Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods

A. Braun; B. S. Mun; Y. Sun; Z. Liu; O. Gröning; R. Mäder; S. Erat; X. Zhang; S. S. Mao; E. Pomjakushina; K. Conder; T. Graule

doi:10.1016/j.elspec.2010.05.024

Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods

A. Braun
, B. S. Mun
, Y. Sun
, Z. Liu
, O. Gröning
, R. Mäder
, S. Erat
, X. Zhang
, S. S. Mao
, E. Pomjakushina
, K. Conder
, T. Graule

Mechanical & Nuclear Engineering

Empa – Swiss Federal Laboratories for Materials Science and Technology
Lawrence Berkeley National Laboratory
Hanyang University ERICA Campus
Stanford Synchrotron Radiation Lightsource
ETH Zurich
University of California, Berkeley
Paul Scherrer Institut
TU Bergakademie Freiberg

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

10 Scopus citations

Abstract

A single crystal monolith of La_0.9Sr_0.1FeO ₃ and thin pulsed laser deposited film of La_0.8Sr _0.2Fe_0.8Ni_0.2O₃ were subject to angle integrated valence band photoemission spectroscopy in ultra high vacuum and conductivity experiments in ambient air at temperatures from 300 K to 800 K. Except for several sputtering and annealing cycles, the specimens were not prepared in situ. Peculiar changes in the temperature dependent, bulk representative conductivity profile as a result of reversible phase transitions, and irreversible chemical changes are semi-quantitatively reflected by the intensity variation in the more surface representative valence band spectra near the Fermi energy. X-ray photoelectron diffraction images reflect the symmetry as expected from bulk iron perovskites. The correlation of spectral details in the valence band photoemission spectra (VB PES) and details of the conductivity during temperature variation suggest that valuable information on electronic structure and transport properties of complex materials may be obtained without in situ preparation.

Original language	British English
Pages (from-to)	56-62
Number of pages	7
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	181
Issue number	1
DOIs	https://doi.org/10.1016/j.elspec.2010.05.024
State	Published - Jul 2010

Keywords

Cathode material
Conductivity
High temperature
Metal-insulator transition
Perovskite
Photoemission spectroscopy
Valence band

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Braun, A., Mun, B. S., Sun, Y., Liu, Z., Gröning, O., Mäder, R., Erat, S., Zhang, X., Mao, S. S., Pomjakushina, E., Conder, K., & Graule, T. (2010). Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods. Journal of Electron Spectroscopy and Related Phenomena, 181(1), 56-62. https://doi.org/10.1016/j.elspec.2010.05.024

@article{df2420b6533e4455aa01dda57ad144af,

title = "Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods",

abstract = "A single crystal monolith of La0.9Sr0.1FeO 3 and thin pulsed laser deposited film of La0.8Sr 0.2Fe0.8Ni0.2O3 were subject to angle integrated valence band photoemission spectroscopy in ultra high vacuum and conductivity experiments in ambient air at temperatures from 300 K to 800 K. Except for several sputtering and annealing cycles, the specimens were not prepared in situ. Peculiar changes in the temperature dependent, bulk representative conductivity profile as a result of reversible phase transitions, and irreversible chemical changes are semi-quantitatively reflected by the intensity variation in the more surface representative valence band spectra near the Fermi energy. X-ray photoelectron diffraction images reflect the symmetry as expected from bulk iron perovskites. The correlation of spectral details in the valence band photoemission spectra (VB PES) and details of the conductivity during temperature variation suggest that valuable information on electronic structure and transport properties of complex materials may be obtained without in situ preparation.",

keywords = "Cathode material, Conductivity, High temperature, Metal-insulator transition, Perovskite, Photoemission spectroscopy, Valence band",

author = "A. Braun and Mun, \{B. S.\} and Y. Sun and Z. Liu and O. Gr{\"o}ning and R. M{\"a}der and S. Erat and X. Zhang and Mao, \{S. S.\} and E. Pomjakushina and K. Conder and T. Graule",

note = "Funding Information: Financial support by the European Commission (MIRG \# CT-2006-042095 and Real-SOFC \# SES6-CT-2003-502612) and the Swiss National Science Foundation (SNF \# 200021-116688) and Swiss NCCR Manep are acknowledged. The ALS is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Part of this research was carried out at the Stanford Synchrotron Radiation Lightsource, a national user facility operated by Stanford University on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences.",

year = "2010",

month = jul,

doi = "10.1016/j.elspec.2010.05.024",

language = "British English",

volume = "181",

pages = "56--62",

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

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}

Braun, A, Mun, BS, Sun, Y, Liu, Z, Gröning, O, Mäder, R, Erat, S, Zhang, X, Mao, SS, Pomjakushina, E, Conder, K & Graule, T 2010, 'Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods', Journal of Electron Spectroscopy and Related Phenomena, vol. 181, no. 1, pp. 56-62. https://doi.org/10.1016/j.elspec.2010.05.024

Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods. / Braun, A.; Mun, B. S.; Sun, Y. et al.
In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 181, No. 1, 07.2010, p. 56-62.

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

TY - JOUR

T1 - Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K

T2 - Comparison of surface and bulk sensitive methods

AU - Braun, A.

AU - Mun, B. S.

AU - Sun, Y.

AU - Liu, Z.

AU - Gröning, O.

AU - Mäder, R.

AU - Erat, S.

AU - Zhang, X.

AU - Mao, S. S.

AU - Pomjakushina, E.

AU - Conder, K.

AU - Graule, T.

N1 - Funding Information: Financial support by the European Commission (MIRG # CT-2006-042095 and Real-SOFC # SES6-CT-2003-502612) and the Swiss National Science Foundation (SNF # 200021-116688) and Swiss NCCR Manep are acknowledged. The ALS is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Part of this research was carried out at the Stanford Synchrotron Radiation Lightsource, a national user facility operated by Stanford University on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences.

PY - 2010/7

Y1 - 2010/7

N2 - A single crystal monolith of La0.9Sr0.1FeO 3 and thin pulsed laser deposited film of La0.8Sr 0.2Fe0.8Ni0.2O3 were subject to angle integrated valence band photoemission spectroscopy in ultra high vacuum and conductivity experiments in ambient air at temperatures from 300 K to 800 K. Except for several sputtering and annealing cycles, the specimens were not prepared in situ. Peculiar changes in the temperature dependent, bulk representative conductivity profile as a result of reversible phase transitions, and irreversible chemical changes are semi-quantitatively reflected by the intensity variation in the more surface representative valence band spectra near the Fermi energy. X-ray photoelectron diffraction images reflect the symmetry as expected from bulk iron perovskites. The correlation of spectral details in the valence band photoemission spectra (VB PES) and details of the conductivity during temperature variation suggest that valuable information on electronic structure and transport properties of complex materials may be obtained without in situ preparation.

AB - A single crystal monolith of La0.9Sr0.1FeO 3 and thin pulsed laser deposited film of La0.8Sr 0.2Fe0.8Ni0.2O3 were subject to angle integrated valence band photoemission spectroscopy in ultra high vacuum and conductivity experiments in ambient air at temperatures from 300 K to 800 K. Except for several sputtering and annealing cycles, the specimens were not prepared in situ. Peculiar changes in the temperature dependent, bulk representative conductivity profile as a result of reversible phase transitions, and irreversible chemical changes are semi-quantitatively reflected by the intensity variation in the more surface representative valence band spectra near the Fermi energy. X-ray photoelectron diffraction images reflect the symmetry as expected from bulk iron perovskites. The correlation of spectral details in the valence band photoemission spectra (VB PES) and details of the conductivity during temperature variation suggest that valuable information on electronic structure and transport properties of complex materials may be obtained without in situ preparation.

KW - Cathode material

KW - Conductivity

KW - High temperature

KW - Metal-insulator transition

KW - Perovskite

KW - Photoemission spectroscopy

KW - Valence band

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U2 - 10.1016/j.elspec.2010.05.024

DO - 10.1016/j.elspec.2010.05.024

M3 - Article

AN - SCOPUS:77955413801

SN - 0368-2048

VL - 181

SP - 56

EP - 62

JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

IS - 1

ER -

Braun A, Mun BS, Sun Y, Liu Z, Gröning O, Mäder R et al. Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods. Journal of Electron Spectroscopy and Related Phenomena. 2010 Jul;181(1):56-62. doi: 10.1016/j.elspec.2010.05.024

Correlation of conductivity and angle integrated valence band photoemission characteristics in single crystal iron perovskites for 300 K < T < 800 K: Comparison of surface and bulk sensitive methods

Abstract

Keywords

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