attoAFM I

cantilever-based atomic force microscope

alignment-free cantilever holder

tip exchange in less than 2 minutes

interferometric cantilever deflection detection

built-in amplitude gauge

closed loop scanning (optional)

easy retrieval of regions-of-interest

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The attoAFM I is a compact atomic force microscope designed particularly for applications at low and ultra low temperature, and in high magnetic fields. The instrument works by scanning the sample below a fixed cantilever and by measuring its deflection with highest precision using a fiber based optical interferometer. This deflection detection technique has the advantage that it comes with a built-in length gauge for the cantilever oscillation amplitude, since the interferometer contrast is directly proportional to the laser wavelength. Both contact and noncontact mode are applicable.

It is mainly employed for magnetic force microscopy (MFM) such as vortex imaging on superconductors or magnetic domain imaging at variable temperature, and for piezo-response force microscopy (PFM) on ferroelectrics and multiferroics. Other supported AFM measurement modes include Kelvin Probe Force Microscopy (KPFM), conductive AFM (c-AFM), electric force microscopy (EFM), and other imaging modes. For more information, please have a look at our microscopy fundamentals.

The rigid design of the microscope module allows also for combinations with cryogen free pulse-tube based cooling systems for applications where liquid helium is not available or desired. The microscope uses a set of xyz-positioners for coarse positioning of the sample over a range of several mm, and dedicated mechanically amplified piezo based xyz scanners with a very large scan range even at cryogenic temperatures. Optionally, the attoAFM I is available with a interferometric encoders for xy closed loop scanning. Being made from non-magnetic materials, the microscope is ideally suited for low temperature MFM and PFM in combination with high magnetic fields.

Last but not least, due to the open signal architecture of our powerful and flexible ASC500 SPM controller, the needs of experts are addressed to have control over all signals, while maintaining a very user-friendly software interface that also supports measurement routines based on LabVIEW scripts. All in- and output signals are accessible via front panel BNCs, and can hence easily be monitored, stored and used for additional control. For more info please refer to the fundamentals section.

Cryogenic Tablet

Specifications

General Specifications
sensor head specificsattoAFM I+ head feat. alignment-free cantilever holder, tip exchange in less than 2 minutes
alignment-free cantilever holder (default)compatible with PointProbe® Plus XY-Alignment Series by Nanosensors
conventional cantilever holder (optional)compatible with standard commercial cantilevers
type of instrumentcantilever based AFM with interferometric deflection detection
Suitable Cooling Systems
bore size requirementdesigned for a 2" (50.8 mm) cryostat/magnet bore
compatible cryostatsattoDRY1000/1100/2100, attoLIQUID1000/2000/3000/5000
titanium housing diameter48 mm
Compatibility with Electronics
scan controller and softwareASC500 (for detailed specifications please see attoCONTROL section)
laserLDM1300 laser/detector module (for detailed specifications please see attoCONTROL section)
Modes of Operation
imaging modescontact mode, non-contact mode, constant height, constant force
slope compensation2 axis scan plane correction
z feedbackPI feedback loop for amplitude modulation (AM), phase modulation (PM) or frequency modulation (FM) using included PLL, constant force
incl. standard techniquesAFM
optional upgradesMFM, KPFM, PFM, conductive-tip AFM
Options and Upgrades
closed loop scanning & global sample coordinatesinterferometric encoders for scan linearization and closed loop sample navigation
ultra-large scan range upgrade80 x 80 µm² @ 300 K, 125 x 125 µm² @ 4 K
in-situ inspection opticstip/sample monitoring via in-situ LT-LED for illumination, mirrors, lenses and CCD camera (outside), field of view approx. 3 x 2 mm, resolution approx. 20 µm (depending on cryostat)
closed loop upgrade for coarse positionersresistive encoder, range 5 mm, sensor resolution approx. 200 nm, repeatability 1-2 µm
additional AFM head with manual alignmentconventional cantilever holder, compatible with standard commercial cantilevers
Resolution
measured RMS z-noise (constant force @ 4 K, 5 ms pixel time)< 0.05 nm (expected for attoLIQUID), < 0.10 nm (expected for attoDRY), < 0.15 nm (guaranteed)
z deflection noise density< 3 pm/vHz (dependent on laser system)
lateral magnetic resolution< 20 nm (attoLIQUID)
< 50 nm (attoDRY)
z bit resolution @ 4 K57 pm at 15 µm scan range
Sample Positioning
total travel range5 x 5 x 5 mm³ (open loop)
step size0.05..3 µm @ 300 K, 10..500 nm @ 4 K
fine scan range50 x 50 x 24 µm³ @ 300 K, 30 x 30 x 15 µm³ @ 4 K (open loop)
closed loop scanningoptional
sample holderASH/QE/4CX quick-exchange sample holder with 8 electrical contacts, integrated heater with calibrated temperature sensor
Suitable Operating Conditions
temperature range1.5 K..300 K (dependent on cryostat); mK compatible setup available on request
magnetic field range0..15 T+ (dependent on magnet)
operating pressuredesigned for He exchange gas (vacuum compatible version down to 1E-6 mbar on request)
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Application Snippets

