Ressonância Ferromagnética em Super-Redes NiFe/Ru
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2009-04-14
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Universidade Federal de Goiás
Resumo
The Ferromagnetic Resonance (FMR) technique was used to study the magnetic
anisotropy of NiFe/Ru multilayers. The FMR spectra and absorption fields of multilayers
with Ru layers thickness bellow 20 Å are the same as that of single monolayer
films. Evidence of the coupling between the magnetic layers also is given by the fact that
for the sample with Ru thickness equal to 7 Å, in normal configuration of the applied
static field, spin-wave resonance modes also are excited by the microwave field. The interlayer
coupling constant obtained is equal to 1, 1 £ 10¡7 erg/cm. For the set of samples
with different NiFe thicknees, the analysis of the effective magnetic anisotropy in terms of
volume and surface contributions, gives KV = 3, 4 £ 106 erg/cm3 and KS = 1, 2 erg/cm2.
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LANDI JUNIOR, Salmon. Ferromagnetic Resonance in Super-Lattice Nife/RU. 2009. 78 f. Dissertação (Mestrado em Ciências Exatas e da Terra) - Universidade Federal de Goiás, Goiânia, 2009.