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High Curie temperature in B-site ordered Sr2CrWO6 epitaxial thin films |
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| Authors: | A Venimadhav MG Blamire |
| Institution: | a Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, UK b Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 3QZ, UK c Centre for Science at Extreme Conditions and School of Chemistry, University of Edinburgh, King's Building, Mayfield Road, Edinburgh EH9 3JZ, UK |
| Abstract: | Epitaxial and c-axis oriented double perovskite Sr2CrWO6 thin films were prepared on SrTiO3 (100) and LaAlO3 (100) substrates by pulsed-laser deposition. Structural, magnetic and transport properties were found to be sensitive to the gas conditions employed during the deposition. A small amount of oxygen along with Ar during the deposition was found to be essential for B-site ordering; such films displayed lattice parameters close to the bulk value and display ferromagnetic metallic behavior. The Curie temperature observed above 500 K in these films is higher than bulk Sr2CrWO6 samples. Films grown without oxygen were observed to have long c-parameter and no B-site ordering; they were non-magnetic and semiconducting. |
| Keywords: | 71 28 +d 75 25 +z 75 30 Cr 75 70 &minus i |
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