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Influence of magnetic correlations on low‐field magnetoresistance in La 2/3 Sr 1/3 MnO 3 /SrTiO 3 composites
Author(s) -
Tang Yankun,
Ge Xuefeng,
Si Xiaofei,
Zhao Wenjuan,
Wang Yu,
Dong Shuai,
Zhai Ya,
Sui Yu,
Su WenHui,
Almasan C. C.
Publication year - 2013
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201228538
Subject(s) - magnetoresistance , materials science , condensed matter physics , magnetic field , coupling (piping) , magnetism , field (mathematics) , composite number , colossal magnetoresistance , composite material , physics , mathematics , quantum mechanics , pure mathematics
We report on the structure, magnetism, and transport properties of composites La 2/3 Sr 1/3 MnO 3 /SrTiO 3 synthesized at 700 °C for 10 min. 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 La 2/3 Sr 1/3 MnO 3 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.