Stabilization of charge ordering in La1/3Sr2/3FeO3δ-Î by magnetic exchange

R. J. McQueeney; J. Ma; S. Chang; J. Q. Yan; M. Hehlen; F. Trouw

doi:10.1103/PhysRevLett.98.126402

Stabilization of charge ordering in La1/3Sr2/3FeO3δ-Î by magnetic exchange

R. J. McQueeney, J. Ma, S. Chang, J. Q. Yan, M. Hehlen, F. Trouw

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

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Abstract

The magnetic exchange energies in charge ordered La1/3Sr2/3FeO3δ-I (LSFO) and its parent compound LaFeO3 (LFO) have been determined by inelastic neutron scattering. In LSFO, the measured ratio of ferromagnetic exchange between Fe3+-Fe5+ pairs (JF) and antiferromagnetic exchange between Fe3+-Fe3+ pairs (JAF) fulfills the criterion for charge ordering driven by magnetic interactions (|JF/JAF|>1). The 30% reduction of JAF as compared to LFO indicates that doped holes are delocalized, and charge ordering occurs without a dominant influence from Coulomb interactions.

Original language	English
Article number	126402
Journal	Physical Review Letters
Volume	98
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.98.126402
State	Published - Mar 20 2007
Externally published	Yes

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10.1103/PhysRevLett.98.126402

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title = "Stabilization of charge ordering in La1/3Sr2/3FeO3δ-{\^I} by magnetic exchange",

abstract = "The magnetic exchange energies in charge ordered La1/3Sr2/3FeO3δ-I (LSFO) and its parent compound LaFeO3 (LFO) have been determined by inelastic neutron scattering. In LSFO, the measured ratio of ferromagnetic exchange between Fe3+-Fe5+ pairs (JF) and antiferromagnetic exchange between Fe3+-Fe3+ pairs (JAF) fulfills the criterion for charge ordering driven by magnetic interactions (|JF/JAF|>1). The 30% reduction of JAF as compared to LFO indicates that doped holes are delocalized, and charge ordering occurs without a dominant influence from Coulomb interactions.",

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AU - McQueeney, R. J.

AU - Ma, J.

AU - Chang, S.

AU - Yan, J. Q.

AU - Hehlen, M.

AU - Trouw, F.

PY - 2007/3/20

Y1 - 2007/3/20

N2 - The magnetic exchange energies in charge ordered La1/3Sr2/3FeO3δ-I (LSFO) and its parent compound LaFeO3 (LFO) have been determined by inelastic neutron scattering. In LSFO, the measured ratio of ferromagnetic exchange between Fe3+-Fe5+ pairs (JF) and antiferromagnetic exchange between Fe3+-Fe3+ pairs (JAF) fulfills the criterion for charge ordering driven by magnetic interactions (|JF/JAF|>1). The 30% reduction of JAF as compared to LFO indicates that doped holes are delocalized, and charge ordering occurs without a dominant influence from Coulomb interactions.

AB - The magnetic exchange energies in charge ordered La1/3Sr2/3FeO3δ-I (LSFO) and its parent compound LaFeO3 (LFO) have been determined by inelastic neutron scattering. In LSFO, the measured ratio of ferromagnetic exchange between Fe3+-Fe5+ pairs (JF) and antiferromagnetic exchange between Fe3+-Fe3+ pairs (JAF) fulfills the criterion for charge ordering driven by magnetic interactions (|JF/JAF|>1). The 30% reduction of JAF as compared to LFO indicates that doped holes are delocalized, and charge ordering occurs without a dominant influence from Coulomb interactions.

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JO - Physical Review Letters

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Stabilization of charge ordering in La1/3Sr2/3FeO3δ-Î by magnetic exchange

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