Low field magnetoresistance in intrinsic granular system La1-xBaxMnO3

Y. S. Nam; H. L. Ju; C. W. Park

doi:10.1016/S0038-1098(01)00291-5

Low field magnetoresistance in intrinsic granular system La_1-xBa_xMnO₃

Y. S. Nam, H. L. Ju, C. W. Park

Department of Physics

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The La_1-xBa_xMnO₃ for 0.5≤x was found to be an intrinsic magnetic granular system composed of ferromagnetic/metallic phase and insulating phase. Owing to the magnetic granularity, the La_1-xBa_xMnO₃ system for 0.5≤x shows a three-dimensional percolation-type conduction behavior with a percolation threshold of x_p=∼0.85 (i.e. ferromagnetic volume fraction, θ_p(%), of ∼17%) and a large low field magnetoresistance (MR). The MR of 12-16% at 500 Oe and 77 K was found in the granular ferromagnetic region over a wide range of doping 0.5≤x≤0.75, and the MR was found to become small for x<0.5 and x>0.75.

Original language	English
Pages (from-to)	613-618
Number of pages	6
Journal	Solid State Communications
Volume	119
Issue number	10-11
DOIs	https://doi.org/10.1016/S0038-1098(01)00291-5
Publication status	Published - 2001 Aug 29

Bibliographical note

Funding Information:
We thank Drs E. O. Ji and N. H. Huhr for their helps in X-ray analysis. This work was supported by grant No. 2000-2-12100-002-3 from the Basic Research Program of the Korea Science and Engineering Foundation.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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title = "Low field magnetoresistance in intrinsic granular system La1-xBaxMnO3",

abstract = "The La1-xBaxMnO3 for 0.5≤x was found to be an intrinsic magnetic granular system composed of ferromagnetic/metallic phase and insulating phase. Owing to the magnetic granularity, the La1-xBaxMnO3 system for 0.5≤x shows a three-dimensional percolation-type conduction behavior with a percolation threshold of xp=∼0.85 (i.e. ferromagnetic volume fraction, θp(%), of ∼17%) and a large low field magnetoresistance (MR). The MR of 12-16% at 500 Oe and 77 K was found in the granular ferromagnetic region over a wide range of doping 0.5≤x≤0.75, and the MR was found to become small for x<0.5 and x>0.75.",

author = "Nam, {Y. S.} and Ju, {H. L.} and Park, {C. W.}",

note = "Funding Information: We thank Drs E. O. Ji and N. H. Huhr for their helps in X-ray analysis. This work was supported by grant No. 2000-2-12100-002-3 from the Basic Research Program of the Korea Science and Engineering Foundation.",

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T1 - Low field magnetoresistance in intrinsic granular system La1-xBaxMnO3

AU - Nam, Y. S.

AU - Ju, H. L.

AU - Park, C. W.

N1 - Funding Information: We thank Drs E. O. Ji and N. H. Huhr for their helps in X-ray analysis. This work was supported by grant No. 2000-2-12100-002-3 from the Basic Research Program of the Korea Science and Engineering Foundation.

PY - 2001/8/29

Y1 - 2001/8/29

N2 - The La1-xBaxMnO3 for 0.5≤x was found to be an intrinsic magnetic granular system composed of ferromagnetic/metallic phase and insulating phase. Owing to the magnetic granularity, the La1-xBaxMnO3 system for 0.5≤x shows a three-dimensional percolation-type conduction behavior with a percolation threshold of xp=∼0.85 (i.e. ferromagnetic volume fraction, θp(%), of ∼17%) and a large low field magnetoresistance (MR). The MR of 12-16% at 500 Oe and 77 K was found in the granular ferromagnetic region over a wide range of doping 0.5≤x≤0.75, and the MR was found to become small for x<0.5 and x>0.75.

AB - The La1-xBaxMnO3 for 0.5≤x was found to be an intrinsic magnetic granular system composed of ferromagnetic/metallic phase and insulating phase. Owing to the magnetic granularity, the La1-xBaxMnO3 system for 0.5≤x shows a three-dimensional percolation-type conduction behavior with a percolation threshold of xp=∼0.85 (i.e. ferromagnetic volume fraction, θp(%), of ∼17%) and a large low field magnetoresistance (MR). The MR of 12-16% at 500 Oe and 77 K was found in the granular ferromagnetic region over a wide range of doping 0.5≤x≤0.75, and the MR was found to become small for x<0.5 and x>0.75.

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