Journal de Physique III

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DOI: 10.1051/jp3:1994205
J. Phys. III France 4 (1994) 1335-1340

FMR studies of cobalt-based amorphous ribbons ; effect of the temperature

E. Saint-Christophe¹, R. Barrue² and J. C. Perron³

¹ Laboratoire IXL, Université de Bordeaux I, 351 cours de la Libération, 33405 Talence Cedex, France
² L.E.S.I.R., E.N.S. de Cachan, 61 av. du Pdt Wilson, 94235 Cachan Cedex, France
³ Laboratoire de Génie Electrique de Paris, associé au C.N.R.S., N$^{\circ}$ 127, Plateau du Moulon, 91190 Gif-sur-Yvette, France

(Received 9 March 1993, revised 1 March 1994, accepted 12 April 1994)

Abstract
The aim of this study is to point out the magnetic behaviour of cobalt-based amorphous conductors from ferromagnetic resonance measurements. From our data, linewidth $\Delta H$ , position H₀, and amplitude $(\Delta r/r)_{\max}$ of the resonance peak and values of the flattening factor K, we determine the g-factor (or Landé factor), the damping parameter $\lambda$ , the transverse relaxation time T₂ as well as the maximum variations $\Delta\mu^_{\rm M}$ , $\Delta\mu^{'}_{\rm M}$ and $\Delta\mu^{'}_{\rm m}$ of the relative magnetic permeability $\mu = \mu^{'} - j\mu^$ . Then we determine the role played by the temperature.