Suppression of photovoltaic effect by magnetic field in Pr 0.65(Ca0.75Sr0.25)0.35MnO 3/Nb:SrTiO3 heterostructure

C. Luo, K. X. Jin*, C. L. Chen, Tao Wu

*Corresponding author for this work

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The heterostructure composed of Pr0.65(Ca0.75Sr 0.25)0.35MnO3 and 0.7 wt. % Nb-doped SrTiO 3 was fabricated. The heterostructure exhibits an asymmetric current-voltage relation similar to that of p-n junctions and an obvious photovoltaic effect with its maximum value of about 25.1 mV at T = 140 K. It is interesting that the magnetic field has a strong suppression effect on photovoltaic effect, and the maximum relative change of photovoltage under the magnetic field of 1 T is about 63% with the illumination of 15 mW/mm2 light (532 nm) at T ∼ 140 K. The physical mechanism is explained by the electronic phase separation mechanism.

Original languageEnglish (US)
Article number212401
JournalApplied Physics Letters
Issue number21
StatePublished - Nov 18 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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