Growth and properties of c-axis textured La0.7Sr0.3MnO3-δ films on SiO2/Si substrates with a Bi4Ti3O12 template layer
Publication Type
Journal Article
Authors
Gu, J.Y, C Kwon, M.C Robson, Z Trajanovic, K Ghosh, R.P Sharma, R Shreekala, M Rajeswari, T Venkatesan, Ramamoorthy Ramesh, T.W Noh
DOI
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. © 1997 American Institute of Physics.
Journal
Applied Physics Letters
Volume
70
Year of Publication
1997
ISSN
00036951
Notes
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