MEASUREMENTS AND ANALYSIS OF HALL-EFFECT OF A 2-DIMENSIONAL ELECTRON-GAS IN THE CLOSE PROXIMITY OF A SUPERCONDUCTING YBA2CU3O7-X FILM

A direct integration of YBa2Cu3O7-x and a two dimensional electron gas Hall probe was made possible through the use of a MgO buffer layer. W e demonstrate the use of this structure for the measurements of the ma gnetization hysteresis of a superconducting YBa2Cu3O7-x thin film, and we make an estimate of the sensitivity and resolution that can be ach ieved with this probe structure. The close proximity of the YBa2Cu3O7- x to the two dimensional electron gas (similar to 1700 Angstrom) allow s sensitive measurements of interactiong between the two; more importa ntly, closer superconductor-semiconductor spacing can be achieved with out severe compromise of the component material quality.