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Structural and magnetic properties of Co2MnSi thin films

Article dans une revue avec comité de lecture
Author
BELMEGUENAI, M
233425 Laboratoire des Sciences des Procédés et des Matériaux [LSPM]
ZIGHEM, F
233425 Laboratoire des Sciences des Procédés et des Matériaux [LSPM]
FAURIE, D
233425 Laboratoire des Sciences des Procédés et des Matériaux [LSPM]
TUZCUOGLU, H.
233425 Laboratoire des Sciences des Procédés et des Matériaux [LSPM]
CHERIF, Salim Mourad
233425 Laboratoire des Sciences des Procédés et des Matériaux [LSPM]
WESTERHOLT, K
145684 Institut für Festkörperphysik
SEILER, Wilfrid
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
MOCH, P
233425 Laboratoire des Sciences des Procédés et des Matériaux [LSPM]

URI
http://hdl.handle.net/10985/9916
DOI
10.1002/pssa.201228039
Date
2012
Journal
physica status solidi (c)

Abstract

Co2MnSi (CMS) films of different thicknesses (20, 50, and 100 nm) were grown by radio frequency (RF) sputtering on a-plane sapphire substrates. Our X-rays diffraction (XRD) study shows that, in all the samples, the cubic 〈110〉 CMS axis is normal to the substrate and that six well defined preferential in-plane orientations are present. Static and dynamic magnetic properties were investigated using vibrating sample magnetometry (VSM) and microstrip line ferromagnetic resonance (MS-FMR), respectively. From the resonance measurements versus the direction and the amplitude of an applied magnetic field, most of the magnetic parameters are derived, i.e.: the magnetization, the gyromagnetic factor, the exchange stiffness coefficient, and the magnetic anisotropy terms. The in-plane anisotropy results from the superposition of two terms showing a twofold and a fourfold symmetry, respectively. The observed behavior of the hysteresis loops is in agreement with this complex form of the in-plane anisotropy.

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