Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session H06: Instrumentation and Measurements I
2:30 PM–5:06 PM,
Tuesday, March 6, 2018
LACC Room: 153A
Sponsoring Unit: GIMS
Abstract: H06.00008 : Measuring Hall Conductivity Using a Cantilever Torque Magnetometer*
3:54 PM–4:06 PM
We present measurements of Hall conductivity of a Corbino-disc patterned thin film sample fabricated on a cantilever-based torque magnetometer. Applying a voltage difference across the disc creates a magnetic dipole moment propotional to σxy. This dipole moment interacts with an applied magnetic field, exerting a torque on the cantilever. Such a technique uses symmetry to eliminate the longitudinal resistance dependence which spoils measurements of σxy in insulators at low temperaure. We have fabricated high-Q cantilevers with Corbino-disks and tested the minimum detectible σxy both at room temperature and when cooling. Our preliminary results indicate that this technique could be used to accurately probe σxy in previously inaccessible materials.
*Our work is supported by the Moore Foundation and the US Army
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700