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

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Article number214424
Pages (from-to)2144241-2144245
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number21
Publication statusPublished - 2003 Jun 1

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Rietveld analysis
X rays
orbitals
x ray analysis
x ray absorption
Temperature
Electrons
electrons
interactions
temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Anomalous variation of A-type antiferromagnetic order and two-dimensional ferromagnetic fluctuation in orbital-ordered La 1-x Eu x MnO 3 . / Chen, C. T.; Lin, B. N.; Hsu, Yung-Yuan; Liao, J. D.; Cheng, W. H.; Lin, C. Y.; Ku, H. C.; Lee, J. F.; Jang, L. Y.; Liu, D. G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 67, No. 21, 214424, 01.06.2003, p. 2144241-2144245.

Research output: Contribution to journalArticle

Chen, CT, Lin, BN, Hsu, Y-Y, Liao, JD, Cheng, WH, Lin, CY, Ku, HC, Lee, JF, Jang, LY & Liu, DG 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, vol. 67, no. 21, 214424, pp. 2144241-2144245.
Chen, C. T. ; Lin, B. N. ; Hsu, Yung-Yuan ; Liao, J. D. ; Cheng, W. H. ; Lin, C. Y. ; Ku, H. C. ; Lee, J. F. ; Jang, L. Y. ; Liu, D. G. / Anomalous variation of A-type antiferromagnetic order and two-dimensional ferromagnetic fluctuation in orbital-ordered La 1-x Eu x MnO 3 In: Physical Review B - Condensed Matter and Materials Physics. 2003 ; Vol. 67, No. 21. pp. 2144241-2144245.
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abstract = "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 N{\'e}el 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.",
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AU - Chen, C. T.

AU - Lin, B. N.

AU - Hsu, Yung-Yuan

AU - Liao, J. D.

AU - Cheng, W. H.

AU - Lin, C. Y.

AU - Ku, H. C.

AU - Lee, J. F.

AU - Jang, L. Y.

AU - Liu, D. G.

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N2 - 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.

AB - 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.

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