Tunneling magnetotransport in nano-granular-in-gap structure

Author

Jalil, M.B.A.

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore

fYear

2002

Abstract

Summary form only given. Nano-granular-in-gap (GIG) films have been proposed for use as magnetic sensors due to their large tunneling magnetoresistance (TMR) ratio. A Monte Carlo (MC) simulation is performed of magnetotransport across a 50/spl times/50 nm GIG film consisting of Co islands embedded in an insulating matrix, between contact electrodes. The islands magnetization is given by the Langevin function, while that of the contacts is obtained by micromagnetic simulation. We apply the orthodox theory of single charge tunneling to model the interplay between superparamagnetic and Coulomb charging effects.

Keywords

Monte Carlo methods; cobalt; digital simulation; discontinuous metallic thin films; ferromagnetic materials; magnetic thin films; magnetisation; micromagnetics; nanocomposites; nanoparticles; superparamagnetism; tunnelling magnetoresistance; 50 nm; Co embedded islands; Coulomb charging effects; Langevin function; Monte Carlo simulation; TMR ratio; contact electrodes; insulating matrix; magnetization; micromagnetic simulation; model; nano-granular-in-gap films; single charge tunneling; superparamagnetic effects; tunneling magnetotransport; Magnetic films; Magnetic materials; Magnetic separation; Magnetosphere; Material storage; Nanostructures; Permeability; Powders; Soft magnetic materials; Tunneling magnetoresistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International

Conference_Location

Amsterdam, The Netherlands

Print_ISBN

0-7803-7365-0

Type

conf

DOI

10.1109/INTMAG.2002.1001272

Filename

1001272