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Inhomogeneities of a series of bulk melt-grown YBCO superconductors are investigated using the method of the pulsed field magnetization (PFM). Cracking or damages are not found through mapping the trapped field at the maximum pulsed field of 5.1T in liquid nitrogen (77K). The amplitude of PFM fields should exceed 1.9T to guarantee sensibility to inhomogeneity of YBCO bulks. Optimum sensitive pulsed...
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