Fermi SPM
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Fermi SPM SPM in a Temperature Range from 15 K to 400 K • Compact Design • Tip and Sample Cooled • Low Thermal Drift • STM, AFM & Spectroscopy • Sub pA STM • Sensor Exchange & 2D Coarse

Fermi Fermi SPM Key Features: The new microscope is mounted on a small DN100 flange offering a compact and cost effective platform for low temperature SPM. The in-vacuum I/V converter allows for excellent signal to noise, low tunnelling currents and spectroscopy. The internal spring suspension with eddy current damping ensures excellent vibration isolation. Thermal shields keep tip and sample at low temperature during cooling experiments. This guarantees low thermal drift between tip and sample. A new compact scanner design combined with ultra-light sensor carriers enable high stability and...

SPM Tip & Sample Cooled! The new Fermi SPM is a compact and cost effective solution for UHV SPM in a temperature range from 15 K to 400 K. The compact design with a LHe flow cryostat and thermal shields keep tip & sample at low temperature during cooling experiments. This guarantees low thermal drift between tip and sample and makes the Fermi SPM an ideal and cost effective solution for imaging, tunnelling spectroscopy and atom manipulation experiments. Like all Omicron SPM’s it offers in-situ tip exchange, sample coarse positioning and internal eddy current damping for highly effective...

Fermi A Unique Tip Exchange Mechanism! A unique sensor exchange mechanism for the Fermi SPM allows the sample to remain in position at low temperature while the sensor is quickly and safely exchanged. A wobble stick and a sensor loading stage are used to pick up sensors from carrier plates. The sensor itself is inserted into the scanner by a bayonet-like locking mechanism within seconds. Due to the special design there is no risk of damage to the scanner. The thermal shield door is quickly opened for sensor exchange employing a wobble stick. The sample stays in the microscope and remains at...

The Fermi SPM is housed in its own, dedicated UHV chamber which can either be mounted onto a standard Omicron system (MULTIPROBE…) or mounted to an existing vacuum system. A wobble stick is used for fast and convenient tip and sample transfer and for operating the thermal shields. The bolt-on chamber includes a 8 position storage carousel for tip and samples. The design of the Fermi SPM offers optical access and allows for in-situ evaporation. Omicron’s proven internal spring suspension system with eddy current damping ensures excellent vibration isolation. The Fermi SPM is also available...

Fermi 10 K achieved with Flow Cryostat! The new Fermi SPM has been tested using the full cooling power of the LHe flow cryostat and performance measurements in STM mode and AFM mode have been carried out. After cool down from room temperature the LHe consumption is around 1.5 l/hour. STM measurements on Au(111) at 10 K! z stability of a few pm has been achieved! Topography image Si(111), sample stage @ 10 K, tip/scanner @25 K Line profile proving z stability 10 nm x 6 nm, Ugap = - 0.5 V, It = 2 nA, Sample stage @ 10 K, tip/scanner @ 25 K, unfiltered raw data!

SPM QPlus AFM on NaCl(100) The QPlus sensor employs a quartz tuning fork for force detection in non-contact (NC)-AFM. One prong of the tuning fork is fixed, while the second (free) prong, with SPM probe, acts a cantilever transforming the resulting oscillation into an electrical signal as a result of the piezoelectric effect. A separate contact wire to the tip is used to decouple the AFM and STM signals. AFM performance at 10 K was tested on a NaCl(100) surface. Force spectroscopy df(z) on NaCl (100) Sensor frequency f = 24,4 kHz, Osc. ampl.: A = 1.90 nm, Q factor: 2000 Sample stage @10 K,...

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