Effects of substrate-induced-strain on the electrical properties and laser induced voltages of tilted La_(0.67)Ca_(0.33)MnO_3 thin films

摘要

La_(0.67)Ca_(0.33)MnO3 thin films have been prepared on vicinal cut LaAlO_3, (LaAlO_3)_(0.3)-(SrAlTaO_6)_(0.7), and SrTiO3 (001) substrates by pulsed laser deposition. The influence of the substrate on the electrical transport properties and laser induced voltage (LIV) effect of the films was investigated. The high insulator to metal transition temperature Tp (263.6 K) and large peak voltage of LIV signal (2.328 V) were observed in the film grown on LaAlO_3 substrate. The compressive strain and large Seebeck coefficient anisotropy ΔS (3.62 μV/K) induced by LaAlO_3 are thought to be responsible for this result.