Growth and properties of c-axis textured La0.7Sr0.3MnO3−δ films on SiO2/Si substrates with a Bi4Ti3O12 template layer

Authors:

31 March 1997

journal article
Published by AIP Publishing in Applied Physics Letters

Vol. 70 (13) , 1763-1765
DOI:10.1063/1.118649

Abstract

C -axis textured La0.7Sr0.3MnO3−δ (LSMO) films were fabricated on SiO2/Si(001) substrates using a Bi4Ti3O12 (BTO) template layer. Electrical and magnetic properties of LSMO were investigated. The LSMO/BTO layer of this structure has no in-plane alignment. Even though a ferromagnetic transition temperature, TC, is as high as that of the epitaxial LSMO film (360 K), a resistivity peak temperature, TP, is about 140 K lower than TC. The resistivity behavior as a function of temperature for LSMO/BTO/SiO2/Si films is found to be dominated by grain boundary effects. Low field sensitive magnetoresistance which suggests spin tunneling through the grain boundaries is also observed at room temperature.

Keywords

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