Effect of ionizing radiation on noise in MgB2 thin film – a candidate material for detector development for post-Cassini planetary missions
| Autor: | B. Lakew, Shahid Aslam, David Franz, John C. Brasunas, H. Jones, B. Moeckly |
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| Rok vydání: | 2006 |
| Předmět: |
Superconductivity
Materials science Condensed matter physics Noise spectral density Bolometer Energy Engineering and Power Technology Substrate (electronics) Condensed Matter Physics Electronic Optical and Magnetic Materials law.invention Background noise chemistry.chemical_compound chemistry law Magnesium diboride Electrical and Electronic Engineering Thin film Noise (radio) |
| Zdroj: | Physica C: Superconductivity. 440:1-5 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2006.03.043 |
| Popis: | A thin film of MgB 2 , grown on a SiN–Si substrate, with a superconducting transition temperature, T c , near 39 K has been irradiated with γ-rays from a 60 Co source. The total dose was 100 Krads (Si). Its pre- and post-irradiation noise has been measured and noise spectral density plots made. No change in d R /d T , pre- and post-irradiation was measured. At the mid-point of the transition, T = 38.24 K, a noise spectral density S V = 0.34 nV Hz −1/2 was measured at 10 Hz. The temperature noise, K n , of the MgB 2 film at different frequencies is compared to that of high temperature superconducting (HTS) thin films (YBaCuO and GdBaCuO with T c ∼ 90 K) used currently in HTS transition-edge bolometers. Even with the observed post-irradiation small increase in noise, its lower T c and K n values predict that high performance far IR bolometers can be developed using MgB 2 as a thermistor. |
| Databáze: | OpenAIRE |
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