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Electrical Conductivity and Low-Field Magnetoresistance in La2/3(Ca0.60Ba0.40)1/3Mn1-xVxO3 Prepared by Sol-Gol

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Abstract:

La2/3(Ca0.6Ba0.4)1/3Mn1-xVxO3 (x=0, 0.03, 0.05, 0.07, 0.10, 0.15, 0.20) nanoparticles were synthesized using sol-gel technology. The experimental results reveal that, (1) the substitution of V for Mn in La2/3(Ca0.6Ba0.4)1/3Mn1-xVxO3 lowers the Curie temperature TC and the metal–insulator transition temperature TMI; (2) there exists the evident difference between the TC and the TMI for different V substitution ratio; (3) the low-temperature tunneling magnetoresistance and maximum magnetoresistance near Tc increase with the enhancement of V-doping content. Based on the tunneling magnetoresistance model and the percolation model near Curie temperature, the experimental results are explained well.

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Periodical:

Solid State Phenomena (Volumes 121-123)

Pages:

901-904

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.121-123.901

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Online since:

March 2007

Authors:

Hong Zhang, Shui Yuan Chen, Su Zhen Tang, Wen Pao Ke, Heng Lai, Zhi Gao Huang

Keywords:

Magnetoresistivity MR, Perovskite Manganite, Sol-Gel (SG)

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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