liquid helium based superconducting magnet systems
he bath cryostat
temperature range: 4 . . 70 K
attoDAMP anti-noise & -vibrations cabinet
enables sensitive measurements like LT-SPM
optical free-beam access through top window
enables confocal magneto-optics measurements
attocube‘s attoLIQUID1000 liquid helium cryostat is based on highly efficient liquid Helium bath cryostats with 50 l cryogenic liquid reservoir. As with the whole attoLIQUID family, the attoLIQUID1000 has been optimized for highest stability, enabling experiments such as ultra high resolution imaging and/or spectroscopy using scanning tunneling microscopy (STM) or long-term optical investigations of single quantum dots over several weeks. All of attocube‘s available scanning probe microscopy inserts are compatible with the attoLIQUID1000 and are cooled by a controlled exchange gas atmosphere in thermal equilibrium with the surrounding liquid Helium.
The attoLIQUID1000 provides a base temperature of 4.2 K which can be further reduced down to 2 K by pumping on the Helium reservoir (optional). Superconducting solenoids (up to 15 T), split coils and vector magnets are available as upgrade options. The magnet can be used in driven or in persistent mode.
The system includes all necessary components needed for the operation such as the renowned attoDAMP anti-vibration cabinet with acoustic damping, dual channel temperature controller, liquid helium level meter and probe, transfer line and all necessary vacuum fittings.
|atomic force microscopes||attoAFM I , AFM upgrade options (MFM, KPFM, PFM, conductive-tip AFM), attoAFM III, attoAFM/STM|
|scanning Hall probe microscopes||attoSHPM|
|combined atomic and confocal microscope||attoAFM/CFM|
|confocal microscopes||attoCFM I, attoCFM II, attoCFM III, attoCFM IV|
|confocal Raman microscopes||attoRAMAN|
|sample environment||He exchange gas|
|sample space||2" diameter probe bore fitting all attocube inserts|
|sample exchange||top loading system for quick access|
|vibration & acoustic noise damping system||dewar isolated and suspended in attoDAMP cabinet|
|technology||liquid helium bath cryostat vacuum isolation, vapor shielded (LN2 shielded on request)|
|liquid helium dewar||50 l capacity, vacuum isolation, vapor shielded (LN2 shielded on request)|
|temperature range||4 .. 70 K(< 2K with optional pumping kit)|
|estimated liquid helium static loss rate||0.25 l/hr (standard edition, without insert)|
|cool down time of sample||approx. 30 min. (depending on insert and acceptable helium consumption)|
|cool down time of system (system incl. 9 T magnet)||approx. 6 .. 24 h|
|cool down time of system (system without magnet)||approx. 6 .. 24 h|
|temperature stability||< ±0.1 %|
|Size and Dimensions|
|cryostat (width x depth x height)||900 x 750 x 1500 mm³ (including attoDAMP; depending on magnet choice)|
|required min. ceiling height||approx. 3.20 m (depending on magnet)|
|optional electronics rack (width x depth x height)||640 x 640 x 1350 mm³|
|Options and Upgrades|
|superconducting magnet||solenoids: 7, 9, 12 T, vector magnets: e.g.: 8/2 T, 9/3 T, 9/1/1 T, ...|
|bipolar magnet power supply||included (with optional magnet)|
|pumping kit||turbomolecular pump with suitable backing pump for sample space preparation|
|helium transfer line||included|
|helium lever meter||included|
Fields of Applications
Imaging and scanning probe microscopy of surface properties on the nanoscale at variable temperatures down to milli Kelvin and combination with high magnetic fields.
Optics and Spectroscopy
Confocal microscopy and nanoscale spectroscopy at low temperatures and in high magnetic fields on quantum dots, NV centers, 2D materials, nanowires and other materials.
Systems for microscopy and nanoscale analysis of material properties at ambient and low temperature and in high magnetic fields.
Magnetotransport measurements on mesoscopic structures at variable temperatures and in high magnetic fields.
Tuning Fork based AFM measurements at cryogenic temperatures
Material composition and strain analysis of single semiconductor quantum dots using the attoCFM I
Piezo-Response Force Measurements on Ferroic Oxide Films
Vortex Barriers in Iron Pnictides
Quantitative Nanoscale Vortex-Imaging of Superconductors
NV-Center Based Nanomagnetometry
Optical Magnetometer Reveals Lack of Conventional Meissner Effect in Iron-based Superconductors
Nanoscale Imaging and Control of Domain-Wall Hopping with a NV Center Microscope
Prof. Dr. P. Maletinsky
Quantum-sensing Lab, Department of Physics, University of Basel, Switzerland
Our attoLIQUID1000-based attoAFM/CFM system was a complete game-changer for starting up my research group. Instead of spending years developing a highly complex technical system on our own, we had a fully operational, high-performance cryogenic AFM/CFM system at hand within a relatively short timespan. This allowed us to plunge into our scientific endeavours with highest efficiency. As always, this attocube product stands out due to it’s reliability, ease of use and excellent performance. A particular further asset is the systems versatility - interfacing it with our existing experiments was straight-forward due to the clever system design and excellent support from attocube’s application engineers.