Magnetic properties of Ni81Fe19/W90Ti10 multilayer films

 

Z. Yamkane1*, H. Lassri1, M. Lassri1, M. Abid2, A. Menai1, E. Baggio-Saitovitch3

1 Laboratoire de Physique des Matériaux, Micro-électronique, Automatique et thermique,  Faculté des Sciences Ain Chock, Université Hassan II, B.P. 5366 Mâarif, Route d’El Jadida, km-8, Casablanca, Morocco.

2 LPTA, Université Hassan II - Casablanca, Faculté des Sciences, B.P. 5366 Maârif, Maroc

3Centro Brasileiro de Pesquisas Fisicas, Rua Xavier Sigaud 150, Rio de Janeiro, Brazil

* Corresponding author. E-mail: zinebyamkane@yahoo.fr

Received: 27 April 2012; revised version accepted: 30 May 2012

 

Abstract

     Magnetic properties of Ni81Fe19/W90Ti10 multilayer films, prepared by DC magnetron sputtering, have been studied by vibrating sample magnetometer and ferromagnetic resonance (FMR). Spin-wave resonances were observed in Ni81Fe19/W90Ti10 multilayer films in FMR experiments and the spin wave was found to be sustained by both the whole films. Estimated small interlayer coupling constant shows weak exchange coupling effect between Ni81Fe19  layers across W90Ti10 spacers. The FMR linewidth, in parallel geometry, of the uniform mode was found to increase with decreasing NiFe thickness (20Å £ tNiFe £ 100Å) indicating that it corresponds to an interfacial effect.

 

Keywords:  NiFe/WTi multilayers; Ferromagnetic resonance; Spin-waves; Interlayer coupling.

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