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Specifications
attoSHPM
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 50 x 50 x 24 µm³ @ 300 K
30 x 30 x 15 µm³ @ 4 K
closed loop scanning optional
sample holder ASH/QE/4CX quick-exchange sample holder with 8 electrical contacts, integrated heater
calibrated temperature sensor
Suitable Operating Conditions
temperature range 1.5 K..300 K (dependent on cryostat); mK compatible setup available on request
magnetic field range 0..15 T+ (dependent on magnet)
operating pressure designed for He exchange gas (vacuum compatible version down to 1E-6 mbar on request)
Suitable Cooling Systems
titanium housing diameter 48 mm