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Fast bolometric res...
Fast bolometric response of bulk La0.7Sr0.3MnO3 electroceramic structures
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Nikolaenko, Y. M. (author)
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Maksimov, I. S. (author)
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Medvedev, Y. V. (author)
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Ulyanov, A. N. (author)
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- Grishin, Alexander M. (author)
- KTH,Mikroelektronik och informationsteknik, IMIT
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(creator_code:org_t)
- 2000
- 2000
- English.
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In: Acta Physica Polonica. A. - 0587-4246 .- 1898-794X. ; 97:6, s. 991-995
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- We report on the performance of a microwave electroceramic bolometer of hybrid La0.7Sr0.3MnO3/Al2O3 (0.2 x 2 x 4 mm(3)) structure. The estimated thermal resistance of the bulk ceramic manganite film-single crystal sapphire interface is about 500 K/W at room temperature. This resistance is the main thermal barrier in the heat sink system and has been found to be slightly dependent on temperature, When compared with the high-ire superconducting bolometers, the La0.7Sr0.3MnO3 microwave electroceramic bolometer works in a more wide temperature range, from 77 K to 330 K, excluding the narrow temperature interval at the metal-insulator phase transition (T = 230 K). The microwave electroceramic bolometer sensitivity and the time constant at room temperature have been found to be 0.1 V/W and 100 ms, respectively. To improve the bolometer performance the point contact has been fabricated by a break junction technique. The optimization of a microwave electroceramic bolometer design brought to a considerable improvement of basic bolometer characteristics. The microwave sensitivity was about 0.3 V/W and the time constant was less than 100 ns.
Keyword
- thin-films
- colossal magnetoresistance
- optical-response
Publication and Content Type
- ref (subject category)
- art (subject category)
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