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首页> 外文期刊>Journal of Materials Research >Electrical transport in the ferromagnetic state of silver substituted manganites La_(1-x)Ag_xMnO_3 (x = 0.05 and 0.1)
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Electrical transport in the ferromagnetic state of silver substituted manganites La_(1-x)Ag_xMnO_3 (x = 0.05 and 0.1)

机译：银取代的锰酸盐La_（1-x）Ag_xMnO_3（x = 0.05和0.1）在铁磁状态下的电传输

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摘要

The present study focuses on a quantitative analysis of electrical resistivity in monovalent-doped manganites La_(1-x)Ag_gMnO_3 (x = 0.05 and 0.1). The electrical resistivity data in the ferromagnetic (FM) metallic phase are analyzed by considering a temperature-independent inelastic scattering of the electrons (due to domain and grain boundaries, defects, etc.) and other temperature-dependent elastic scattering mechanisms (electron-electron, electron-phonon, and electron-magnon). The Debye and Einstein temperatures are deduced from the model Hamiltonian containing potential energy contribution from the long-range Coulomb, van der Waals (vdW) interaction, and short-range repulsive interaction up to the second-neighbor ions. The electron-phonon scattering partially describes the reported FM metallic resistivity behavior with temperature for La_(1-x)Ag_xMnO_3 (x = 0.05 and 0.1). The T~2 and T~(4.5) terms accounting for electron-electron and electron-magnon interactions are essential for the correct description of resistivity. The Mott-Ioffe-Regel criterion for metallic conductivity is valid, and k_Fl ～ 1, ε_Fτ ～ 1.
机译：本研究集中于单价掺杂锰La_（1-x）Ag_gMnO_3（x = 0.05和0.1）中电阻率的定量分析。通过考虑电子的与温度无关的非弹性散射（由于畴和晶界，缺陷等）和其他与温度有关的弹性散射机理（电子-电子）来分析铁磁（FM）金属相中的电阻率数据，电子声子和电子磁子）。 Debye和Einstein温度是从哈密顿量模型推导出的，该模型包含从远距离库仑，范德华力（vdW）相互作用以及直至第二个相邻离子的短程排斥相互作用的势能。电子声子散射部分地描述了La_（1-x）Ag_xMnO_3（x = 0.05和0.1）随温度的FM金属电阻率行为。解释电子-电子和电子-磁振子相互作用的T〜2和T〜（4.5）项对于正确描述电阻率至关重要。金属电导率的Mott-Ioffe-Regel准则有效，k_Fl〜1，ε_Fτ〜1。

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  • 来源
    《Journal of Materials Research》 |2015年第5期|654-665|共12页
  • 作者

    Dinesh Varshney; Dinesh Choudhary; Elias Khan;

  • 作者单位

    Materials Science Laboratory, School of Physics, Devi Ahilya University, Indore 452001, India;

    Materials Science Laboratory, School of Physics, Devi Ahilya University, Indore 452001, India;

    Materials Science Laboratory, School of Physics, Devi Ahilya University, Indore 452001, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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