Back Cover A spiral microresonator made of yttrium barium copper oxide high-temperature superconductor and placed inside a standard electron paramagnetic resonance (EPR) tube boosts the sensitivity of conventional pulsed EPR by three orders of magnitude for nanoliter samples. More in article number e01451, Šimėnas, Morton, and co-workers.
Usevičius et al. (2026) studied this question.