Ongoing Verification Experiment


Location of Experiment:  Institute for Microelectronics Technology, Russian Academy of Sciences,  Chernogolovka, Russia

Collaborators:   A.V. Nikulov, S.V. Dubonos

Investigation:  Magnetization measurements on adiabatically isolated indium spheres of d = 4,400 angstroms using the Ballistic Hall Micromagnetometer.


Ballistic Hall Micromagnetometer

A magnetization measurement device which allows quantitative studies of thermodynamic properties of individual submicron superconducting particles fabricated on a GaAs/GaAlAs heterostructure with a high-mobility two-dimensional electron gas (2DEG) embedded 60 nm below the surface.  A confined ballistic electron flow passes in a close vicinity of a small magnetized object and the deviations of the beam due to a stray magnetic field are detected.  The magnetization signal depends on the filling factor at the junctions.

A.K. Geim, S.V. Dubonos, J.G.S. Lok, I.V. Grigorieva, J.C. Maan, L. Theil Hansen and P.E. Lindelof, Appl. Phys. Lett. 71, 2379 (1997).