Influence of Different Substrates on Phase Separation in LPCMO Thin Films
- ORNL
Large scale phase separation between ferromagnetic metallic and charge-ordered insulating states in La{sub 1-x-y}Pr{sub y}Ca{sub x}MnO{sub 3} (LPCMO) crystals and thin films is very sensitive to structural and magnetic changes and is responsible for the enhanced magnetoresistance in LPCMO compared to its parent compounds. By epitaxially growing LPCMO thin films on different substrates, the strain on the LPCMO thin films can be changed, thereby controlling the energy balance between the two phases. LPCMO films of several different thicknesses have been grown on NdGaO{sub 3} (NGO), SrTiO{sub 3} (STO), SrLaGaO{sub 4} (SLGO), and LaAlO{sub 3} (LAO) substrates. The compressive strain from the LAO and SLGO substrates suppresses the long-range charge ordering in these samples and enhances magnetoresistance and magnetic hystereses. Conversely, the tensile strain from the STO and NGO substrates enhances the long-range charge ordering and reduces the magnetoresistance and magnetic hystereses.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1003142
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 99; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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