Critical angular dependance of the polarising field on the magnetoelastic dynamics near the SRT in TbFe/FeCo multilayers

Nicolas Tiercelin (1) , Vladimir Preobrazhensky (1) , Jamal Ben Youssef (2) , Philippe Pernod (1) , Henri Le Gall (2)

1 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
2 LMB - Laboratoire de magnétisme de Bretagne

Summary form only given. We reflect the results of the latest investigations on giant magnetostrictive multilayers in which a field induced spin reorientation transition (SRT) is used to develop new ways of control for magnetostrictive MEMS such as the possibility of "sub-harmonic" excitation. During the study of the SRT, experiments showed the existence of an extra singularity when decreasing the polarising field towards negative values. Calculations showed a critical sensitivity of the excitation levels on the alignment of the polarising field. We study in detail the influence of this alignment on near SRT magnetoelastic dynamics.

Mots clés: Polarization; Magnetostriction; Magnetic multilayers; Magnetic resonance; Vibration measurement; Electronic mail; Micromechanical devices; Magnetic field measurement; Tuning; Resonant frequency

Domaines: Sciences de l'ingénieur [physics]

Nicolas Tiercelin, Vladimir Preobrazhensky, Jamal Ben Youssef, Philippe Pernod, Henri Le Gall. Critical angular dependance of the polarising field on the magnetoelastic dynamics near the SRT in TbFe/FeCo multilayers. IEEE International Magnetics Conference, Intermag Europe 2002, Apr 2002, Amsterdam, Netherlands. pp.AS4, ⟨10.1109/INTMAG.2002.1000721⟩. ⟨hal-00250218⟩