  We present the first measurements of Hall conductivity utilizing a new torque
magnetometry method designed for insulators. A Corbino disk exhibits a magnetic
dipole moment proportional to Hall conductivity when voltage is applied across
a test material. This magnetic dipole moment can be measured through torque
magnetometry. The symmetry of this contactless technique allows for the
measurement of Hall conductivity in previously inaccessible materials. Finally,
a low-temperature noise bound, the lack of systematic errors on dummy devices,
and a measurement of the Hall conductivity of sputtered indium tin oxide
demonstrate the efficacy of the technique.
