Superconducting aluminum heat switch with 3 nO equivalent resistance
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10447018" target="_blank" >RIV/00216208:11320/22:10447018 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=IrpsUkwHMi" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=IrpsUkwHMi</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0079639" target="_blank" >10.1063/5.0079639</a>
Alternative languages
Result language
angličtina
Original language name
Superconducting aluminum heat switch with 3 nO equivalent resistance
Original language description
Superconducting heat switches with extremely low normal state resistances are needed for constructing continuous nuclear demagnetization refrigerators with high cooling power. Aluminum is a suitable superconductor for the heat switch because of its high Debye temperature and its commercial availability in high purity. We have constructed a high quality Al heat switch whose design is significantly different than that of previous heat switches. In order to join the Al to Cu with low contact resistance, we plasma etched the Al to remove its oxide layer and then immediately deposited Au without breaking the vacuum of the e-beam evaporator. In the normal state of the heat switch, we measured a thermal conductance of 8T W/K-2, which is equivalent to an electrical resistance of 3 n omega according to the Wiedemann-Franz law. In the superconducting state, we measured a thermal conductance that is 2 x 10(6) times lower than that of the normal state at 50 mK.& nbsp;Published under an exclusive license by AIP Publishing.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20100 - Civil engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Review of Scientific Instruments
ISSN
0034-6748
e-ISSN
1089-7623
Volume of the periodical
93
Issue of the periodical within the volume
3
Country of publishing house
US - UNITED STATES
Number of pages
4
Pages from-to
034901
UT code for WoS article
000784333800002
EID of the result in the Scopus database
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