attoSHPM+
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Specifications attoSHPM+
low temperature scanning Hall probe microscope
General Specifications
type of instrument
Scanning Hall Probe Microscope with STM tip for tip-sample distance control
sensor head specifics
MBE grown hall cross sensor (GaAs/AlGaAs heterostructure) on a 2-axis tiltable sensor
mount
Operation Modes
imaging modes
constant height
slope compensation
2 axis scan plane correction
z feedback
STM distance tracking (usually only for autoapproach)
Resolution*
size of Hall cross on sensor
400 nm (high resolution); 250 mm (ultra high resolution)
field sensitivity @ 4 K
1500 V/AT
noise-equivalent magnetic field (theoretical)
15 nT/√Hz @ 4 K and 40 μA Hall current
80 nT/√Hz @ 77 K and 40 μA Hall current
typical attainable field detection limit (measured)
15 μT typ. (bandwith 10 Hz @ frequency 277 Hz)
z bit resolution @ 4 K
57 pm at 15 μm scan range
Sample Positioning
total travel range
5 x 5 x 5 mm³ (open loop)
step size
0.05..3 μm @ 300 K, 10..500 nm @ 4 K
fine scan range
80 x 80 x 24 μm³ @ 300 K
125 x 125 x 15 μm³ @ 4 K
closed loop scanning
yes
close B