NanoMOKE
This system combines the powerful capabilities of the Durham Magneto-Optics NanoMOKE3 with the flexibility of the closed cycle optical Cryostation for low temperature Magneto-Optic Kerr Effect (MOKE) applications. *
Users would have the full capabilities of the Cryostation closed-cycle optical cryostat, as well as the Magneto-Optic module for their experiments.
Kerr Effect Magnetometer
The NanoMOKE3 is an ultra-high sensitivity magnetooptical magnetometer and Kerr microscope.
The optical head for the NanoMOKE views the sample through a side window on the Cryostation.
There aretwo principle configurations:
- Polar: Sample is mounted
perpendicular to the field. - Longitudinal/Transverse: Sample is
mounted parallel to the field.
The system includes a sample holder
assembly for both setups.
Cryostation® System
The Cryostation provides an automated and controlled environment for low temperature MOKE measurements.
The specially designed chamber integrates seamlessly with the required equipment.
- Low cost, helium-free operation
- Fully-automated control
- Versatile & flexible tabletop
mounting architecture - Optimized temperature
performance & thermal stability
Features
- Includes configurations for Longitudinal/Transverse and
Polar MOKE experiments - Requires minimal effort to switch between
configurations - Sample components utilize exotic materials to minimize
Eddy-Current heating - Custom low-profile electrical connections available
Specifications
| Configurations | Longitudinal/Transverse (L/T) MOKE; Polar MOKE | |
| Magnetic Field | L/T: >0.4 Tesla (14mm spacing); Polar: >0.3 Tesla (22mm spacing) | |
| Working Distance | L/T: <14mm; Polar: 30mm | |
| Max Sample Size | 8mm x 12mm (14.4mm diagonal) | |
| Positioning | Optical components can move 5mm any direction | |
| Sample Mounting | Includes sample holder assembly for L/T & Polar setups | |
| Temperature Range | L/T: ~4K – 350K; Polar: ~4.5K – 350K (w/ radiation shield) | |
| Field Uniformity | 95% or greater across sample | |
Full System Includes:
- Montana Instruments Cryostation with Magneto-Optic module
- Sample holder assembly with longitudinal and pole MOKE setups
- Durham Magneto Optics NanoMOKE3 system with control software
For a larger sample, the radiation shield may be removed, but the temperature will rise to about 10-12K.
Switch configurations quickly by changing 4 screws & minimal parts
Polar MOKE
Sample mounted perpendicular to field.
- 18˚ optical cone
- 35 mm total working distance
- 22 mm pole tip spacing for >0.30 T field
- Sample at 90˚ to optical path
- Sample is viewed using mirror at 45˚
Longitudinal/Transverse MOKE
Sample mounted parallel to field.
- 80˚ optical cone
- <18 mm working distance available
- 14 mm pole tip spacing for >0.40 T field
- Sample mount can translate 4.5 mm
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