Large magnetoresistance effect in polycrystalline isotropie LA-AM-MN-O ceramics (AM=Na, K, Rb, Cs)

Masaaki Imura, Takahiro Takahashi, Hitoshi Takamura, Terumi Tanaka, Satoshi Sugimoto, Motofumi Homma, Masuo Okada

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Polycrystalline isotropic perovskite-like La5/6AM1/6MnO3 (AM=Na, K, Rb, Cs) partially substituted trivalent La3+ for monovalent cations were fabricated by conventional ceramics techniques and their magnetoresistance effects in addition to magnetic/electrical properties were studied. The all studied samples show magnetization as large as about 100-110 μWb-m-kg-1 at 77 K and high electrical conductivity of 10-3 Ω-m order at 300 K. At room temperature polycrystalline isotropic La5/6K1/6MnO3 shows large negative magnetoresistance effect Δp/ρ0= -20 % when magnetic field of 1. 5 T is applied. This value is larger than the previously reported values for La1-xMexMnO3 (Me=divalent cations) polycrystalline ceramics.

Original languageEnglish
Pages (from-to)1219-1223
Number of pages5
JournalMaterials Transactions, JIM
Volume37
Issue number5
DOIs
Publication statusPublished - 1996 Jan 1

Keywords

  • Alkaline-metal
  • Magnetoresistance effect
  • Manganite
  • Monovalent cation
  • Perovskile structure
  • Polycrystalline isotropic ceramics

ASJC Scopus subject areas

  • Engineering(all)

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