Preparation and magnetic properties of submicron CrO₂ thin film on poly-crystal TiO₂ film

Abstract

The submicron chromium dioxide(CrO₂) thin film was fabricated on a poly-crystal titania(TiO₂) film using Si wafers as substrates by atmospheric pressure chemical vapor deposition(CVD) method. X-Ray diffraction patterns show that the CrO₂ films were pure rutile structure. Scanning electron microscopy(SEM) images indicate that the CrO₂ films consisted of submicron grains with a grain size of 250–750 nm. The magnetic researches reveal that the magnetic easy axis is parallel to the films, and at room temperature, the CrO₂ films show linear magnetoresistance.

Keywords

CrO₂ film / TiO₂ film / Chemical vapor deposition(CVD) / Magnetic property / Half-metal ferromagnet

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