Dynamic transverse susceptibility in Au-Fe-Au "nano-onions"

Preprint

19 April 1999

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9904267

Abstract

A precision radio-frequency (RF) transverse modulation technique based on a resonant tunnel diode oscillator (TDO) has been used to study the dynamic susceptibility in novel ring-shaped single domain Fe nanoparticles synthesized using reverse-micelle chemistry. Hysteresis loops measured using a SQUID magnetometer indicate a large coercivity (Hc = 400Oe) below the blocking temperature (TB ~52K). The dynamic susceptibility shows remarkable consistency with the M-H data and exhibits peaks at characteristic anisotropy fields. Overall, these RF experiments are well suited to probe the magnetic anisotropy in nanophase materials.

Keywords

DYNAMIC SUSCEPTIBILITY
MAGNETIC ANISOTROPY
HYSTERESIS LOOPS
SUSCEPTIBILITY
COERCIVITY
ONIONS
FE AU

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Version 1, 1999-04-19, ArXiv

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