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Current-induced effect on resistivity and magnetoresistance of La0.67Ba0.33MnO3 manganite |
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| Authors: | Rajesh Kumar Ajai K Gupta DP Singh Vijay Kumar GL Bhalla Neeraj Khare |
| Institution: | 1. National Physical Laboratory, Dr. K.S. Krishnan Road, New Delhi 110012, India;2. Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India;3. School of Physics and Material Science, Thaper University, Patiala 147004, India;4. Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India |
| Abstract: | The influence of dc biasing current on temperature dependence of resistivity and low-field magnetoresistance (MR) of La0.67Ba0.33MnO3 bulk sample is reported. A prominent finding is the change in resistivity around the insulator-to-metal transition temperature (TIM) and the change in MR around the ferromagnetic transition temperature (TC). The decrease in MR around TC at higher biasing current indicates a strong interaction between carrier spin and spin of Mn ions resulting in a higher alignment of Mn ion spins. Change in resistivity around TIM is interpreted in the framework of percolative conduction model based on the mixed phase of itinerant electrons and localized magnetic polarons. |
| Keywords: | Magnetic field effect Metal&ndash insulator transitions Percolation phenomena Magnetoresistance La0 67Ba0 33MnO3 |
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