Title :
Hysteresis behavior of CoPt nanoparticles
Author :
Huang, Yunhe ; Zhang, Y. ; Hadjipanayis, G.C. ; Simopoulos, A. ; Weller, D.
Author_Institution :
Dept. of Phys., Delaware Univ., Newark, DE, USA
fDate :
9/1/2002 12:00:00 AM
Abstract :
CoPt nanoparticles embedded in nonmagnetic matrices M (M = C, BN) have been obtained by annealing multilayer precursors prepared by sputtering from Co50Pt50 and M targets in a tandem deposition mode onto Si substrate. The structure and microstructure development of the CoPt/C films has been studied at different annealing stages. Magnetic properties of CoPt with different particle size are investigated with respect to bilayer thickness, annealing conditions, and temperature. The possibility for high density recording media is discussed.
Keywords :
X-ray diffraction; annealing; cobalt alloys; coercive force; ferromagnetic materials; magnetic hysteresis; magnetic multilayers; magnetic particles; magnetic recording; nanostructured materials; particle size; platinum alloys; remanence; transmission electron microscopy; CoPt; Kelly-Henkel plots; Mossbauer spectra; TEM; XRD; annealing; bilayer thickness; coercivity; high density recording media; hysteresis behavior; magnetic films; magnetic nanoparticles; magnetic recording; microstructure development; multilayer precursors; nonmagnetic matrix embedded nanoparticles; particle size; remanence curves; tandem deposition mode; temperature dependence; Annealing; Disk recording; Magnetic films; Magnetic hysteresis; Magnetic multilayers; Magnetic properties; Microstructure; Nanoparticles; Sputtering; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.803209
