DOI: 10.1063/1.1348327. Optical properties and structure of tellurium–germanium– bismuth–antimony compounds with fast phase-change capability

Optical properties and structure of tellurium–germanium– bismuth–antimony compounds with fast phase-change capability

10.1063/1.1348327

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

Quaternary TeGeBiSb amorphous films, 100 nm in thickness, were prepared by rf sputtering onto either a Si (100) or polycarbonate substrate. Crystalline films were obtained by subsequent annealing at 300 °C for 10 min. At least two phases with hexagonal and rhombohedral structures were identified by x-ray diffractometry in the quaternary system. Their compositions are close to formulas Te5Ge4Bi4Sb and Te5Ge4Bi7Sb, with c/a ratios of 5.5 and 9.4, respectively. The Te5Ge4Bi4Sb film shows a reasonable reflectivity contrast ranging from 20% to 25% in the whole visible spectrum, while the reflectivity contrast of Te5Ge4Bi7Sb film shows a sharp lowering tendency with decreasing wavelength and turns negative at wavelengths smaller than 470 nm. Results of thermal analyses show that the films crystallize at around 236–266 °C with corresponding activation energies 2.67–2.88 eV. The change in reflectivity contrast is explained based on the variation in optical band gaps of the TeGeBiSb materials with either Bi content or annealing temperature. These materials may find applicability in reversible type phase-change optical recording.

Bibliography

Lee, C. M., Chin, T. S., & Huang, E. Y. (2001). Optical properties and structure of telluriumâgermaniumâ bismuthâantimony compounds with fast phase-change capability. Journal of Applied Physics, 89(6), 3290â3294.

Authors 3

C. M. Lee (first)
T. S. Chin (additional)
E. Y. Huang (additional)

References 15 Referenced 17

{'key': '2024020600145806700_r1', 'first-page': '187', 'volume': '1', 'year': '1965', 'journal-title': 'Inorg. Mater.'} / Inorg. Mater. (1965)
{'key': '2024020600145806700_r2', 'first-page': '557', 'volume': '11', 'year': '1992', 'journal-title': 'Appl. Phys. Commun.'} / Appl. Phys. Commun. (1992)
10.1016/0038-1098(95)00335-5 / Solid State Commun. (1995)
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{'key': '2024020600145806700_r7', 'first-page': '55', 'volume': '44', 'year': '1997', 'journal-title': 'J. Mod. Opt.'} / J. Mod. Opt. (1997)
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{'key': '2024020600145806700_r12'}
10.1016/S0040-6090(96)09091-8 / Thin Solid Films (1997)
10.1016/0022-3093(83)90339-3 / J. Non-Cryst. Solids (1983)
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Dates

Type	When
Created	23 years ago (July 26, 2002, 10:14 a.m.)
Deposited	1 year, 6 months ago (Feb. 5, 2024, 7:40 p.m.)
Indexed	1 year, 1 month ago (June 27, 2024, 7:30 p.m.)
Issued	24 years, 5 months ago (March 15, 2001)
Published	24 years, 5 months ago (March 15, 2001)
Published Print	24 years, 5 months ago (March 15, 2001)

Funders 0

None

BibTeX

@article{Lee_2001, title={Optical properties and structure of tellurium–germanium– bismuth–antimony compounds with fast phase-change capability}, volume={89}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1348327}, DOI={10.1063/1.1348327}, number={6}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Lee, C. M. and Chin, T. S. and Huang, E. Y.}, year={2001}, month=mar, pages={3290–3294} }

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