Resonant photoemission of transition metal perovskites

W. R. Flavell; A. G. Thomas; D. Tsoutsou; A. K. Mallick; J. Hollingworth; S. Patel; E. A. Seddon; R. L. Stockbauer; R. L. Kurtz; P. T. Sprunger; S. N. Barilo; S. V. Shiryaev; G. L. Bychkov

doi:10.1016/j.elspec.2005.01.149

Resonant photoemission of transition metal perovskites

W. R. Flavell, A. G. Thomas, D. Tsoutsou, A. K. Mallick, J. Hollingworth, S. Patel, E. A. Seddon, R. L. Stockbauer, R. L. Kurtz, P. T. Sprunger, S. N. Barilo, S. V. Shiryaev, G. L. Bychkov

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Abstract

We discuss the use of resonant photoemission in the study of rare earth/transition metal perovskites and perovskite-related structures. We illustrate its application to the assignment of the RE and TM valence band density of states in Nd2Ni1-xCuxO4 and REBaCo2O5+δ. In both cases, the relative positions of the 4f and 3d contributions within the valence band density of states (DOS) relative to the Fermi energy provide a rationalisation of the redox behaviour of the system. We also apply the technique to the determination of the Co spin state in Co(III) perovskites such as LaCoO3 and GdBaCo2O5+δ, where the observation of a delayed Co 3p → 3d resonance is a powerful diagnostic of the Co(III) low spin state. This reveals that while the Co(III) ions in LaCoO3 increasingly populate the low spin state as the sample temperature is lowered, a significant proportion of the Co(III) species in GdBaCo2O5+δ are not in the low spin state at temperatures as low as 50 K. © 2005 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	777-782
Number of pages	5
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	144-147
DOIs	https://doi.org/10.1016/j.elspec.2005.01.149
Publication status	Published - Jun 2005

Keywords

3p threshold
4d threshold
Resonant photoemission
Transition metal/rare earth perovskite

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10.1016/j.elspec.2005.01.149

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Flavell, W. R., Thomas, A. G., Tsoutsou, D., Mallick, A. K., Hollingworth, J., Patel, S., Seddon, E. A., Stockbauer, R. L., Kurtz, R. L., Sprunger, P. T., Barilo, S. N., Shiryaev, S. V., & Bychkov, G. L. (2005). Resonant photoemission of transition metal perovskites. Journal of Electron Spectroscopy and Related Phenomena, 144-147, 777-782. https://doi.org/10.1016/j.elspec.2005.01.149

@article{3739ff86122b495892304b5ac05ec713,

title = "Resonant photoemission of transition metal perovskites",

abstract = "We discuss the use of resonant photoemission in the study of rare earth/transition metal perovskites and perovskite-related structures. We illustrate its application to the assignment of the RE and TM valence band density of states in Nd2Ni1-xCuxO4 and REBaCo2O5+δ. In both cases, the relative positions of the 4f and 3d contributions within the valence band density of states (DOS) relative to the Fermi energy provide a rationalisation of the redox behaviour of the system. We also apply the technique to the determination of the Co spin state in Co(III) perovskites such as LaCoO3 and GdBaCo2O5+δ, where the observation of a delayed Co 3p → 3d resonance is a powerful diagnostic of the Co(III) low spin state. This reveals that while the Co(III) ions in LaCoO3 increasingly populate the low spin state as the sample temperature is lowered, a significant proportion of the Co(III) species in GdBaCo2O5+δ are not in the low spin state at temperatures as low as 50 K. {\textcopyright} 2005 Elsevier B.V. All rights reserved.",

keywords = "3p threshold, 4d threshold, Resonant photoemission, Transition metal/rare earth perovskite",

author = "Flavell, {W. R.} and Thomas, {A. G.} and D. Tsoutsou and Mallick, {A. K.} and J. Hollingworth and S. Patel and Seddon, {E. A.} and Stockbauer, {R. L.} and Kurtz, {R. L.} and Sprunger, {P. T.} and Barilo, {S. N.} and Shiryaev, {S. V.} and Bychkov, {G. L.}",

year = "2005",

month = jun,

doi = "10.1016/j.elspec.2005.01.149",

language = "English",

volume = "144-147",

pages = "777--782",

journal = "Journal of Electron Spectroscopy and Related Phenomena",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Resonant photoemission of transition metal perovskites

AU - Flavell, W. R.

AU - Thomas, A. G.

AU - Tsoutsou, D.

AU - Mallick, A. K.

AU - Hollingworth, J.

AU - Patel, S.

AU - Seddon, E. A.

AU - Stockbauer, R. L.

AU - Kurtz, R. L.

AU - Sprunger, P. T.

AU - Barilo, S. N.

AU - Shiryaev, S. V.

AU - Bychkov, G. L.

PY - 2005/6

Y1 - 2005/6

N2 - We discuss the use of resonant photoemission in the study of rare earth/transition metal perovskites and perovskite-related structures. We illustrate its application to the assignment of the RE and TM valence band density of states in Nd2Ni1-xCuxO4 and REBaCo2O5+δ. In both cases, the relative positions of the 4f and 3d contributions within the valence band density of states (DOS) relative to the Fermi energy provide a rationalisation of the redox behaviour of the system. We also apply the technique to the determination of the Co spin state in Co(III) perovskites such as LaCoO3 and GdBaCo2O5+δ, where the observation of a delayed Co 3p → 3d resonance is a powerful diagnostic of the Co(III) low spin state. This reveals that while the Co(III) ions in LaCoO3 increasingly populate the low spin state as the sample temperature is lowered, a significant proportion of the Co(III) species in GdBaCo2O5+δ are not in the low spin state at temperatures as low as 50 K. © 2005 Elsevier B.V. All rights reserved.

AB - We discuss the use of resonant photoemission in the study of rare earth/transition metal perovskites and perovskite-related structures. We illustrate its application to the assignment of the RE and TM valence band density of states in Nd2Ni1-xCuxO4 and REBaCo2O5+δ. In both cases, the relative positions of the 4f and 3d contributions within the valence band density of states (DOS) relative to the Fermi energy provide a rationalisation of the redox behaviour of the system. We also apply the technique to the determination of the Co spin state in Co(III) perovskites such as LaCoO3 and GdBaCo2O5+δ, where the observation of a delayed Co 3p → 3d resonance is a powerful diagnostic of the Co(III) low spin state. This reveals that while the Co(III) ions in LaCoO3 increasingly populate the low spin state as the sample temperature is lowered, a significant proportion of the Co(III) species in GdBaCo2O5+δ are not in the low spin state at temperatures as low as 50 K. © 2005 Elsevier B.V. All rights reserved.

KW - 3p threshold

KW - 4d threshold

KW - Resonant photoemission

KW - Transition metal/rare earth perovskite

U2 - 10.1016/j.elspec.2005.01.149

DO - 10.1016/j.elspec.2005.01.149

M3 - Article

VL - 144-147

SP - 777

EP - 782

JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

ER -

Resonant photoemission of transition metal perovskites

Abstract

Keywords

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