Observation of two kinds of ESR spectra in FePt nanoparticles

The size effects on magnetic properties of FePt nanoparticles were investigated through ESR experiment in X-band at room temperature. For particle size (D) of ≥ 2.6 nm, the absorption spectra were the Gaussian type, whereas for D 2.0 nm, it was reproduced with the summation of the Gaussian and Loren...

Full description

Saved in:
Bibliographic Details
Published inJournal of physics. Conference series Vol. 200; no. 7; p. 072102
Main Authors Tsuruda, H, Komorida, Y, Mito, M, Deguchi, H, Takagi, S, Iwamoto, T, Kitamoto, Y
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2010
Subjects
Absorption spectra
Intermetallic compounds
Iron compounds
Magnetic properties
Nanoparticles
Physics
Platinum compounds
Room temperature
Size effects
Superhigh frequencies
Online AccessGet full text

Cover

More Information
Summary:The size effects on magnetic properties of FePt nanoparticles were investigated through ESR experiment in X-band at room temperature. For particle size (D) of ≥ 2.6 nm, the absorption spectra were the Gaussian type, whereas for D 2.0 nm, it was reproduced with the summation of the Gaussian and Lorentzian types. It has been well known that a face-centered-tetragonal (fct) structure becomes unstable for D of below 2-4 nm. Two kinds of magnetic components for FePt nanoparticles with D 2.0 nm, observed in the ESR spectrum at room temperature, are considered to be attributed to the coexistence of the particles with fct structure and those with face-centered cubic structures.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/200/7/072102