La0.6Sr0.4MnO3 /BiFeO3 Heterostructure Studied by Reflectance and Time-Resolved Spectroscopy
Wen-Yen Tzeng1*, Cheng Luo1, Changcheng Ju2,3, Ying-Hao Chu2, Chih-Wei Luo1
1Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan
2Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
3National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing, China
* presenting author:Wen-Yen Tzeng,
In this study, the La0.6Sr0.4MnO3/BiFeO3 (LSMO/BFO) heterostructure thin films were fabricated by pulsed laser deposition (PLD) on DyScO3 substrates. We investigated the temperature-dependent optical properties and carrier dynamics of LSMO/BFO heterostructures by IR reflectance from 100 cm-1 to 10000 cm-1 and the dual-color pump- probe spectroscopy, respectively. Due to the domain patterns of BFO, the anisotropic optical conductivity, carrier dynamics, and resistivity of LSMO/BFO heterostructures were clearly observed. Moreover, the results demonstrate that the properties of LSMO (or perovskite-type oxide) films can be significantly modified by not only the doping or substrates, but also the patterned heterostructure.

Keywords: LSMO, BFO, heterostructure thin films, Time-Resolved Spectroscopy, Reflectance Spectroscopy