Activation volumes in superparamagnetic Fe films determined using Brillouin Light scattering

Author

Stamps, R. ; Stollo, A. ; Tacchi, M. ; Carlotti, G. ; Gubbiotti, G. ; Fabrizioli, M. ; Fujii, J.

Author_Institution

Western Australia Univ., Crawley

fYear

2006

fDate

8-12 May 2006

Firstpage

172

Lastpage

172

Abstract

Ultra-thin films of Fe grown in ultra-high-vacuum on GaAs (100) were studied using Brillouin light scattering. The films are not continuous but instead a collection of weakly interacting particles and are paramagnetic at room temperature. Spinwave frequency measurements can be used to determine anisotropies above the blocking temperature. In this paper, the authors show that temperature dependence can be used to provide a unique measure of particle volume.

Keywords

Brillouin spectra; ferromagnetic materials; iron; magnetic anisotropy; magnetic particles; magnetic thin films; paramagnetic materials; spin waves; superparamagnetism; Brillouin light scattering; Fe; GaAs; GaAs (100); activation volume; magnetic anisotropy; paramagnetic films; particle volume; spin wave frequency; superparamagnetic iron ultrathin film; temperature 293 K to 298 K; ultrahigh-vacuum growth; weakly interacting particles; Anisotropic magnetoresistance; Brillouin scattering; Frequency measurement; Gallium arsenide; Iron; Light scattering; Paramagnetic materials; Particle measurements; Temperature dependence; Volume measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.375672

Filename

4261606