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Inductive-detection electron-spin resonance spectroscopy with 65 spins/ Hz sensitivity
- Probst, S;
- Bienfait, A;
- Campagne-Ibarcq, P;
- Pla, JJ;
- Albanese, B;
- Da Silva Barbosa, JF;
- Schenkel, T;
- Vion, D;
- Esteve, D;
- Mølmer, K;
- Morton, JJL;
- Heeres, R;
- Bertet, P
Abstract
We report electron spin resonance spectroscopy measurements performed at millikelvin temperatures in a custom-built spectrometer comprising a superconducting micro-resonator at 7 GHz and a Josephson parametric amplifier. Owing to the small (∼10-12λ3) magnetic resonator mode volume and to the low noise of the parametric amplifier, the spectrometer's single shot sensitivity reaches 260 ± 40 spins/echo translating into 65±10 spins/√Hz for repeated acquisition.
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