Spin-wave excitations in ribbon-shaped Fe nanoparticles | Zendy

P. Crespo | Zendy; J. M. González | Zendy; A. Hernando | Zendy; Félix Ynduráin | Zendy

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Spin-wave excitations in ribbon-shaped Fe nanoparticles

Author(s) -

P. Crespo,

J. M. González,

A. Hernando,

Félix Ynduráin

Publication year - 2004

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.69.012403

Subject(s) - ribbon , condensed matter physics , magnetization , magnon , materials science , spin wave , spin (aerodynamics) , thermal , nanoscopic scale , physics , ferromagnetism , nanotechnology , magnetic field , thermodynamics , quantum mechanics , composite material

It has been found that in highly anisometric ribbon-shaped Fe particles with nanoscale dimensions that the magnetization decreases with temperature markedly faster than in bulk bcc Fe. This anomalous dependence, which becomes more remarkable as the length-to-cross section ratio increases, arises from the elongated shape of the particles. The analytical approximation performed on the thermal spectrum of magnons, compatible with the sample dimensions, unravels the correlated influences of shape and size on the thermal decreasing rate of magnetization

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