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

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3009

Lastpage

3011

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908658

Filename

908658