236 articles – 3604 Notices  [english version]
HAL : in2p3-00702502, version 1

Fiche concise  Récupérer au format
Energetic ion irradiation induced crystallization of Ni-Mn-Sn ferromagnetic shape memory alloy thin film
Vishnoi R., Singhal R., Asokan K., Pivin J.C., Kanjilal D. et al
Vacuum 89 (2012) 190-196 - http://hal.in2p3.fr/in2p3-00702502
Physique/Matière Condensée/Science des matériaux
Energetic ion irradiation induced crystallization of Ni-Mn-Sn ferromagnetic shape memory alloy thin film
R. Vishnoi, R. Singhal, K. Asokan, J.C. Pivin1, D. Kanjilal, D. Kaur
1 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
http://www-csnsm.in2p3.fr/
CNRS : UMR8609 – IN2P3 – Université Paris XI - Paris Sud
batiments 104 et 108 - 91405 Orsay Campus
France
CSNSM PCI
The ion irradiation induced crystallization of Ni-Mn-Sn ferromagnetic shape memory alloy (FSMA) thin film is investigated. Thin films of Ni-Mn-Sn FSMA synthesized by DC magnetron sputtering on Si substrate at 200 °C are irradiated by a beam of 120 MeV Ag ions at different fluence varying from 1 x 1012 to 6 x 1012 ions/cm2. X-ray diffraction (XRD) pattern reveals that the pristine film grows in L21 cubic austenite phase with poor crystallinity and crystallinity of the film improves with increasing ion fluence, which is attributed to the strain relaxation by the energy deposited by incoming ions and promotes the grain growth. Grain growth is further confirmed by Atomic force microscopy (AFM). The temperature dependent magnetization measurements show improvement in the magnetic and shape memory properties of the films with increasing fluence, which is ascribed to the ordering of austenite phase. Nanoindentation measurements show that with increasing fluence of 120 MeV Ag ions, films exhibit a greater stiffness and smaller tendency towards plastic deformation.

Articles dans des revues avec comité de lecture
2012
Vacuum
Publisher Elsevier
ISSN 0042-207X 
89
190-196

CSNSM PCI
Ferromagnetic shape memory alloy – Ion irradiation – Ion track