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Magnetotransport properties of epitaxial Pr0.5Ca0.5MnO3 films grown by a solution technique |
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| Authors: | M Staruch F Ronning QX Jia H Wang |
| Institution: | a Department of Physics, University of Connecticut, Storrs, CT 06269, USA b Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA c Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843, USA d The Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA |
| Abstract: | Epitaxial Pr0.5Ca0.5MnO3 films have been synthesized on (0 0 1) SrTiO3 substrate using a chemical solution deposition technique and two-step post-annealing process. The zero field resistivity of the films shows semiconducting behavior and a characteristic of charge ordering is observed at 230 K. The resistivity of the 10 nm film did not show any effect with the magnetic field. However, melting of charge ordering was observed for the 120 nm film at an applied magnetic field of 4 T. Large decrease in the resistivity of the 120 nm film (<100 K) resulted in magnetoresistance of nearly −100% at 75 K. |
| Keywords: | Charge ordering Melting Antiferromagnetic Pr0 5Ca0 5MnO3 Manganite Magnetoresistance |
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