1999/04/19 by H. Srikanth, Everett E. Carpenter, Srikanth, H. +5
Engineering · Physics and Astronomy · #Magnetic properties of thin films #Molecular Junctions and Nanostructures #Semiconductor materials and interfaces #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/9904267
PDF file, 4 pages, 5 figures, 1 color figure
arxiv created 1999/04/19 · arxiv updated 2009/11/30
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.