Abstract
We have successfully fabricated the colossal magnetoresistive (CMR) p-n junctions of perovskite oxide La0.9Sr0.1MnO3/SrNb0.01Ti0.99O3 (LSMO/SNTO) with laser molecular beam epitaxy. TheI-V characteristics of the LSMO/SNTO p-n junctions as a function of applied magnetic field (0–5 T) were studied between 100 and 300 K. We found that the p-n junction exhibited the CMR behavior. The CMR ratio ΔR/R 0 (ΔR =R H -R 0) is positive in magnetic fields below 0.13 T and at high temperature, while it displays a negative CMR near 100 K and in magnetic fields over 0.13 T. The CMR ratio values are 8% at 0.1 T and 13% at 5 T and 300 K, 40% at 0.1 T and 150 K, 10% at 0.13 T and -60% at 5 T and 100 K. The CMR behavior of the p-n junction is different from those of the LaMnO3 compound family.
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Lü, H., Dai, S., Chen, Z. et al. Colossal magnetoresistive p-n junctions of perovskite oxide La0.9Sr0.1MnO3/SrNb0.01Ti0.99O3O3 . Chin.Sci.Bull. 48, 1328–1330 (2003). https://doi.org/10.1007/BF03184172
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DOI: https://doi.org/10.1007/BF03184172