Abstract
The current–voltage characteristics in different magnetic fields are measured on a whisker ( 2 mm×0.037 mm×0.007 mm ) of highly anisotropic material Bi2212 with field H|| c-axis and H|| b-axis, respectively. When H|| c-axis, the j c versus T relation remains normal for all fields. However, when the field H is along the b-axis, we obtained an abnormal j c versus T relation with a peak value appearing at T=25 K in H=4 T . The possible explanations are discussed.
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