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 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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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
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TY - JOUR
T1 - Anomalous variation of A-type antiferromagnetic order and two-dimensional ferromagnetic fluctuation in orbital-ordered La 1-x Eu x MnO 3
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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M3 - Article
VL - 67
SP - 2144241
EP - 2144245
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 21
M1 - 214424
ER -