Abstract
Temperature dependence of magnetic relaxation and M-H hysteresis has been measured applying magnetic field parallel to the c-axis of the crystal for Bi2.2Sr1.8Ca1.0Cu2.0Ox single crystal which was grown by the TSFZ method. As for the magnetization decay measurement, distribution of pinning potential was calculated according to the Griessen's formalism, Obtained result shows very narrow distribution centered around 40meV, and does not have intensity at high energy. In case of hysteresis measurement, irreversibility field was obtained as a function of temperature. Irreversibility field increased exponentially at near around 25K with decreasing temperature. These peculiar phenomena may be attributed to the highly two-dimensional character of Bi-based materials.
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