Magnetoresistance effect in isotropie RE1-x Srx Mn1-y TMy O3 ( RE=La, Pr, Nd, Sm ; TM= 3d transition metal ) ceramics

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

Research output: Contribution to journalArticle

Abstract

Bulk samples of RE1-xSrxMn1-yTMyO3 (RE=La, Pr, Nd, Sm ; TM= 3d transition metal) ceramics were prepared by using conventional ceramic techniques, and the magnetic/ electric properties and the magnetoresistance effects defined as Δρ/ρo = (ρHo)/ρo where ρo is the zero field resistivity and pu is the resistivity in applied magnetic field, were systematically investigated. All studied samples ( x=l/3 ) showed perovskite-like structure. For examples, Pr2/3 St1/3 MnO3 sample sintered at 1573K showed MR ratio of -10% at room temperature, and Sm2/3 Sr1/3 MnO3 sample showed MR ratio of -80% at 77K. Then MR ratio tends to have a maximum around the Curie temperature of the sample. The MR values of the samples for substituting Mn of B-site ions by the other 3d transition metals, such as LaMn4/5 V1/5 O3 and LaMn4/5Cr1/5 O3 are -24% at 120Kand -15% at 140Krespectively.

Original languageEnglish
Pages (from-to)458-461
Number of pages4
JournalMaterials Transactions, JIM
Volume37
Issue number3
DOIs
Publication statusPublished - 1996 Jan 1

Keywords

  • Isotropie perovskite-like ceramics
  • MR peak temperature
  • MR ratio
  • Resistivity

ASJC Scopus subject areas

  • Engineering(all)

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