Title :
Hysteresis behavior of CoPt nanoparticles
Author :
Huang, Y.H. ; Zhang, Ye ; Hadjipanayis, G.C. ; Weller, Dieter
Author_Institution :
Dept. of Phys., Delaware Univ., Newark, DE, USA
Abstract :
Summary form only given. The authors investigate the structural and intrinsic magnetic properties of CoPt (FePt) nanoparticles with respect to the particle size and interaction between the particles. All the as-made films are magnetically soft. The films consist of the fcc CoPt phase with grain size less than 2 nm. After annealing the coercivity of the samples increases due to both an increase in particle size and the L1/sub 0/ atomic ordering of the particles.
Keywords :
annealing; cobalt alloys; coercive force; crystal structure; ferromagnetic materials; grain size; magnetic hysteresis; magnetic particles; magnetic thin films; nanoparticles; particle size; platinum alloys; soft magnetic materials; 2 nm; C amorphous matrix; CoPt; CoPt nanoparticles; CoPt-C; FePt; FePt nanoparticles; FePt-C; L1/sub 0/ atomic ordering; annealing; coercivity; fcc phase; grain size; hysteresis behavior; intrinsic magnetic properties; particle interaction; particle size; randomly oriented single crystalline particles; soft magnetic films; Amorphous magnetic materials; Hysteresis; Magnetic anisotropy; Magnetic films; Magnetic properties; Nanocrystals; Nanoparticles; Perpendicular magnetic anisotropy; Physics; Saturation magnetization;
Conference_Titel :
Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
0-7803-7365-0
DOI :
10.1109/INTMAG.2002.1001266
