High density magnetic recording on protein-derived nanoparticles

被引：64

作者：

Hoinville, J ^{[1
]}

Bewick, A ^{[1
]}

Gleeson, D ^{[1
]}

Jones, R ^{[1
]}

Kasyutich, O ^{[1
]}

Mayes, E ^{[1
]}

Nartowski, A ^{[1
]}

Warne, B ^{[1
]}

Wiggins, J ^{[1
]}

Wong, K ^{[1
]}

机构：

[1] Nanomagnet Ltd, Bristol BS16 7FG, Avon, England

来源：

JOURNAL OF APPLIED PHYSICS | 2003年 / 93卷 / 10期

关键词：

D O I：

10.1063/1.1555896

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Self-organized Co/Pt nanoparticulate arrays offer a novel approach to fabricating magnetic recording media with the potential for supporting Terabit/in.(2) recording densities. Protein-derived Co/Pt nanoparticles are prepared within apoferritin from aqueous reactants, with synthesis conditions controlling grain size, structure, and composition. Smooth films on glass disk substrates are produced by either spin coating or dip coating from aqueous dispersions of the precursor material. Films are typically annealed at 590degreesC for 60 min with a 19 kPa (190 mBar) partial pressure of H-2 to form the L1(0) phase. By varying the annealing conditions we are able to produce coercivities in the range of 500-8000 Oe. Electrical testing of Co/Pt nanoparticulate media using a contact test recorder shows that these nanoparticle films are capable of sustaining recording densities of more than 12.6 Gbits/in.(2) (143.6 kfci, kilo flux changes per inch). In this article we will present results from finished films with regard to film structure, magnetic properties, and recording capabilities. (C) 2003 American Institute of Physics.

引用

页码：7187 / 7189

页数：3

共 10 条

[1]

*EUX TECHN, ADV REC MOD ARM

[2] Micromagnetic modeling of soft magnetic underlayers for perpendicular recording [J].