On the estimating the superconducting volume fraction from the internal magnetic susceptibility
The study challenges a common method for estimating superconducting volume fraction, which assumes that this fraction equals the amplitude of internal magnetic susceptibility. Using a compressed Pr4Ni3O10 crystal, the authors show that this assumption is flawed. They find a significant discrepancy between two calculation methods (0.82 versus 0.098), suggesting that spatial variations in non-superconducting material invalidate the simple postulate.