Synthesis of magnetic properties in composites la0.7Pb 0.3MnO3/Ag and la0.7Pb0.3MnO 3/Fe2O3

S. L. Young; H. Z. Chen; J. Y. Shen; Lance Horng; Y. W. Ho; J. B. Shi; C. C. Lin

Synthesis of magnetic properties in composites la_0.7Pb _0.3MnO₃/Ag and la_0.7Pb_0.3MnO ₃/Fe₂O₃

S. L. Young, H. Z. Chen, J. Y. Shen, Lance Horng, Y. W. Ho, J. B. Shi, C. C. Lin

Department of Physics

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

Abstract

Ceramic composites of La_0.7Pb_0.3MnO₃/Ag and La_0.3Pb_0.3MnO₃/Fe₂O₃ 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_0.3MnO₃/Ag while resistivity increases dramatically for La_0.7Pb _0.3MnO₃/Fe₂O₃. It is suggested that the introduction of Ag into the niche of grain boundaries form artificial conducting network and improve the carriers to transport. Contrarily, the Fe₂O₃ in La_0.7Pb_0.3MnO ₃/Fe₂O₃ 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)	1817-1824
Number of pages	8
Journal	International SAMPE Symposium and Exhibition (Proceedings)
Volume	50
Publication status	Published - 2005 Dec 1
Event	50th International SAMPE Symposium and Exhibition - Long Beach, CA, United States Duration: 2005 May 1 → 2005 May 5

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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@article{44f6bb4fe3ef476092ace152c7cb0d11,

title = "Synthesis of magnetic properties in composites la0.7Pb 0.3MnO3/Ag and la0.7Pb0.3MnO 3/Fe2O3",

abstract = "Ceramic composites of La0.7Pb0.3MnO3/Ag and La0.3Pb0.3MnO3/Fe2O3 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 La0.7Pb0.3MnO3/Ag while resistivity increases dramatically for La0.7Pb 0.3MnO3/Fe2O3. It is suggested that the introduction of Ag into the niche of grain boundaries form artificial conducting network and improve the carriers to transport. Contrarily, the Fe2O3 in La0.7Pb0.3MnO 3/Fe2O3 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 Chen, {H. Z.} and Shen, {J. Y.} and Lance Horng and Ho, {Y. W.} and Shi, {J. B.} and Lin, {C. C.}",

year = "2005",

month = dec,

day = "1",

language = "English",

volume = "50",

pages = "1817--1824",

journal = "International SAMPE Symposium and Exhibition",

issn = "0891-0138",

publisher = "Soc. for the Advancement of Material and Process Engineering",

note = "50th International SAMPE Symposium and Exhibition ; Conference date: 01-05-2005 Through 05-05-2005",

}

TY - JOUR

T1 - Synthesis of magnetic properties in composites la0.7Pb 0.3MnO3/Ag and la0.7Pb0.3MnO 3/Fe2O3

AU - Young, S. L.

AU - Chen, H. Z.

AU - Shen, J. Y.

AU - Horng, Lance

AU - Ho, Y. W.

AU - Shi, J. B.

AU - Lin, C. C.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - Ceramic composites of La0.7Pb0.3MnO3/Ag and La0.3Pb0.3MnO3/Fe2O3 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 La0.7Pb0.3MnO3/Ag while resistivity increases dramatically for La0.7Pb 0.3MnO3/Fe2O3. It is suggested that the introduction of Ag into the niche of grain boundaries form artificial conducting network and improve the carriers to transport. Contrarily, the Fe2O3 in La0.7Pb0.3MnO 3/Fe2O3 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 La0.7Pb0.3MnO3/Ag and La0.3Pb0.3MnO3/Fe2O3 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 La0.7Pb0.3MnO3/Ag while resistivity increases dramatically for La0.7Pb 0.3MnO3/Fe2O3. It is suggested that the introduction of Ag into the niche of grain boundaries form artificial conducting network and improve the carriers to transport. Contrarily, the Fe2O3 in La0.7Pb0.3MnO 3/Fe2O3 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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M3 - Conference article

AN - SCOPUS:31944439330

VL - 50

SP - 1817

EP - 1824

JO - International SAMPE Symposium and Exhibition

JF - International SAMPE Symposium and Exhibition

SN - 0891-0138

T2 - 50th International SAMPE Symposium and Exhibition

Y2 - 1 May 2005 through 5 May 2005

ER -