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Examines YBa[sub 2]Cu[sub 3]O[sub 7-x] thin film magnetometer. Use of photolithographic processing to pattern layers; Operation of the magnetometer; Determination of the flux transformer critical current; Measurement of the device magnetic field sensitivity.

Fabricates the direct current superconducting quantum interference device (SQUID) magnetometers from YBa[sub 2]Cu[sub 3]O[sub 7-x] thin films. Use of flux modulation to measure the magnetometer noise; Relationship between magnetic field sensitivity and hole size; Effect of reducing SQUID inductance on magnetic field resolution.

Examines the production of magnetic images of eddy currents in patterned copper thin films using a scanning magnetic flux microscope. Use of weak applied fields in small structure imaging; Application of the superconducting quantum interference device in the image production; Induction of eddy currents in the samples.