Title :
Self assembled nanoparticulate Co:Pt for data storage applications
Author :
Warne, Barnaby ; Kasyutich, Oksana I. ; Mayes, Eric L. ; Wiggins, Jason A L ; Wong, Kim K W
Author_Institution :
NanoMagn. Ltd., Bath, UK
fDate :
9/1/2000 12:00:00 AM
Abstract :
Nanoscale CoPt grains were prepared within protein shells from aqueous reactants. A series of particles with varying Co:Pt ratios was used to explore the transition from superparamagnetic to ferromagnetic behavior at room temperature. TEM and electron diffraction confirmed ordered fct CoPt phases with an average grain size of 4.1 nm. Magnetic characterization was performed at room temperature using VSM. The use of this system to prepare high-density recording media is discussed
Keywords :
cobalt alloys; electron diffraction; ferromagnetic materials; grain size; magnetic particles; magnetic recording; magnetic transitions; nanostructured materials; platinum alloys; self-assembly; superparamagnetism; transmission electron microscopy; 20 C; 4.1 nm; CoPt; TEM; VSM; aqueous reactants; average grain size; data storage applications; electron diffraction; ferromagnetic behavior; high-density recording media; nanoscale CoPt grains; ordered fct CoPt phases; protein shells; room temperature; self assembled nanoparticulate Co:Pt; superparamagnetic behavior; Grain size; Iron; Magnetic films; Magnetic recording; Memory; Nanobioscience; Nanoparticles; Proteins; Self-assembly; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
