Half-metal-polymer magnetoresistive composite

Author

Mishra, S.R. ; Ghosh, Koushik ; Losby, J. ; Kehl, T. ; Viano, A.

Author_Institution

Dept. of Phys., Memphis Univ., TN, USA

fYear

2005

fDate

4-8 April 2005

Firstpage

1453

Lastpage

1454

Abstract

The conductivity and magneto transport properties of compression molded half-metallic CrO₂/polyimide composites over a range of different metallic concentrations have been studied. The conductivity measurements on these composites show negative slope of resistance versus temperature. The magnetoresistance measurement indicates obvious enhancement at low temperatures. The maximum in magnetoresistance is found to be temperature and metal volume fraction dependent. Significant differences in high and low temperature magnetoresistive behavior in the composite have been observed. Thus, it is found that the polymer barrier can contribute to enhancing magnetoresistive properties of the composite.

Keywords

chromium compounds; composite materials; compression moulding; electrical conductivity; enhanced magnetoresistance; interface magnetism; polymers; CrO₂; compression moulding; conductivity; enhanced magnetoresistance; half-metal-polymer magnetoresistive composite; magnetotransport; metal volume fraction; polyimide; Ceramics; Compression molding; Conductivity; Magnetic materials; Magnetic properties; Magnetoresistance; Physics; Polymers; Temperature dependence; Tunneling;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1464156

Filename

1464156