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

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

Department of Physics

Research output: Contribution to journal › Article

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 language	English
Article number	214424
Pages (from-to)	2144241-2144245
Number of pages	5
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	67
Issue number	21
Publication status	Published - 2003 Jun 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].

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 journal › Article

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 CT, Lin BN, Hsu Y-Y, Liao JD, Cheng WH, Lin CY et al. 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. 2003 Jun 1;67(21):2144241-2144245. 214424.

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

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. ",

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

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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.

PY - 2003/6/1

Y1 - 2003/6/1

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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