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

Research output: Contribution to journalArticle

10 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1682-1686
Number of pages5
JournalMaterials Letters
Volume60
Issue number13-14
DOIs
Publication statusPublished - 2006 Jun 1

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Galvanomagnetic effects
composite materials
Composite materials
electrical resistivity
Ferromagnetism
Magnetoresistance
ferromagnetism
sintering
Grain boundaries
Sintering
grain boundaries
routes
ceramics
conduction
augmentation

All Science Journal Classification (ASJC) codes

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

Cite this

Young, S. L. ; Lin, C. C. ; Shi, J. B. ; Chen, H. Z. ; Horng, L. / Comparison of the magnetotransport properties between (La 0.7Pb0.3MnO3)1-xAgx and (La0.7Pb0.3MnO3)1-x(Fe 2O3)x composites. In: Materials Letters. 2006 ; Vol. 60, No. 13-14. pp. 1682-1686.
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Comparison of the magnetotransport properties between (La 0.7Pb0.3MnO3)1-xAgx and (La0.7Pb0.3MnO3)1-x(Fe 2O3)x composites. / Young, S. L.; Lin, C. C.; Shi, J. B.; Chen, H. Z.; Horng, L.

In: Materials Letters, Vol. 60, No. 13-14, 01.06.2006, p. 1682-1686.

Research output: Contribution to journalArticle

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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.

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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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