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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 25, Number 2
BKCSDE 25(2)
February 20, 2004 

La2/3Ca1/3MnO3 Nanoparticles with Novel Magnetoresistance Property
Jianwu Zhang,1 Eue-Soon Jang, Il-Won Chung, Jin-Ho Choy*
La2/3Ca1/3MnO3 nanoparticles, Citrate pyrolysis process, Magnetoresistance effect
Fine La2/3Ca1/3MnO3 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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