Abstract
A superconducting 100 μm planar coil has been tested for low field cw NMR. The nine-turn 5 nH coil is connected via a planar 1:8 step-up transformer to an external parallel capacitor and resonated at 0.8 MHz to give a Q of 350. The tank circuit voltage is measured with a liquid He temperature GaAs MESFET preamplifier. Test experiments have been conducted by immersing the Si chip with the planar pick-up coil in liquid and solid 3 He to measure their cw NMR absorptions in the temperature range 0.05 – 0.5 K.
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Koivuniemi, J., Kiviranta, M., Seppä, H. et al. 3He NMR with a 100 μm Planar Nb Coil. Journal of Low Temperature Physics 110, 255–260 (1998). https://doi.org/10.1023/A:1022516229023
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DOI: https://doi.org/10.1023/A:1022516229023