Surface magnetism of Pd-Fe fine particles

Author

Shinohara, Takenao ; Shigemune, Masayuki ; Sato, Tetsuya ; Taniyama, Tomoyasu

Author_Institution

Keio Univ., Yokohama, Japan

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2634

Lastpage

2636

Abstract

Magnetization and ac susceptibility measurements of Pd_98.0Fe_2.0 fine particles (average radii of 7.6-20.4 nm) gave the evidence of magnetic ordering of the surface layer in fine particle. The magnetic transition temperature of the surface layer in Pd-Fe fine particles was determined to be about 40 K based on the peaks in nonlinear susceptibility, and it slightly decreased with decreasing the particle size. Moreover, the size dependence of saturation magnetization indicates that the surface layer has no saturation magnetization at low temperature.

Keywords

RKKY interaction; ferromagnetic materials; iron alloys; magnetic hysteresis; magnetic particles; magnetic structure; magnetic susceptibility; magnetic transition temperature; palladium alloys; surface magnetism; AC susceptibility; Pd-Fe; Pd₉₈Fe₂; RKKY interaction; ferromagnetic ordering; fine particles; magnetic ordering; magnetic structure; magnetic transition temperature; nonlinear susceptibility; particle size dependence; saturation magnetization; surface magnetism; temperature dependence; Iron; Magnetic anisotropy; Magnetic materials; Magnetic properties; Magnetic susceptibility; Magnetic variables measurement; Perpendicular magnetic anisotropy; Saturation magnetization; Superconducting magnets; Superconducting transition temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.801968

Filename

1042295