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• W2085236369 startingPage "137~141" @default.
• W2085236369 abstract "The <TEX>$(1-x)La_{0.7}Sr_{0.3}MnO_3(LSMO)/xZnFe_2O_4$</TEX>(ZFO) (x = 0, 0.01, 0.03, 0.06 and 0.09) composites were prepared by a conventional solid-state reaction method. We investigated the structural properties, magnetic properties and electrical transport properties of (1-x)LSMO/xZFO composites using X-ray diffraction (XRD), scanning electron microscopy (SEM), field-cooled dc magnetization and magnetoresistance (MR) measurements. The XRD and SEM results indicate that LSMO and ZFO coexist in the composites and the ZFO mostly segregates at the grain boundaries of LSMO, which agreed well with the results of the magnetic measurements. The resistivity of the samples increased by the increase of the ZFO doping level. A clear metal-to-insulator (M-I) transition was observed at 360K in pure LSMO. The introduction of ZFO further downshifted the transition temperature (350K-160K) while the transition disappeared in the sample (x = 0.09) and it presented insulating/semiconducting behavior in the measured temperature range (100K to 400K). The MR was measured in the presence of the 10kOe field. Compared with pure LSMO, the enhancement of low-field magnetoresistance (LFMR) was observed in the composites. It was clearly observed that the magnetoresistance effect of x = 0.03 was enhanced at room temperature range. These phenomena can be explained using the double-exchange (DE) mechanism, the grain boundary effect and the intrinsic transport properties together." @default.
• W2085236369 created "2016-06-24" @default.
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• W2085236369 date "2010-03-01" @default.
• W2085236369 modified "2023-10-03" @default.
• W2085236369 title "Electrical Transport Properties and Magnetoresistance of (1-x)La0.7Sr0.3MnO3/xZnFe2O4Composites" @default.
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• W2085236369 doi "https://doi.org/10.3740/mrsk.2010.20.3.137" @default.
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