Infrared reflectivity of single-crystal Bi sub 2 M m +1 Co sub m O sub y ( M =Ca,Sr,Ba; m =1,2), Bi sub 2 Sr sub 3 Fe sub 2 O sub 9. 2 , and
Abstract
The infrared reflectivity of single crystals of Bi{sub 2}{ital M{ital m}+1}Co{sub {ital m}}O{sub {ital y}} ({ital M}=Ca, Sr, Ba; {ital m}=1,2), Bi{sub 2}Sr{sub 3}Fe{sub 2}O{sub 9.2}, and Bi{sub 2}Sr{sub 2}MnO{sub 6.25} was measured at room temperature between 0.08 and 1.4 eV. A broad absorption band is observed in the mid-ir range (near 0.5 eV) in all the compounds studied, and an absorption band near 0.3 eV is observed in the insulating system. In terms of a conventional Drude-Lorentz model, the measured reflectivity and the frequency-dependent conductivity between 0.2 and 1 eV can be fitted with three broad Lorentzians and a Drude term. For the Bi{sub 2}{ital M{ital m}+1}Co{sub {ital m}}O{sub {ital y}} system, the reflectivity increases and assumes a more metallic profile as the number of Co-O layers per unit cell increases, or as the ionic radius of {ital M} increases. The apparent plasma edge of this system is about 0.3 eV, and remains unshifted for all Bi{sub 2}{ital M3}Co{sub 2}O{sub {ital y}}, as observed in the high-{ital T}{sub {ital c}} cuprates in which the carrier density is changed by doping. In addition, as observed in the high-{ital T}{sub {ital c}} cuprates, the reflectivity-frequency profile below the apparent plasma edgemore »
- Authors:
-
- Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544 (USA)
- Department of Physics, Princeton University, Princeton, New Jersey 08544 (USA)
- Bell Communications Research, Red Bank, New Jersey 07701 (USA)
- Publication Date:
- OSTI Identifier:
- 5844968
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review, B: Condensed Matter; (USA)
- Additional Journal Information:
- Journal Volume: 43:4; Journal ID: ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; BARIUM OXIDES; REFLECTIVITY; BISMUTH OXIDES; CALCIUM OXIDES; HIGH-TC SUPERCONDUCTORS; IRON OXIDES; MANGANESE OXIDES; STRONTIUM OXIDES; INFRARED RADIATION; MEDIUM TEMPERATURE; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; ELECTROMAGNETIC RADIATION; IRON COMPOUNDS; MANGANESE COMPOUNDS; OPTICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RADIATIONS; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; SURFACE PROPERTIES; TRANSITION ELEMENT COMPOUNDS; 360204* - Ceramics, Cermets, & Refractories- Physical Properties
Citation Formats
Watanabe, Y, Tsui, D C, Birmingham, J T, Ong, N P, and Tarascon, J M. Infrared reflectivity of single-crystal Bi sub 2 M m +1 Co sub m O sub y ( M =Ca,Sr,Ba; m =1,2), Bi sub 2 Sr sub 3 Fe sub 2 O sub 9. 2 , and. United States: N. p., 1991.
Web. doi:10.1103/PhysRevB.43.3026.
Watanabe, Y, Tsui, D C, Birmingham, J T, Ong, N P, & Tarascon, J M. Infrared reflectivity of single-crystal Bi sub 2 M m +1 Co sub m O sub y ( M =Ca,Sr,Ba; m =1,2), Bi sub 2 Sr sub 3 Fe sub 2 O sub 9. 2 , and. United States. https://doi.org/10.1103/PhysRevB.43.3026
Watanabe, Y, Tsui, D C, Birmingham, J T, Ong, N P, and Tarascon, J M. 1991.
"Infrared reflectivity of single-crystal Bi sub 2 M m +1 Co sub m O sub y ( M =Ca,Sr,Ba; m =1,2), Bi sub 2 Sr sub 3 Fe sub 2 O sub 9. 2 , and". United States. https://doi.org/10.1103/PhysRevB.43.3026.
@article{osti_5844968,
title = {Infrared reflectivity of single-crystal Bi sub 2 M m +1 Co sub m O sub y ( M =Ca,Sr,Ba; m =1,2), Bi sub 2 Sr sub 3 Fe sub 2 O sub 9. 2 , and},
author = {Watanabe, Y and Tsui, D C and Birmingham, J T and Ong, N P and Tarascon, J M},
abstractNote = {The infrared reflectivity of single crystals of Bi{sub 2}{ital M{ital m}+1}Co{sub {ital m}}O{sub {ital y}} ({ital M}=Ca, Sr, Ba; {ital m}=1,2), Bi{sub 2}Sr{sub 3}Fe{sub 2}O{sub 9.2}, and Bi{sub 2}Sr{sub 2}MnO{sub 6.25} was measured at room temperature between 0.08 and 1.4 eV. A broad absorption band is observed in the mid-ir range (near 0.5 eV) in all the compounds studied, and an absorption band near 0.3 eV is observed in the insulating system. In terms of a conventional Drude-Lorentz model, the measured reflectivity and the frequency-dependent conductivity between 0.2 and 1 eV can be fitted with three broad Lorentzians and a Drude term. For the Bi{sub 2}{ital M{ital m}+1}Co{sub {ital m}}O{sub {ital y}} system, the reflectivity increases and assumes a more metallic profile as the number of Co-O layers per unit cell increases, or as the ionic radius of {ital M} increases. The apparent plasma edge of this system is about 0.3 eV, and remains unshifted for all Bi{sub 2}{ital M3}Co{sub 2}O{sub {ital y}}, as observed in the high-{ital T}{sub {ital c}} cuprates in which the carrier density is changed by doping. In addition, as observed in the high-{ital T}{sub {ital c}} cuprates, the reflectivity-frequency profile below the apparent plasma edge is less curved than predicted by the Drude model. For the Bi{sub 2}{ital M{ital m}+1}Co{sub {ital m}}O{sub {ital y}} system, the intensity of the mid-ir absorption approximately scales with that of the free-carrierlike absorption.},
doi = {10.1103/PhysRevB.43.3026},
url = {https://www.osti.gov/biblio/5844968},
journal = {Physical Review, B: Condensed Matter; (USA)},
issn = {0163-1829},
number = ,
volume = 43:4,
place = {United States},
year = {Fri Feb 01 00:00:00 EST 1991},
month = {Fri Feb 01 00:00:00 EST 1991}
}