PRODUCTION AND PROPERTIES OF THICK MAGNETORESISTIVE FILMS FROM FINE Ni_3B POWDERS

摘要

Pastes and films are produced from Ni_3B powders of different particle sizes using thick-film technology: screen printing of pastes on a dielectric substrate and subsequent 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 B_2O_3) formed during heat treatment of the films is determined. The magnetoresistance 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.