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期刊论文
Low-Temperature Magnetoresistance Effect in the Hydrothermally Synthesized La0.98Ca0.02MnO3-δ/Y-Mn2O3 Granular System
Journal of Shanghai Jiaotong University (Science), Vol. E-10, No.1, 2005, 91～94，-0001，（）：
The low-temperature magnetoresistance (LTMR) in hydrothermally synthesized La0.98Ca0.02MnO3-δ/y-Mn2O3 granular system was investigated. As-prepared powders are amorphous except for a small amount of crystalline phase LaCO3OH. After sintered at 1073K or above, La0.98Ca0.02MnO3-δ perovskite and secondary phase y-Mn2O3 coexist. A large LTMR of ～65% at 127 K and ～50% at 0 K in the sample with mean grain size of 23nm was observed. The observation of a large magnetoreslstance over a wide temperature interval could be of importance for useful applications.
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