50 T pulsed magnetic fields in microcoils

In this article we present a system based on microcoils capable of generati ng pulsed magnetic fields up to 50 T. We discuss the current generation and the measurement techniques currently used. We have measured the Faraday ro tation for different paramagnetic materials, glass, gadolinium gallium garn et, Pr gallium garnet, and Si and have used the results to calibrate the ma gnetic field achieved. We discuss the relative merits of such a system comp ared to conventional ones, as well as the field characteristics obtained. ( C) 2000 American Institute of Physics. [S0021-8979(00)09603-1].