Anomalous variation of A-type antiferromagnetic order and two-dimensional ferromagnetic fluctuation in orbital-ordered La 1-x Eu x MnO 3

C. T. Chen, B. N. Lin, Yung-Yuan Hsu, J. D. Liao, W. H. Cheng, C. Y. Lin, H. C. Ku, J. F. Lee, L. Y. Jang, D. G. Liu

研究成果: 雜誌貢獻文章

摘要

A-type antiferromagnetic (AF) order with a two-dimensional (2D) ferromagnetic short-range fluctuation was observed in the stoichiometric orthorhombic La 1-x Eu x MnO 3+δ system (0≤x≤1, δ∼0 with trivalent Mn 3+ ). The observation of strong basal plane ferromagnetic coupling of the A-type AF order with fluctuation above antiferromagnetic Néel temperature T N strongly indicates a C-type orbital ordering of e g electrons at higher temperature throughout the whole system. Anomalous decrease of T N from 139 K for LaMnO 3 , to 91 K for La 0.5 Eu 0.5 MnO 3 and down to 42 K for EuMnO 3 is the result of weaker anisotropic superexchange interaction due to stronger Jahn-Teller lattice distortion in orbital-ordered EuMnO 3 from power x-ray Rietveld analysis and Mn K-edge x-ray absorption near-edge structure spectroscopic study.

原文英語
文章編號214424
頁(從 - 到)2144241-2144245
頁數5
期刊Physical Review B - Condensed Matter and Materials Physics
67
發行號21
出版狀態已發佈 - 2003 六月 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Chen, C. T., Lin, B. N., Hsu, Y-Y., Liao, J. D., Cheng, W. H., Lin, C. Y., Ku, H. C., Lee, J. F., Jang, L. Y., & Liu, D. G. (2003). Anomalous variation of A-type antiferromagnetic order and two-dimensional ferromagnetic fluctuation in orbital-ordered La 1-x Eu x MnO 3 Physical Review B - Condensed Matter and Materials Physics, 67(21), 2144241-2144245. [214424].