Electronic-structure modifications induced by surface segregation in La0.65Pb0.35MnO3 thin films

C. N. Borca; B. Xu; T. Komesu; H. K. Jeong; M. T. Liu; S. H. Liou; S. Stabler; Y. Idzerda; P. A. Dowben

doi:10.1209/epl/i2001-00580-y

Electronic-structure modifications induced by surface segregation in La_0.65Pb_0.35MnO₃ thin films

C. N. Borca, B. Xu, T. Komesu, H. K. Jeong, M. T. Liu, S. H. Liou, S. Stabler, Y. Idzerda, P. A. Dowben

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

19 Scopus citations

Abstract

Using spin-polarized inverse photoemission and X-ray absorption spectroscopy techniques, we show that the electronic structure of La_0.65Pb_0.35MnO₃ thin films depends on the composition at the surface. With a gentle annealing procedure, the surface provides a maximum of 80% spin asymmetry at 0.5 eV above the Fermi level in spite of extensive Pb segregation. A heavily annealed (restructured) surface exhibits a reduced surface "ordering" temperature of 240 K (compared to the approximately 335 K bulk value) as well as a reduced spin asymmetry value of 40% at 0.5 eV above Fermi energy.

Original language	English (US)
Pages (from-to)	722-728
Number of pages	7
Journal	EPL
Volume	56
Issue number	5
DOIs	https://doi.org/10.1209/epl/i2001-00580-y
State	Published - Dec 1 2001

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Electronic-structure modifications induced by surface segregation in La0.65Pb0.35MnO3 thin films",

abstract = "Using spin-polarized inverse photoemission and X-ray absorption spectroscopy techniques, we show that the electronic structure of La0.65Pb0.35MnO3 thin films depends on the composition at the surface. With a gentle annealing procedure, the surface provides a maximum of 80% spin asymmetry at 0.5 eV above the Fermi level in spite of extensive Pb segregation. A heavily annealed (restructured) surface exhibits a reduced surface {"}ordering{"} temperature of 240 K (compared to the approximately 335 K bulk value) as well as a reduced spin asymmetry value of 40% at 0.5 eV above Fermi energy.",

author = "Borca, {C. N.} and B. Xu and T. Komesu and Jeong, {H. K.} and Liu, {M. T.} and Liou, {S. H.} and S. Stabler and Y. Idzerda and Dowben, {P. A.}",

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doi = "10.1209/epl/i2001-00580-y",

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TY - JOUR

T1 - Electronic-structure modifications induced by surface segregation in La0.65Pb0.35MnO3 thin films

AU - Borca, C. N.

AU - Xu, B.

AU - Komesu, T.

AU - Jeong, H. K.

AU - Liu, M. T.

AU - Liou, S. H.

AU - Stabler, S.

AU - Idzerda, Y.

AU - Dowben, P. A.

PY - 2001/12/1

Y1 - 2001/12/1

N2 - Using spin-polarized inverse photoemission and X-ray absorption spectroscopy techniques, we show that the electronic structure of La0.65Pb0.35MnO3 thin films depends on the composition at the surface. With a gentle annealing procedure, the surface provides a maximum of 80% spin asymmetry at 0.5 eV above the Fermi level in spite of extensive Pb segregation. A heavily annealed (restructured) surface exhibits a reduced surface "ordering" temperature of 240 K (compared to the approximately 335 K bulk value) as well as a reduced spin asymmetry value of 40% at 0.5 eV above Fermi energy.

AB - Using spin-polarized inverse photoemission and X-ray absorption spectroscopy techniques, we show that the electronic structure of La0.65Pb0.35MnO3 thin films depends on the composition at the surface. With a gentle annealing procedure, the surface provides a maximum of 80% spin asymmetry at 0.5 eV above the Fermi level in spite of extensive Pb segregation. A heavily annealed (restructured) surface exhibits a reduced surface "ordering" temperature of 240 K (compared to the approximately 335 K bulk value) as well as a reduced spin asymmetry value of 40% at 0.5 eV above Fermi energy.

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DO - 10.1209/epl/i2001-00580-y

M3 - Article

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JO - EPL

JF - EPL

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Electronic-structure modifications induced by surface segregation in La_0.65Pb_0.35MnO₃ thin films

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