A systematic investigation of lanthanum-based manganite, La 0.67 Ca 0.33 MnO 3 , has been undertaken with a view to understand the influence of varying crystallite size, in the nanoscale, on various physical properties. The materials were prepared by the sol-gel route by sintering at four different
Electrical transport and magnetic properties of nanostructured La0.67Ca0.33MnO3
β Scribed by Y.G. Zhao; W. Cai; X.S. Wu; X.P. Zhang; K. Wang; S.N. Gao; L. Lu; J. Zhu
- Publisher
- Springer
- Year
- 2005
- Tongue
- English
- Weight
- 675 KB
- Volume
- 81
- Category
- Article
- ISSN
- 1432-0630
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The influence of Fe 3 O 4 contents on the electrical transport properties (resistivity and ac susceptibility) of a series of composite samples of La 0.67 Ca 0.33 MnO 3 /Fe 3 O 4 is studied. Results show that the Fe 3 O 4 phase not only shifts the intrinsic insulator -metal (I-M) transition temperatu
An enhanced magnetoresistance and a two-fold effect result from impurity dopant were observed in composites of La 0.67 Ca 0.33 MnO 3 /YSZ and La 0.67 Ca 0.33 MnO 3 /Fe 3 O 4 . Where YSZ represents yttria-stabilized zirconia and the doping level of both YSZ and Fe 3 O 4 is 1 mol%. Different electrica
Synthesis of Magnetoresistive Manganites La 0.67 Ca 0.33 MnO 3 and La 0.60 Y 0.07 Ca 0.33 MnO 3 . -Stepwise heating of the reaction mixture of the corresponding metal oxolates, obtained by the co-precipitation method, at 950 β’ C and 1200 β’ C in an oxygen atmosphere provides the title manganites wit
We report electron spin resonance (ESR) and magnetization measurements in La 0.67 Ca 0.33 MnO 3 thin films deposited on LaAlO 3 single-crystal substrates by DC sputtering technique. Angular and temperature dependence of resonance field (H Res ) and ESR line-width (DH PP ) were measured in the ferrom