2D ferromagnetic fluctuation above TN in orbital-ordered LaMnO3

C. T. Chen; H. H. Wu; B. N. Lin; Y. Y. Hsu; H. C. Ku

doi:10.1016/S0921-4526(02)02596-6

2D ferromagnetic fluctuation above TN in orbital-ordered LaMnO₃

C. T. Chen^*, H. H. Wu, B. N. Lin, Y. Y. Hsu, H. C. Ku

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Onset of two-dimensional (2D) ferromagnetic (FM) short-range order with T_2D≃150 K above A-type antiferromagnetic (AF) Néel temperature T_N = 139 K was observed in 100 G low field for orbital-ordered LaMnO₃. The A-type AF long-range order is stabilized through strong 2D basal plane FM superexchange coupling of orbital-ordered e_g electrons and weak c-axis AF coupling. Both T_2D and T_N are field dependent, and merge in 1 T high field around 130 K. Mn K-edge X-ray absorption near-edge spectrum for orbital-ordered LaMnO ₃ at room temperature indicates a pre-edge splitting of 2.0 eV due to weakly allowed 1s-3d dipole transition.

Original language	English
Pages (from-to)	829-830
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	329-333
Issue number	II
DOIs	https://doi.org/10.1016/S0921-4526(02)02596-6
Publication status	Published - 2003 May
Externally published	Yes

Keywords

2D FM short range fluctuation
A-type AF order
Orbital order

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4526(02)02596-6

Cite this

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title = "2D ferromagnetic fluctuation above TN in orbital-ordered LaMnO3",

abstract = "Onset of two-dimensional (2D) ferromagnetic (FM) short-range order with T2D≃150 K above A-type antiferromagnetic (AF) N{\'e}el temperature TN = 139 K was observed in 100 G low field for orbital-ordered LaMnO3. The A-type AF long-range order is stabilized through strong 2D basal plane FM superexchange coupling of orbital-ordered eg electrons and weak c-axis AF coupling. Both T2D and TN are field dependent, and merge in 1 T high field around 130 K. Mn K-edge X-ray absorption near-edge spectrum for orbital-ordered LaMnO 3 at room temperature indicates a pre-edge splitting of 2.0 eV due to weakly allowed 1s-3d dipole transition.",

keywords = "2D FM short range fluctuation, A-type AF order, Orbital order",

author = "Chen, {C. T.} and Wu, {H. H.} and Lin, {B. N.} and Hsu, {Y. Y.} and Ku, {H. C.}",

year = "2003",

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doi = "10.1016/S0921-4526(02)02596-6",

language = "English",

volume = "329-333",

pages = "829--830",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "II",

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TY - JOUR

T1 - 2D ferromagnetic fluctuation above TN in orbital-ordered LaMnO3

AU - Chen, C. T.

AU - Wu, H. H.

AU - Lin, B. N.

AU - Hsu, Y. Y.

AU - Ku, H. C.

PY - 2003/5

Y1 - 2003/5

N2 - Onset of two-dimensional (2D) ferromagnetic (FM) short-range order with T2D≃150 K above A-type antiferromagnetic (AF) Néel temperature TN = 139 K was observed in 100 G low field for orbital-ordered LaMnO3. The A-type AF long-range order is stabilized through strong 2D basal plane FM superexchange coupling of orbital-ordered eg electrons and weak c-axis AF coupling. Both T2D and TN are field dependent, and merge in 1 T high field around 130 K. Mn K-edge X-ray absorption near-edge spectrum for orbital-ordered LaMnO 3 at room temperature indicates a pre-edge splitting of 2.0 eV due to weakly allowed 1s-3d dipole transition.

AB - Onset of two-dimensional (2D) ferromagnetic (FM) short-range order with T2D≃150 K above A-type antiferromagnetic (AF) Néel temperature TN = 139 K was observed in 100 G low field for orbital-ordered LaMnO3. The A-type AF long-range order is stabilized through strong 2D basal plane FM superexchange coupling of orbital-ordered eg electrons and weak c-axis AF coupling. Both T2D and TN are field dependent, and merge in 1 T high field around 130 K. Mn K-edge X-ray absorption near-edge spectrum for orbital-ordered LaMnO 3 at room temperature indicates a pre-edge splitting of 2.0 eV due to weakly allowed 1s-3d dipole transition.

KW - 2D FM short range fluctuation

KW - A-type AF order

KW - Orbital order

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