SPM Measurements
Application Examples
SPM Measurements
Application Examples
SPM using attocube Nanopositioners in Magnetic Fields above 30 T
In an outstanding setup, Benjamin Bryant and Lisa Rossi together with the SPM group of Alex Khajetoorians( Radboud University, Netherlands), designed a high field scanning probe microscope for operation at cryogenic temperatures and in extreme magnetic fields up to 38 T. An ANPz30 nanopositioner controls the coarse approach of an atomic force microscope cantilever to a scanned sample. Due to the compactness and rigid design of the positioner, the sensitivity to vibrational noise is reduced, which is critical for SPM in the extreme environment of the Bitter magnet.
L. Rossi et al., Rev. Sci. Instrum. 89, 113706( 2018)
Scanning Hall Probe Microscopy at 300 mK with ANP Positioners
Magnetic properties of superconducting and ferro magnetic materials at ultra-low temperatures represent some of the most interesting contemporary problems in condensed matter physics. These properties are typically investiga ted using a magnetic force microscope or a scanning Hall probe microscope( SHPM). Such a SHPM was built by the group of Simon Bending( University of Bath, UK) with submicron lateral resolution and a large scanning range.
V. V. Khotkevych et al., Rev. Sci. Instrum. 79, 123708( 2008)
Magnetic Resonance Imaging of Nanoscale Virus at 300 mK
Christian Degen( now at ETH Zurich, Switzerland), Martino Poggio( now at University of Basel, Switzerland) and the group of Daniel Rugar at IBM Almaden( USA) demonstrated improvement of magneticresonance-force-microscopy imaging resolution to length scales of a few nanometers, representing a 100-million fold increase in volume resolution over conventional MRI. In the setup used for these ground-breaking experiments, two attocube ANPx51 positioners played the crucial role of coarse positioning the sample over the nanoscale magnetic tip.
C. L. Degen et al., PNAS 106, 1313( 2009)