Change of the electrical properties of granular CoFeB–SiOn nanocomposites after heat treatment

O. V. StogneiCorresponding Author Contact Information, E-mail The Corresponding Author, V. A. Slyusarev, Yu. E. Kalinin, A. V. Sitnikov and M. N. Kopitin

Department of Solid State Physics, Voronezh State Technical University, Moscowskij Prospekt 14, Voronezh 394026, Russia

Available online 14 June 2003.


The influence of thermal annealing on the giant magnetoresistance and electrical resistivity of (Co41Fe39B20)x(SiOn)100-x granular composites has been investigated over a wide concentration range (36less-than or equal toxless-than or equal to60 in at.%). It has been observed that the heat treatment of the composites, which are below the percolation threshold, leads to an increase of the giant magnetoresistance (almost up to three times) and shifts the magnetoresistance maximum to a range with more dielectric concentration.

Author Keywords: Granular nanocomposites; Giant magnetoresistance; Thermal annealing; Tunneling conductivity

Corresponding Author Contact InformationCorresponding author.