Title :
Surface magnetism of Pd-Fe fine particles
Author :
Shinohara, Takenao ; Shigemune, Masayuki ; Sato, Tetsuya ; Taniyama, Tomoyasu
Author_Institution :
Keio Univ., Yokohama, Japan
fDate :
9/1/2002 12:00:00 AM
Abstract :
Magnetization and ac susceptibility measurements of Pd98.0Fe2.0 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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.801968
