Pressure-induced enhancement of the blocking temperature in FePt nanoparticles

The magnetic properties of FePt magnetic nanoparticles with the particle size of 2.0 ± 0.6 nm were investigated through AC magnetic susceptibility measurements under hydrostatic pressure. At a frequency of 1 Hz, a blocking temperature increases linearly from 42.9 to 44.6 K by increasing pressure (P)...

Full description

Saved in:
Bibliographic Details
Published inJournal of physics. Conference series Vol. 200; no. 7
Main Authors Komorida, Y, Mito, M, Deguchi, H, Takagi, S, Iwamoto, T, Kitamoto, Y
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2010
Subjects
Anisotropy
Hydrostatic pressure
Intermetallic compounds
Iron compounds
Magnetic permeability
Magnetic properties
Nanoparticles
Particle size
Physics
Platinum compounds
Temperature
Online AccessGet full text

Cover

More Information
Summary:The magnetic properties of FePt magnetic nanoparticles with the particle size of 2.0 ± 0.6 nm were investigated through AC magnetic susceptibility measurements under hydrostatic pressure. At a frequency of 1 Hz, a blocking temperature increases linearly from 42.9 to 44.6 K by increasing pressure (P) up to 1.43 GPa. The X-ray diffraction experiments under hydrostatic pressure reveal that both the particle size and lattice parameter hardly change in the considered pressure region. These experimental results suggest that the effective magnetocrystalline anisotropy increases under hydrostatic pressure.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/200/7/072054