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Multifrequency magnetic resonance and blocking behavior of Fe x Pt 1– x nanoparticles
Author(s) -
Antoniak C.,
Lindner J.,
SalgueiriñoMaceira V.,
Farle M.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200567114
Subject(s) - blocking (statistics) , anisotropy , nanoparticle , ferromagnetic resonance , condensed matter physics , relaxation (psychology) , materials science , magnetometer , resonance (particle physics) , ferromagnetism , magnetic anisotropy , nuclear magnetic resonance , analytical chemistry (journal) , magnetic field , chemistry , magnetization , nanotechnology , physics , atomic physics , optics , psychology , social psychology , statistics , mathematics , quantum mechanics , chromatography
Multifrequency ferromagnetic resonance well above the blocking temperature was used to determine the composition dependent g ‐factor in wet‐chemically synthesized Fe x Pt 1– x nanoparticles with mean diameters around 3 nm. The magnetic relaxation process in these experiments is found to be non‐Gilbert like. To obtain the blocking temperature and the effective anisotropy, zero‐field‐cooled magnetometry data are simulated using a model of non‐interacting particles. In this simulation, the temperature dependence of the effective anisotropy has to be taken into account for accurate results. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)