Chemical Pressure Effects of Cation Size Variation in Layered Manganites

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概要

• 論文の詳細を見る

• We have investigated the electric and magnetic properties of the layered manganite (La1-yRy)2-2xSr1+2xMn2O7 (R=Pr, Nd, Sm, Eu, Gd; x=0.3) with the fixed doping concentration. The average ionic radius of the La/Sr site <rA > is varied by the replacement of the La ion with different rare earth ion. For <rA >∼1.3963 Å, we observed the metal-insulator transition accompanied by the ferromagnetic (FM) ordering near 75 K and subsequently the spin-glass-like transition near 30 K. For <rA >≤1.3895 Å, the metallic FM state disappears and instead the non-metallic spin-glass-like phase appears around 30 K. With decreasing <rA >, the FM double exchange interaction is weakened and resultantly the antiferromagnetic (AFM) superexchange interaction is developed. These magnetic and transport properties in the layered manganite system are found to be primarily dependent on the size of <rA >.

• Physical Society of Japanの論文
• 2001-08-15

著者

• Choi Hong

  Center For Cmr Materials Research Institute Of Standards And Science

• Kim Wan

  Center For Cmr Materials Korea Research Institute Of Standards And Science

• Chi Eun

  Center For Cmr Materials Korea Research Institute Of Standards And Science

• Dho Joonghoe

  Center For Cmr Materials Research Institute Of Standards And Science

• Hur Nam

  Center For Cmr Materials Korea Research Institute Of Standards And Science

• Hur Nam

  Center for CMR materials, Korea Research Institute of Standards and Science,

• Dho Joonghoe

  Center for CMR materials, Korea Research Institute of Standards and Science,

• Chi Eun

  Center for CMR materials, Korea Research Institute of Standards and Science,

関連論文

• Magnetic Glassiness below Curie Temperature in La_Ca_MnO_3
• Chemical Pressure Effects of Cation Size Variation in Layered Manganites
• Chemical Pressure Effects of Cation Size Variation in Layered Manganites

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