Epitaxial La0.9Ca0.1MnO3 films grown on vicinal cut substrates for the investigation of resistivity and thermoelectric anisotropy

✍ Scribed by L. Yu; Y. Wang; P.X. Zhang; H.-U. Habermeier

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 317 KB
• Volume: 322
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2011.03.010

✦ Synopsis

La 0.9 Ca 0.1 MnO 3 thin films have been grown on 51 vicinal cut SrTiO 3 (1 0 0) substrates by pulse laser deposition. The single phase and the epitaxial growth aligned to the c-axis of vicinal cut substrates have been studied by X-ray diffraction analysis. The resistivity versus temperature measurements along and perpendicular to the substrate tilted direction show that the resistivity anisotropy r c /r ab is 22.44 at room temperature, originating from the intrinsic Jahn-Teller distortion, strain and defects. The Seebeck coefficient anisotropy DS of 0.317 mV K À 1 attained by laser-induced theroelectric voltages experiment has coincidence with the resistivity anisotropy, which is interpreted by the Mott band theory for Seebeck coefficient approximation.