Correlation between Extrinsic Electroresistance and Magnetoresistance in Fine-Grained La0.7Ca0.3MnO3

スポンサーリンク

概要

• 論文の詳細を見る

• We report our observation of a correlation between the extrinsic electroresistance (EER) and magnetoresistance (EMR) via grain size in fine-grained La0.7Ca0.3MnO3. The nature of dependence of EER and EMR on grain size (${\sim}0.2--1.0$ μm) indicates that for finer grains with low-resistive boundaries both of them follow similar trend whereas they differ for coarser grains with high-resistive boundaries. This could be due to a crossover in the mechanism of charge transport across the grain boundaries — from spin-dependent scattering process to spin-polarized tunneling one — as a function of grain size.

• 2010-08-25

著者

• Karmakar Shilpi

  Department of Solid State Physics, Indian Association for the Cultivation of Science, Kolkata 700032, India

• Devi Parukuttyamma

  Nanostructured Materials Division, Central Glass and Ceramic Research Institute, CSIR, Kolkata 700032, India

• Kumar Abhoy

  Nanostructured Materials Division, Central Glass and Ceramic Research Institute, CSIR, Kolkata 700032, India

• Bhattacharya Dipten

  Nanostructured Materials Division, Central Glass and Ceramic Research Institute, CSIR, Kolkata 700032, India

• Chaudhuri Bijoy

  Department of Solid State Physics, Indian Association for the Cultivation of Science, Kolkata 700032, India

関連論文

• Correlation between Extrinsic Electroresistance and Magnetoresistance in Fine-Grained La0.7Ca0.3MnO3

スポンサーリンク