Title :
Tunneling magnetotransport in nano-granular-in-gap structure
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
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;
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
DOI :
10.1109/INTMAG.2002.1001272
