5 K/7 T UHV-STM system with 3D rotatable magnetic vector field
- Photo of the low-temperature UHV system.
- Sectional view of the UHV system.
- Control system outside the acoustically insulated room.
Our low-temperature STM is located in a three chamber ultra high vacuum system and is working at a temperature of 5 K. The cryostat is equipped with two superconducting split coil pairs and a solenoid coil providing a three dimensional rotatable magnetic field of 500 mT. The maximum magnetic field of 7 T can be applied perpendicular to the sample surface. The in-plain field maximum is 3 T and 0.5 T respectively. In order to reduce vibrations the whole system is located in an acoustic insulated room in the basement of the building.
- Our home made low-temperature STM.
Furthermore the UHV system is equipped with a LEED/Auger unit, various MBE evaporators, sputter system and high temperature heating stage (2600 K). It is possible to prepare samples at 40 K in the microscope. Our home made STM has been especially designed for the use in high magnetic fields, low temperatures and UHV conditions. The probe tip can be exchanged in vacuum. A sample positioning stage allows a rough displacement of the sample in the range of 2 mm. Test measurements result in a z-noise of about 120 fm (rms value).