Magnetic properties of Fe-Pd alloy nanoparticles

Yoshikazu Ito; Akira Miyazaki; Suresh Valiyaveettil; Toshiaki Enoki

doi:10.1021/jp910187r

Magnetic properties of Fe-Pd alloy nanoparticles

Yoshikazu Ito, Akira Miyazaki, Suresh Valiyaveettil, Toshiaki Enoki

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Pd nanoparticles (2 nm in diameter) containing magnetic Fe atoms are prepared and their magnetic properties are investigated. The magnetic moment of the particles is enhanced in the low Fe concentration region and takes a maximum value of 7.6 μ_B per Fe atom at the concentration in which each Pd nanoparticle contains one Fe atom on average. This giant magnetic moment is explained in terms of the spin polarization on Pd atoms caused by the exchange enhancement mechanism. The magnetization curve shows that these Fe-Pd alloy nanoparticles exhibit superparamagnetic behavior, although no blocking behavior in the temperature dependence of the magnetic susceptibility was observed due to the small magnetic anisotropy of Fe.

Original language	English
Pages (from-to)	11699-11702
Number of pages	4
Journal	Journal of Physical Chemistry C
Volume	114
Issue number	27
DOIs	https://doi.org/10.1021/jp910187r
Publication status	Published - 2010 Jul 15

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/jp910187r

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AU - Ito, Yoshikazu

AU - Miyazaki, Akira

AU - Valiyaveettil, Suresh

AU - Enoki, Toshiaki

PY - 2010/7/15

Y1 - 2010/7/15

N2 - Pd nanoparticles (2 nm in diameter) containing magnetic Fe atoms are prepared and their magnetic properties are investigated. The magnetic moment of the particles is enhanced in the low Fe concentration region and takes a maximum value of 7.6 μB per Fe atom at the concentration in which each Pd nanoparticle contains one Fe atom on average. This giant magnetic moment is explained in terms of the spin polarization on Pd atoms caused by the exchange enhancement mechanism. The magnetization curve shows that these Fe-Pd alloy nanoparticles exhibit superparamagnetic behavior, although no blocking behavior in the temperature dependence of the magnetic susceptibility was observed due to the small magnetic anisotropy of Fe.

AB - Pd nanoparticles (2 nm in diameter) containing magnetic Fe atoms are prepared and their magnetic properties are investigated. The magnetic moment of the particles is enhanced in the low Fe concentration region and takes a maximum value of 7.6 μB per Fe atom at the concentration in which each Pd nanoparticle contains one Fe atom on average. This giant magnetic moment is explained in terms of the spin polarization on Pd atoms caused by the exchange enhancement mechanism. The magnetization curve shows that these Fe-Pd alloy nanoparticles exhibit superparamagnetic behavior, although no blocking behavior in the temperature dependence of the magnetic susceptibility was observed due to the small magnetic anisotropy of Fe.

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Magnetic properties of Fe-Pd alloy nanoparticles

Abstract

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