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Title: Suppression of photovoltaic effect by magnetic field in Pr{sub 0.65}(Ca{sub 0.75}Sr{sub 0.25}){sub 0.35}MnO{sub 3}/Nb:SrTiO{sub 3} heterostructure

The heterostructure composed of Pr{sub 0.65}(Ca{sub 0.75}Sr{sub 0.25}){sub 0.35}MnO{sub 3} and 0.7 wt. % Nb-doped SrTiO{sub 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/mm{sup 2} light (532 nm) at T ∼ 140 K. The physical mechanism is explained by the electronic phase separation mechanism.
Authors:
; ;  [1] ;  [2]
  1. Shaanxi Key Laboratory of Condensed Matter Structures and Properties and Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education, School of Science, Northwestern Polytechnical University, Xi'an 710072 (China)
  2. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371 (Singapore)
Publication Date:
OSTI Identifier:
22254030
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DOPED MATERIALS; MAGNETIC FIELDS; PHOTOVOLTAIC EFFECT; P-N JUNCTIONS; STRONTIUM TITANATES; VISIBLE RADIATION