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.
| 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 | |
| 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 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
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Magnetic behaviors and enhanced magnetoresistance in granular (La 0.7Pb0.3MnO3)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
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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U2 - 10.1002/pssc.200777238
DO - 10.1002/pssc.200777238
M3 - Conference article
AN - SCOPUS:38349173092
VL - 4
SP - 4556
EP - 4559
JO - Physica Status Solidi (C) Current Topics in Solid State Physics
JF - Physica Status Solidi (C) Current Topics in Solid State Physics
SN - 1862-6351
IS - 12
ER -