MFM imaging of a Skyrmion lattice made with attoDRY1000 with low temperature atomic force microscope

MFM imaging of a Skyrmion lattice

Ferroelectric Domain at Cryogenic Phase Transitions atomic force microscope attoAFM

Ferroelectric Domain at Cryogenic Phase Transitions

Atomically Flat Terraces atomic force microscope attoAFM

Atomically Flat Terraces

KPFM of Au on Pt Pattern attoAFM for KPFM

KPFM of Au-on-Pt Pattern

MFM on Superconducting Vortices in BSCCO attoAFM for MFM

MFM on Superconducting Vortices in BSCCO

Helimagnetic Phase of FeCo0.5Si0.5 attoAFM for MFM

Helimagnetic Phase of FeCo0.5Si0.5

High Resolution MFM on Bit Patterned Media Co Pd at 10K attoAFM for MFM

High Resolution MFM on Bit Patterned Media Co-Pd at 10K

Conductive Tip AFM Measurements on Ruthenium ct   atomic force microscope attoAFM

Conductive-Tip AFM Measurements on Ruthenium

Switching the Magnetic Vortex Core in a Single Nanoparticle attoAFM for MFM

Switching the Magnetic Vortex Core in a Single Nanoparticle

Link between bulk electric and microscopic magnetic properties of LaPryCaMnO made with the low temperature atomic force microscope

Link between bulk electric and microscopic magnetic properties of LaPryCaMnO

MFM on Co Doped Mn2Sb Single Crystal attoAFM for MFM

MFM on Co Doped Mn2Sb Single Crystal

attoAFM I Mounted on Mixing Chamber attoAFM  mK application

attoAFM I Mounted on Mixing Chamber

Magnetic Force Microscopy Specifications in attoDRY1100 on par with Liquid Cryostats made with attoDRY1000 and attoAFM

Magnetic Force Microscopy Specifications in attoDRY1100 on par with Liquid Cryostats

Vortex Imaging on Iron Pnictides using the attoMFM Ixs made with the cryogenic atomic force microscope

Vortex Imaging on Iron Pnictides using the attoMFM Ixs

Visualization of Edge State in LPCMO Manganite Strip attoAFM

Visualization of Edge State in LPCMO Manganite Strip

Scanning probe microscopy in an ultra low vibration closed cycle cryostat closed cycle cryostat attoDRY1000

Scanning probe microscopy in an ultra-low vibration closed-cycle cryostat

Stress strain behavior of fibrous biological material measured using an AFM SEM hybrid SEM   Legacy prod MIC

Stress-strain behavior of fibrous biological material measured using an AFM/SEM hybrid

Low Temperature Surface Piezoelectricity in SrTiO3 using an attoAFM I for Piezo Response Force Microscopy made with the low temperature atomic force microscope

Low Temperature Surface Piezoelectricity in SrTiO3 using an attoAFM I for Piezo-Response Force Microscopy

Piezo Response Force Measurements on Ferroic Oxide Films using the attoAFM I made with the cryogenic atomic force microscope

Piezo-Response Force Measurements on Ferroic Oxide Films using the attoAFM I

Low temperature magnetization reversal properties of SrRuO3 made with the low temperature atomic force microscope

Low temperature magnetization reversal properties of SrRuO3

Low Temperature MFM on Artifical Spin Ice attoAFM for MFM

Low Temperature MFM on Artifical Spin Ice

Vortex Barriers in Iron Pnictides  attoLIQUID  attoAFM

Vortex Barriers in Iron Pnictides 

MFM for Optimization of Sintered Magnets attoAFM for MFM

MFM for Optimization of Sintered Magnets

Low Temperature Piezoresponse Force Microscopy on BiFeO attoAFM for PFM

Low Temperature Piezoresponse Force Microscopy on BiFeO

Local Conductivity Mapping and PFM on BFO Thin Film attoAFM for ct AFM

Local Conductivity Mapping and PFM on BFO Thin Film

Quantized Conduction on Domain Walls of a Magnetic Topological Insulator attoLIQUID3000  attoAFM

Quantized Conduction on Domain Walls of a Magnetic Topological Insulator

Piezoresponse Force Image on BFO attoAFM for PFM

Piezoresponse Force Image on BFO

Measurements of field driven transformation of a domain pattern closed cycle cryostat attoDRY1000  attoAFM  atto3DR oder attoTMS

Measurements of field-driven transformation of a domain pattern

Fine scale Stripey Morphology of an Iron Pnictide   New Findings in Material Science cryogenic atomic force microscope with closed cycle cryostat

Fine-scale Stripey Morphology of an Iron Pnictide - New Findings in Material Science

Customer Feedback

Dr. N. Andreeva

St. Petersburg State Polytechnical University, Russia

The attoAFM I is great for Piezo Response Force Microscopy of both large crystals and thin films because the microscope integrates flawlessly with external electronics and gives access to all the relevant signals. The system maintained regular weekly cooling cycles for a 2 year strech and still works great!