Structural, transport, magnetic properties and Raman spectroscopy of orthorhombic Y1-xCaxMnO3 (0≤x≤0.5)

M. N. Iliev, B. Lorenz, A. P. Litvinchuk, Y. Q. Wang, Y. Y. Sun, C. W. Chu

研究成果: Article同行評審

36 引文 斯高帕斯(Scopus)

摘要

Orthorhombic Y1-xCaxMnO3 (0≤x≤0.5) was prepared, and the variations with x of its structural, magnetic, and electrical properties and the polarized Raman spectra were investigated. The lattice parameters change systematically with x. Although there are strong indications for increasing disorder above x = 0.20, the average structure remains orthorhombic in the whole substitutional range. Ca doping increases the conductivity, but the temperature dependence of resistivity ρ(T) remains semiconducting for all x. The average magnetic exchange interaction changes from antiferromagnetic for x<0.08 to ferromagnetic for x>0.08. The evolution with x of the Raman spectra provides evidence for an increasingly disordered oxygen sublattice at x≥0.10, presumably due to quasistatic and/or dynamical Jahn-Teller distortions.

原文English
頁(從 - 到)3333-3341
頁數9
期刊Journal of Physics Condensed Matter
17
發行號21
DOIs
出版狀態Published - 2005 6月 1

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學

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