Details
| Original language | English |
|---|---|
| Pages (from-to) | 443-446 |
| Number of pages | 4 |
| Journal | Zeitschrift für Naturforschung - Section A Physical Sciences |
| Volume | 48 |
| Issue number | 1-2 |
| Publication status | Published - 1 Feb 1993 |
Abstract
We have studied the anisotropic optical properties of binary Nb02 5δ (0 < delta ≤ 0.083) and ternary Nb18ε18ε69 (ε = 0, 1, …, 9) compounds using the polarized regular-reflection method. We observed strong anisotropic behaviour for all reduced phases. The anisotropic effect can be related to the crystallographical structure principle and to the doping of charge carriers by the reduction of oxygen (δ) or substitution of W for Nb (ε) in the binary and ternary oxides, respectively. Our results indicate that the charge carriers are confined to the structural block units. For increasing δ and ε, metal-like properties occur (δ ≥ 0.1, ε > 8) in the infinite block direction only.
Keywords
- Block-type crystal structure, Niobium oxide, Niobium tungsten oxide, Optical reflectivity
ASJC Scopus subject areas
- Mathematics(all)
- Mathematical Physics
- Physics and Astronomy(all)
- General Physics and Astronomy
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Zeitschrift für Naturforschung - Section A Physical Sciences, Vol. 48, No. 1-2, 01.02.1993, p. 443-446.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Investigations of the Anisotropic Optical Reflectivity of Binary and Ternary Nb-W Oxides Possessing Block-Type Crystal Structure
AU - Rüscher, C. H.
AU - Zimmermann, M.
AU - Götte, M.
N1 - Funding Information: We are grateful to Professor R. Gruehn and Professor A. Hussain for providing us with the samples and to Dr. H. Rahman for doing some HRTEM-photographs. Work supported by BMFT F + E 13N57387.
PY - 1993/2/1
Y1 - 1993/2/1
N2 - We have studied the anisotropic optical properties of binary Nb02 5δ (0 < delta ≤ 0.083) and ternary Nb18ε18ε69 (ε = 0, 1, …, 9) compounds using the polarized regular-reflection method. We observed strong anisotropic behaviour for all reduced phases. The anisotropic effect can be related to the crystallographical structure principle and to the doping of charge carriers by the reduction of oxygen (δ) or substitution of W for Nb (ε) in the binary and ternary oxides, respectively. Our results indicate that the charge carriers are confined to the structural block units. For increasing δ and ε, metal-like properties occur (δ ≥ 0.1, ε > 8) in the infinite block direction only.
AB - We have studied the anisotropic optical properties of binary Nb02 5δ (0 < delta ≤ 0.083) and ternary Nb18ε18ε69 (ε = 0, 1, …, 9) compounds using the polarized regular-reflection method. We observed strong anisotropic behaviour for all reduced phases. The anisotropic effect can be related to the crystallographical structure principle and to the doping of charge carriers by the reduction of oxygen (δ) or substitution of W for Nb (ε) in the binary and ternary oxides, respectively. Our results indicate that the charge carriers are confined to the structural block units. For increasing δ and ε, metal-like properties occur (δ ≥ 0.1, ε > 8) in the infinite block direction only.
KW - Block-type crystal structure
KW - Niobium oxide
KW - Niobium tungsten oxide
KW - Optical reflectivity
UR - http://www.scopus.com/inward/record.url?scp=84866573980&partnerID=8YFLogxK
U2 - 10.1515/zna-1993-1-274
DO - 10.1515/zna-1993-1-274
M3 - Article
AN - SCOPUS:84866573980
VL - 48
SP - 443
EP - 446
JO - Zeitschrift für Naturforschung - Section A Physical Sciences
JF - Zeitschrift für Naturforschung - Section A Physical Sciences
SN - 0932-0784
IS - 1-2
ER -