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

Research output: Contribution to journalConference article

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.

Original languageEnglish
Pages (from-to)1817-1824
Number of pages8
JournalInternational SAMPE Symposium and Exhibition (Proceedings)
Volume50
Publication statusPublished - 2005 Dec 1
Event50th International SAMPE Symposium and Exhibition - Long Beach, CA, United States
Duration: 2005 May 12005 May 5

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this