Production and Properties of Magnetoresistive Thick Films from Fine Ni3B Powders

B.Rud,
 
E.Telnikov,
 
A.K.Marchuk,
 
A.Gonchar,
 
A.Rogozinskaya
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2013, #05/06
http://www.materials.kiev.ua/article/944

Abstract

Pastes and films are made from Ni3B powders of various particle sizes using thick-film technology: screen printing of the pastes on a dielectric substrate, followed by heat treatment in air without any protection. The phase composition and structure of the films are examined by X-ray diffraction and electron microscopy; the size of nanostructured elements (ferromagnetic Ni and dielectric layer of B2O3) formed during heat treatment of the films is determined. The magnetore-sistance of the films in a 0-2 T magnetic field is measured. The influence of the external magnetic field on the magnetoresistance of the films is determined by spin-dependent tunneling of charge carriers.


HEAT TREATMENT, MAGNETORESISTANCE, NANOPARTICLES, SCREEN PRINTING, STRUCTURE, THICK FILM