Surface atomic and chemical structure of relaxor Sr0.63Ba0.37Nb2O6(001)

J. L. Wang; B. Vilquin; B. Gautier; G. Dezanneau; N. Barrett

doi:10.1063/1.4922773

Surface atomic and chemical structure of relaxor Sr_0.63Ba_0.37Nb₂O₆(001)

J. L. Wang
, B. Vilquin
, B. Gautier
, G. Dezanneau
, N. Barrett

École Polytechnique

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

Abstract

The surface atomic and chemical structures of a Sr_0.63Ba_0.37Nb₂O₆(001) single crystal are studied using the low-energy electron diffraction (LEED) and X-ray photoelectron spectroscopy. Sharp, well-defined LEED patterns are observed, consisting of the superposition of two surface reconstructions, (5 × 5)R26.6° and (5 2 × 2)R45°, probably due to long-range ordering of the alkaline earth metal vacancies in A1 or A2 sites. The Sr/Ba stoichiometry is determined by high-resolution X-ray photoelectron spectroscopy. The Sr 3d core level has 2 components corresponding to the 12- and 15-fold coordinated A1 and A2 sites. The Ba 3d core level has only one component, consistent with the A2 site occupancy. The long-range order of the cation vacancies implies that it is rather the Sr/Ba occupancy of the A2 sites which is responsible for the local random fields at the origin of the relaxor behavior.

Original language	English
Article number	242901
Journal	Applied Physics Letters
Volume	106
Issue number	24
DOIs	https://doi.org/10.1063/1.4922773
Publication status	Published - 15 Jun 2015

Access to Document

10.1063/1.4922773

Cite this

@article{f94b18cba6504378a44649baa9a1d46d,

title = "Surface atomic and chemical structure of relaxor Sr0.63Ba0.37Nb2O6(001)",

abstract = "The surface atomic and chemical structures of a Sr0.63Ba0.37Nb2O6(001) single crystal are studied using the low-energy electron diffraction (LEED) and X-ray photoelectron spectroscopy. Sharp, well-defined LEED patterns are observed, consisting of the superposition of two surface reconstructions, (5 × 5)R26.6° and (5 2 × 2)R45°, probably due to long-range ordering of the alkaline earth metal vacancies in A1 or A2 sites. The Sr/Ba stoichiometry is determined by high-resolution X-ray photoelectron spectroscopy. The Sr 3d core level has 2 components corresponding to the 12- and 15-fold coordinated A1 and A2 sites. The Ba 3d core level has only one component, consistent with the A2 site occupancy. The long-range order of the cation vacancies implies that it is rather the Sr/Ba occupancy of the A2 sites which is responsible for the local random fields at the origin of the relaxor behavior.",

author = "Wang, \{J. L.\} and B. Vilquin and B. Gautier and G. Dezanneau and N. Barrett",

note = "Publisher Copyright: {\textcopyright} 2015 AIP Publishing LLC.",

year = "2015",

month = jun,

day = "15",

doi = "10.1063/1.4922773",

language = "English",

volume = "106",

journal = "Applied Physics Letters",

issn = "0003-6951",

number = "24",

}

TY - JOUR

T1 - Surface atomic and chemical structure of relaxor Sr0.63Ba0.37Nb2O6(001)

AU - Wang, J. L.

AU - Vilquin, B.

AU - Gautier, B.

AU - Dezanneau, G.

AU - Barrett, N.

PY - 2015/6/15

Y1 - 2015/6/15

N2 - The surface atomic and chemical structures of a Sr0.63Ba0.37Nb2O6(001) single crystal are studied using the low-energy electron diffraction (LEED) and X-ray photoelectron spectroscopy. Sharp, well-defined LEED patterns are observed, consisting of the superposition of two surface reconstructions, (5 × 5)R26.6° and (5 2 × 2)R45°, probably due to long-range ordering of the alkaline earth metal vacancies in A1 or A2 sites. The Sr/Ba stoichiometry is determined by high-resolution X-ray photoelectron spectroscopy. The Sr 3d core level has 2 components corresponding to the 12- and 15-fold coordinated A1 and A2 sites. The Ba 3d core level has only one component, consistent with the A2 site occupancy. The long-range order of the cation vacancies implies that it is rather the Sr/Ba occupancy of the A2 sites which is responsible for the local random fields at the origin of the relaxor behavior.

AB - The surface atomic and chemical structures of a Sr0.63Ba0.37Nb2O6(001) single crystal are studied using the low-energy electron diffraction (LEED) and X-ray photoelectron spectroscopy. Sharp, well-defined LEED patterns are observed, consisting of the superposition of two surface reconstructions, (5 × 5)R26.6° and (5 2 × 2)R45°, probably due to long-range ordering of the alkaline earth metal vacancies in A1 or A2 sites. The Sr/Ba stoichiometry is determined by high-resolution X-ray photoelectron spectroscopy. The Sr 3d core level has 2 components corresponding to the 12- and 15-fold coordinated A1 and A2 sites. The Ba 3d core level has only one component, consistent with the A2 site occupancy. The long-range order of the cation vacancies implies that it is rather the Sr/Ba occupancy of the A2 sites which is responsible for the local random fields at the origin of the relaxor behavior.

U2 - 10.1063/1.4922773

DO - 10.1063/1.4922773

M3 - Article

AN - SCOPUS:84934904933

SN - 0003-6951

VL - 106

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 24

M1 - 242901

ER -

Surface atomic and chemical structure of relaxor Sr0.63Ba0.37Nb2O6(001)

Abstract

Access to Document

Fingerprint

Cite this

Surface atomic and chemical structure of relaxor Sr_0.63Ba_0.37Nb₂O₆(001)