependent not only in the martensitic state but also in austenite. Due to martensitic transformation, film composites demonstrate elastic anomalies in the dynamic bending or tensile temperature-dependent tests.
AB - Transfomiation behavior, structural and magnetic phenomena in two thin film series of Ni50.3Mn21.8Ga21.4Fe 6.5/alumina (F1) and Ni51.4Mn28.3Ga 20.3/Mo (F2) composites are studied by means of X-rays, electrical resistivity, various magnetic and dynamical mechanical experiments. Thin films with thicknesses in the range of 0.1 - 5 μm have been deposited on substrates at 50 °C by r.f. magnetron sputtering and subsequently annealed at 800 °C for 1h. Each film in both series is 220-fiber textured. The results show that F2 films are martensitic at room temperature, while Fl films are in the austenite state. Contrary to F2 films, the Fl films demonstrate a considerable thickness dependence of the martensitic transformation temperature in the submicron range. In-plane and out-of-plane magnetic properties of films proved to be thickness-dependent not only in the martensitic state but also in austenite. Due to martensitic transformation, film composites demonstrate elastic anomalies in the dynamic bending or tensile temperature-dependent tests.
KW - Ferromagnetic shape memory alloys
KW - Magnetic structure
KW - Martensitic transformation
KW - Ni-Mn-Ga/substrate thin film composites
UR - http://www.scopus.com/inward/record.url?scp=77957885608&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77957885608&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:77957885608
SN - 9780873397452
T3 - Proceedings of the International Conference on Martensitic Transformations, ICOMAT-08
SP - 459
EP - 464
BT - Proceedings of the International Conference on Martensitic Transformations, ICOMAT-08
T2 - 12th International Conference on Martensitic Transformations, ICOMAT-08
Y2 - 29 June 2008 through 5 July 2008
ER -