Journal
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
Volume 210, Issue 6, Pages 1195-1200Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201228538
Keywords
composites; magnetic correlations; magnetoresistance; manganites
Funding
- NSFC [10904013, 11074034]
- National Science Foundation of Jiangsu Province of China [BK2009260]
- NBRP [2010CB923404]
- SRF for ROCS, SEM
- National Science Foundation of USA [DMR-1006606]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1006606] Funding Source: National Science Foundation
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We report on the structure, magnetism, and transport properties of composites La2/3Sr1/3MnO3/SrTiO3 synthesized at 700 degrees C for 10min. The results show that high-field magnetoresistance is almost the same for all composites. However, an enhancement of the low-field magnetoresistance is observed due to the weakening of the magnetic correlations with decreasing the La2/3Sr1/3MnO3 component of the composite. This paper suggests that the weakening of magnetic coupling between the nanostructured grains or films is a viable route to achieve a large magnetoresistance at low applied magnetic fields.
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