Magnetic behaviors and enhanced magnetoresistance in granular (La 0.7Pb0.3MnO3)1-x(Fe 2O3)x composites

S. L. Young; Lance Horng; Y. W. Ho; K. M. Wu; Yu-Tai Shih; H. Z. Chen; M. C. Kao; J. B. Shi; C. C. Lin

doi:10.1002/pssc.200777238

Magnetic behaviors and enhanced magnetoresistance in granular (La _0.7Pb_0.3MnO₃)_1-x(Fe ₂O₃)_x composites

S. L. Young, Lance Horng, Y. W. Ho, K. M. Wu, Yu-Tai Shih, H. Z. Chen, M. C. Kao, J. B. Shi, C. C. Lin

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

Recently, researches indicate that grain boundaries and interfaces can be the major factors of magnetoresistance effects, which has attracted renewed interests on the colossal magnetoresistance materials. In this article, the magnetic behaviours and magnetotransport properties of (La_0.7Pb _0.3MnO₃)_1-x(Fe₂O₃) _x composites have been investigated. Ferromagnetism is gradually suppressed as the weight percentage of Fe₂O₃ is increased. Saturation magnetization (M_S) decreases from 78.7 emu/g for x = 0.0 to 60.6 emu/g for x = 0.2, while ferromagnetic transition temperature (T _C) remains around 346K for all composites. The resistivity increases significantly as the x value increases in these composites. It is suggested that the introduction of Fe₂O₃ into the composites acts as a separation layer between La_0.7Pb_0.3MnO₃ grains. The enhancement of magnetoresistance has been verified with the addition of Fe₂O₃ into the composites.

Original language	English
Pages (from-to)	4556-4559
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	4
Issue number	12
DOIs	https://doi.org/10.1002/pssc.200777238
Publication status	Published - 2007 Dec 1
Event	International Symposium on Advanced Magnetic Materials and Appilications, (ISAMMA 2007) - Jeju, Korea, Republic of Duration: 2007 May 28 → 2007 Jun 1

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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@article{7b6f6bacc82543d9b107480d15cdafce,

title = "Magnetic behaviors and enhanced magnetoresistance in granular (La 0.7Pb0.3MnO3)1-x(Fe 2O3)x composites",

abstract = "Recently, researches indicate that grain boundaries and interfaces can be the major factors of magnetoresistance effects, which has attracted renewed interests on the colossal magnetoresistance materials. In this article, the magnetic behaviours and magnetotransport properties of (La0.7Pb 0.3MnO3)1-x(Fe2O3) x composites have been investigated. Ferromagnetism is gradually suppressed as the weight percentage of Fe2O3 is increased. Saturation magnetization (MS) decreases from 78.7 emu/g for x = 0.0 to 60.6 emu/g for x = 0.2, while ferromagnetic transition temperature (T C) remains around 346K for all composites. The resistivity increases significantly as the x value increases in these composites. It is suggested that the introduction of Fe2O3 into the composites acts as a separation layer between La0.7Pb0.3MnO3 grains. The enhancement of magnetoresistance has been verified with the addition of Fe2O3 into the composites.",

author = "Young, {S. L.} and Lance Horng and Ho, {Y. W.} and Wu, {K. M.} and Yu-Tai Shih and Chen, {H. Z.} and Kao, {M. C.} and Shi, {J. B.} and Lin, {C. C.}",

year = "2007",

month = dec,

day = "1",

doi = "10.1002/pssc.200777238",

language = "English",

volume = "4",

pages = "4556--4559",

journal = "Physica Status Solidi C: Conferences",

issn = "1862-6351",

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number = "12",

note = "International Symposium on Advanced Magnetic Materials and Appilications, (ISAMMA 2007) ; Conference date: 28-05-2007 Through 01-06-2007",

}

Magnetic behaviors and enhanced magnetoresistance in granular (La _0.7Pb_0.3MnO₃)_1-x(Fe ₂O₃)_x composites. / Young, S. L.; Horng, Lance; Ho, Y. W.; Wu, K. M.; Shih, Yu-Tai; Chen, H. Z.; Kao, M. C.; Shi, J. B.; Lin, C. C.

In: Physica Status Solidi (C) Current Topics in Solid State Physics, Vol. 4, No. 12, 01.12.2007, p. 4556-4559.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

T1 - Magnetic behaviors and enhanced magnetoresistance in granular (La 0.7Pb0.3MnO3)1-x(Fe 2O3)x composites

AU - Young, S. L.

AU - Horng, Lance

AU - Ho, Y. W.

AU - Wu, K. M.

AU - Shih, Yu-Tai

AU - Chen, H. Z.

AU - Kao, M. C.

AU - Shi, J. B.

AU - Lin, C. C.

PY - 2007/12/1

Y1 - 2007/12/1

N2 - Recently, researches indicate that grain boundaries and interfaces can be the major factors of magnetoresistance effects, which has attracted renewed interests on the colossal magnetoresistance materials. In this article, the magnetic behaviours and magnetotransport properties of (La0.7Pb 0.3MnO3)1-x(Fe2O3) x composites have been investigated. Ferromagnetism is gradually suppressed as the weight percentage of Fe2O3 is increased. Saturation magnetization (MS) decreases from 78.7 emu/g for x = 0.0 to 60.6 emu/g for x = 0.2, while ferromagnetic transition temperature (T C) remains around 346K for all composites. The resistivity increases significantly as the x value increases in these composites. It is suggested that the introduction of Fe2O3 into the composites acts as a separation layer between La0.7Pb0.3MnO3 grains. The enhancement of magnetoresistance has been verified with the addition of Fe2O3 into the composites.

AB - Recently, researches indicate that grain boundaries and interfaces can be the major factors of magnetoresistance effects, which has attracted renewed interests on the colossal magnetoresistance materials. In this article, the magnetic behaviours and magnetotransport properties of (La0.7Pb 0.3MnO3)1-x(Fe2O3) x composites have been investigated. Ferromagnetism is gradually suppressed as the weight percentage of Fe2O3 is increased. Saturation magnetization (MS) decreases from 78.7 emu/g for x = 0.0 to 60.6 emu/g for x = 0.2, while ferromagnetic transition temperature (T C) remains around 346K for all composites. The resistivity increases significantly as the x value increases in these composites. It is suggested that the introduction of Fe2O3 into the composites acts as a separation layer between La0.7Pb0.3MnO3 grains. The enhancement of magnetoresistance has been verified with the addition of Fe2O3 into the composites.

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