Nuclear magnetic resonance thermometry at ultra-low temperature
- 1 December 1976
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. IM-25 (4) , 352-356
- https://doi.org/10.1109/TIM.1976.6312241
Abstract
The electromagnetic signal of NMR in pure metallic samples emerges as the most reliable technique for measuring low temperatures from 1 K to below 1 mK (10−3 K). This fact stems from the self-consistency of the temperature measurement by NMR, which relies on the Curie law and the Korringa law separately. Samples of Pt, Al, and Cu have been studied with a careful evaluation of the effect of magnetic impurities. Finally the temperatures of the remarkable features of the 3He melting curve which may be regarded as thermometric fixed points have been measured.Keywords
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