A.A. Sinchenko, I.A. Rudnev, A.E. Khodot
Moscow State Engineering Physics Institute (Technical University),
Moscow, Russia

I.I. Akimov
A.A. Bochvar's Institute of Inorganic Materials, Moscow, Russia

   Magnetic propeties of Bi-Si-Ca-Cu-O-based tapes prepared by the various techhnological cycles have been investigated by use micro-Hall probe. It is found that the critical current is strongly non-uniform along the length of the investigated tapess. The rigeons with a high current-carring capability are formed by strong grain boundaries, which are located near to bound Ag-BSCCO. The samples subjiected to additional meited by hign pressure between intermediate heat treatments have got a higher value of the critical current and a smailer degree of non-uniform in comparison with the intermediate rolling samples. Results of the magnetic measurements correiate compietely with the resistive data of the critical current measurements. Local measurements of hysteretic losses have shown that the values of the losses in various points of investigated tapes are different more than 30%.

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