Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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La2/3Ca1/3MnO3 Nanoparticles with Novel Magnetoresistance Property

  • Zhang, Jianwu (National Nanohybrid Materials Laboratory (NNML), School of Chemistry and Molecular Engineering, Seoul National University) ;
  • Jang, Eue-Soon (National Nanohybrid Materials Laboratory (NNML), School of Chemistry and Molecular Engineering, Seoul National University) ;
  • Chung, Il-Won (National Nanohybrid Materials Laboratory (NNML), School of Chemistry and Molecular Engineering, Seoul National University) ;
  • Choy, Jin-Ho (National Nanohybrid Materials Laboratory (NNML), School of Chemistry and Molecular Engineering, Seoul National University)
  • Published : 2004.02.20
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Abstract

Fine $La_{2/3}Ca_{1/3}MnO_3$ nanocrystalline powders have been successfully prepared by modified citrate pyrolysis process. The obtained LCMO nanoscale grains have a mean particle size of about 30 nm under optimal treatment conditions. The particle size can be controlled by adjusting processing parameters, such as treatment temperature and calcination time. X-ray diffraction, SEM and magnetoresistance effect were employed to study the crystal structure, morphology and magnetic property of these nanosized powders. A novel MR effect (MR > 45% (0 K < T < 340 K)) at room temperature has been found.

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References

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