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The anisotropy of the critical current density was estimated for stoichiometric Bi2Sr2CaCu2Oy (Bi-2212) and Bi2.1Sr1.8Ca1.0Cu2.0Oy single crystals. For this purpose, the critical current density in the a–b plane Jcab and that along the c-axis Jcc were discriminated from measurement of DC magnetic moments for specimens with different aspect ratio. The magnetic moment of specimen was measured by a SQUID...
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