Comparison of the magnetotransport properties between (La 0.7Pb0.3MnO3)1-xAgx and (La0.7Pb0.3MnO3)1-x(Fe 2O3)x composites

S. L. Young; C. C. Lin; J. B. Shi; H. Z. Chen; L. Horng

doi:10.1016/j.matlet.2005.11.091

Comparison of the magnetotransport properties between (La _0.7Pb_0.3MnO₃)_1-xAg_x and (La_0.7Pb_0.3MnO₃)_1-x(Fe ₂O₃)_x composites

S. L. Young, C. C. Lin, J. B. Shi, H. Z. Chen, L. Horng

Department of Physics

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

11 Citations (Scopus)

Abstract

Ceramic composites of (La_0.7Pb_0.3MnO ₃)_1-xAg_x and (La_0.7Pb _0.3MnO₃)_1-x(Fe₂O₃) _x are prepared by using chemical and solid-sate sintering route. The structural and magnetotransport properties are studied for these composites. Ferromagnetism is gradually suppressed with the increase of Ag or Fe ₂O₃ mole percentage for both systems. The resistivity decreases significantly for (La_0.7Pb_0.3MnO ₃)_1-xAg_x while resistivity increases dramatically for (La_0.7Pb_0.3MnO₃) _1-x(Fe₂O₃)_x. It is suggested that the introduction of Ag into the niche of grain boundaries forms artificial conducting network and improve the carriers to transport. Contrarily, the Fe₂O₃ in (La_0.7Pb_0.3MnO ₃)_1-x(Fe₂O₃)_x composite acts as a separation layer between two grains and forms the artificial tunneling junction. However, the enhancement of magnetoresistance has been observed for both systems.

Original language	English
Pages (from-to)	1682-1686
Number of pages	5
Journal	Materials Letters
Volume	60
Issue number	13-14
DOIs	https://doi.org/10.1016/j.matlet.2005.11.091
Publication status	Published - 2006 Jun 1

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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@article{9a937396c11e4f508ea09da80a58f256,

title = "Comparison of the magnetotransport properties between (La 0.7Pb0.3MnO3)1-xAgx and (La0.7Pb0.3MnO3)1-x(Fe 2O3)x composites",

abstract = "Ceramic composites of (La0.7Pb0.3MnO 3)1-xAgx and (La0.7Pb 0.3MnO3)1-x(Fe2O3) x are prepared by using chemical and solid-sate sintering route. The structural and magnetotransport properties are studied for these composites. Ferromagnetism is gradually suppressed with the increase of Ag or Fe 2O3 mole percentage for both systems. The resistivity decreases significantly for (La0.7Pb0.3MnO 3)1-xAgx while resistivity increases dramatically for (La0.7Pb0.3MnO3) 1-x(Fe2O3)x. It is suggested that the introduction of Ag into the niche of grain boundaries forms artificial conducting network and improve the carriers to transport. Contrarily, the Fe2O3 in (La0.7Pb0.3MnO 3)1-x(Fe2O3)x composite acts as a separation layer between two grains and forms the artificial tunneling junction. However, the enhancement of magnetoresistance has been observed for both systems.",

author = "Young, {S. L.} and Lin, {C. C.} and Shi, {J. B.} and Chen, {H. Z.} and L. Horng",

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T1 - Comparison of the magnetotransport properties between (La 0.7Pb0.3MnO3)1-xAgx and (La0.7Pb0.3MnO3)1-x(Fe 2O3)x composites

AU - Young, S. L.

AU - Lin, C. C.

AU - Shi, J. B.

AU - Chen, H. Z.

AU - Horng, L.

PY - 2006/6/1

Y1 - 2006/6/1

N2 - Ceramic composites of (La0.7Pb0.3MnO 3)1-xAgx and (La0.7Pb 0.3MnO3)1-x(Fe2O3) x are prepared by using chemical and solid-sate sintering route. The structural and magnetotransport properties are studied for these composites. Ferromagnetism is gradually suppressed with the increase of Ag or Fe 2O3 mole percentage for both systems. The resistivity decreases significantly for (La0.7Pb0.3MnO 3)1-xAgx while resistivity increases dramatically for (La0.7Pb0.3MnO3) 1-x(Fe2O3)x. It is suggested that the introduction of Ag into the niche of grain boundaries forms artificial conducting network and improve the carriers to transport. Contrarily, the Fe2O3 in (La0.7Pb0.3MnO 3)1-x(Fe2O3)x composite acts as a separation layer between two grains and forms the artificial tunneling junction. However, the enhancement of magnetoresistance has been observed for both systems.

AB - Ceramic composites of (La0.7Pb0.3MnO 3)1-xAgx and (La0.7Pb 0.3MnO3)1-x(Fe2O3) x are prepared by using chemical and solid-sate sintering route. The structural and magnetotransport properties are studied for these composites. Ferromagnetism is gradually suppressed with the increase of Ag or Fe 2O3 mole percentage for both systems. The resistivity decreases significantly for (La0.7Pb0.3MnO 3)1-xAgx while resistivity increases dramatically for (La0.7Pb0.3MnO3) 1-x(Fe2O3)x. It is suggested that the introduction of Ag into the niche of grain boundaries forms artificial conducting network and improve the carriers to transport. Contrarily, the Fe2O3 in (La0.7Pb0.3MnO 3)1-x(Fe2O3)x composite acts as a separation layer between two grains and forms the artificial tunneling junction. However, the enhancement of magnetoresistance has been observed for both systems.

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