Ferromagnetic resonance in thin films submitted to multiaxial stress state: application of the uniaxial equivalent stress concept and experimental validation. (26th May 2016)

• Record Type: Journal Article
• Authors: Gueye, M; Zighem, F; Belmeguenai, M; Gabor, M; Tiusan, C; Faurie, D
• Is Part Of: Journal of physics. Volume 49:Number 26(2016)
• Publication Date: 2016-05-26
• Subjects: ferromagnetic resonance -- magnetoelasticity -- thin films; Physics -- Periodicals; 530
• DOI: 10.1088/0022-3727/49/26/265001
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: In this paper a unique expression of the anisotropy field induced by any multiaxial stress state in a magnetic thin film and probed by ferromagnetic resonance is derived. This analytical development has been made using the uniaxial equivalent stress concept, for which correspondances between definitions given by different authors in the literature is found. The proposed model for the anisotropy field has been applied to C o 2 F e A l thin films (25 nm) stressed both by piezoelectric actuation (non-equi-biaxial) or by bending tests (uniaxial) and measured with a broadband ferromagnetic resonance technique. The overall exprimental data can be easily plotted on a unique graph from which the magnetostriction coefficient has been estimated.