Portal de Periódicos da CAPES

Ferromagnetic resonance in nickel around the curie temperature

1981; Elsevier BV; Volume: 42; Issue: 8 Linguagem: Inglês

10.1016/0022-3697(81)90121-9

1879-2553

S. Haraldson, Lars Winkler Pettersson,

Theoretical and Computational Physics

The ferromagnetic resonance behaviour of nickel up to and above Tc is investigated. It is shown that up to the Curie point, which is 357.8°C, the resonance can be described by the Gilbert equation with the parameters g = 2.20 ±0.02 and λ = (4.0±0.5) × 109s−1. Above Tc, however, it is an open question if the Gilbert equation describes the resonance adequately. No sign of a decreasing linewidth above 365°C is seen. On the contrary, the resonance broadens rapidly and fades away. The experiment is performed in a new way with the cavity kept at room temperature and the temperature of the sample is monitored during the run of the spectrum.