2010
DOI: 10.12693/aphyspola.118.393
|View full text |Cite
|
Sign up to set email alerts
|

Bismuth Valence in a Tl0.7Bi0.3Sr1.6Ba0.4CaCu2OySuperconductor from X-Ray Photoemission Spectroscopy

Abstract: The X-ray electron photoemission spectra of a Tl 0. 3+ . The ratio of trivalent Bi 3+ to pentavalent Bi 5+ bismuth ions was calculated from decomposition of the spin-orbit split spectrum of the Bi 4f photoelectrons. The conclusion is that Bi is present in trivalent and in pentavalent form and the ratio of Bi 3+ to Bi 5+ is 1.87 ± 0.02.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

0
5
0

Year Published

2014
2014
2024
2024

Publication Types

Select...
9

Relationship

0
9

Authors

Journals

citations
Cited by 23 publications
(7 citation statements)
references
References 5 publications
0
5
0
Order By: Relevance
“…As shown in Figure b, the Cu peaks of the pristine and Ag-doped CuBi 2 O 4 appear at the exactly same locations, 934.1 eV (Cu 2p 3/2 ) and 954.0 eV (Cu 2p 1/2 ), indicating that Ag doping does not affect the oxidation state of Cu 2+ in the CuBi 2 O 4 structure. , However, the Bi 4f peaks in the Ag-doped sample were shifted slightly to higher binding energy by ca. 0.1 eV, suggesting that substitutional doping of Ag + into the Bi 3+ sites resulted in an increase in oxidation state of Bi to compensate the charge imbalance (Figure c). , …”
Section: Resultsmentioning
confidence: 97%
“…As shown in Figure b, the Cu peaks of the pristine and Ag-doped CuBi 2 O 4 appear at the exactly same locations, 934.1 eV (Cu 2p 3/2 ) and 954.0 eV (Cu 2p 1/2 ), indicating that Ag doping does not affect the oxidation state of Cu 2+ in the CuBi 2 O 4 structure. , However, the Bi 4f peaks in the Ag-doped sample were shifted slightly to higher binding energy by ca. 0.1 eV, suggesting that substitutional doping of Ag + into the Bi 3+ sites resulted in an increase in oxidation state of Bi to compensate the charge imbalance (Figure c). , …”
Section: Resultsmentioning
confidence: 97%
“…The binding energy difference between the two pairs of spin-orbit peaks is about 5.4 (5.3) eV. A large separation of 2.1 eV between the two contributions of each spin-orbit photoemission signal was observed, suggesting that Bi is in a mixed valence state with Bi 3+ and Bi 5+ ion valency [36].We performed double-peak fitting for 4f 7/2 and 4f 5/2 spectra, using a χ 2 iterative program, and the concentration of Bi 3+ and Bi 5+ valence states is obtained about 55% and 45%, respectively. The Ba 3d symmetric spectra are shown in and Bi 4d core-level spectrum.…”
Section: E X-ray Photon Spectroscopymentioning
confidence: 92%
“…Furthermore, in the measured sample, additional Bi 4f components (at 161.0 eV – 4f 7/2 and 166.2 eV – 4f 5/2 ) are observed. Such high binding energy values suggest the existence of Bi in pentavalent form within the surface region, which shows lower kinetic energy of emitted photoelectrons compared to Bi 3+ due to larger Coulomb attraction. , …”
Section: Resultsmentioning
confidence: 99%
“…Such high binding energy values suggest the existence of Bi in pentavalent form within the surface region, which shows lower kinetic energy of emitted photoelectrons compared to Bi 3+ due to larger Coulomb attraction. 70,71 FT-IR analysis was performed to identify the functional groups of the CM/Bi 4 O 5 Br 2 /BiOBr composites (Figure 5). A broad band in the range of 3666−3000 cm −1 corresponds to the stretching vibrations of hydroxyl groups (O−H), whereas the band at 2896 cm −1 is associated with C−H stretching.…”
Section: ■ Introductionmentioning
confidence: 99%