Micro-manipulated Probe System with Rotatable Magnetic Field

November 2011

Janis Research Company is pleased to announce that it is offering a new series of micro-manipulated probe systems with a rotatable magnetic field.  The basic cryostat is based on the model ST-500 ultra low vibration microscopy system that was developed for high spatial resolution optical microscopy, providing outstanding sample positional stability.  The typical vibration level is ± 25 nm and the long-term drift of approximately 2 nm/min.

This probe station is combined with two room temperature electromagnets.  The magnets offer variable horizontal magnetic fields up to ~ 800 Gauss each in perpendicular directions.  The maximum combined magnetic field is ~ 1,130 Gauss.  Both magnetic fields can be ramped independently at rates of up to 30 Hz (with field limitation at the higher frequencies) using the special dual power supply.  The power supply allows creating the rotatable magnetic field with the maximum rotation frequency of 30 Hz by synchronizing voltage provided to each electromagnet.

The probe station operates from 3 K up to 475 K, with an option up to reach up to 650 K.  The probe station can be used either with liquid helium or liquid nitrogen.  The system can be provided with up to four low frequency or microwave (up to 67 GHz) probes or optical fiber probe arms.

The system is supplied with two cryogenic Hall probes and readouts to measure the precise value of the magnetic field at the chuck, and is supported on a floating vibration isolation table for quiet operation in a variety of lab environments.  It also includes a high quality microscope and CCD camera and color monitor, with typical resolutions of 2 to 5 microns.

The system is ideal for the study of ferromagnetism of thin films, magneto-optical and magneto-electrical properties in a variety of experiments, including quantum dots, spintronic devices and nanoscale electronics.


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