How can NMR measurements provide information about superconductors?

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magnetic resonance Figure 1: Precession of a magnetic dipole moment μ in the presence of a constant field H and a rotating field H′ (see text)

In the study of superconductors, nuclear magnetic resonance (NMR) serves as a valuable diagnostic tool. Specifically, the shape of the NMR spectral peaks provides detailed information regarding the penetration and internal distribution of the magnetic field within the superconducting material.1