Mz. Tseng et al., MEASUREMENTS AND ANALYSIS OF HALL-EFFECT OF A 2-DIMENSIONAL ELECTRON-GAS IN THE CLOSE PROXIMITY OF A SUPERCONDUCTING YBA2CU3O7-X FILM, Journal of applied physics, 76(6), 1994, pp. 3562-3565
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.