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Microstat MO2

Oxford Instruments

Microstat MO2 Microscopy cryostat with magnet 4 K, 5 T

Our microscopy cryostat with magnet - MicrostatMO2 is a compact stable optical cryostat, which provides a cryogenic environment (6 K) ideal for sensitive optical and electrical measurements in magnetic field (up to 5 T).
All these advantages in a single cryostat
• Wide sample temperature range from 6 K to 300 K
Magnetic field up to 5 T ,satisfying the majority of spectroscopy applications
Low vibration and drift: typically 4 nm/min
Low sample vibration: <20 nm typical
Short working distanceof 8.5 mm enabling the use of high magnification optics
• Can beorientated horizontally or vertically, providing flexibility for setting-up the experiment
• Designed for easy integration of optical components on the cryostat top plate
• Can be used for reflection and transmission measurements
Minimum downtime: convenient continuous operation including improved 300 K operation
Quick sample change using a demountable sample holder.  Two options are available: a copper sample platform for lower base temperature or a sapphire platform for optical transmission measurements
• System can be cooled using a pressurised liquid helium dewar for convenient operation with minimum vibration
• Mounting bracket supplied to clamp the cryostat to the bench, thus reducing vibrations introduced by the transfer tube

 Supplied with the new range of electronics MercuryiTC temperature controller and MercuryiPS power supply.
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  • Specifications
  • System Components/Options
  • Window options
  • Sample holder options
  • Gas flow
  • Optical bench mounting
  • Integration
  • Applications

Maximum magnetic field at sample position


Magnetic field stability in persistent mode (switch included)

0.01 %/hr

Magnetic field homogeneity

2% over 5 mm diameter spherical volume

Maximum magnetic field sweep rate

1.0 T/min

Temperature range on the sample heat exchanger

6 K to 300 K measured with pressurised LHe
storage dewar (see note 1)
6 K achieved with RV12 pump (option)

Temperature range on a demountable copper
sample holder (standard)

7 K to 300 K measured with pressurised LHe
storage dewar (see note 1)
6 K achieved with RV12 pump (option)

Temperature stability

± 0.1 K measured over 10 minutes

Typical cool-down time from room temperature
to 6 K

4 hours

Typical average liquid helium consumption at 6 K

2 litres per hour

Typical liquid helium consumption per day

25 litres, based on 10 hours of operation and including
two complete sample changes

NOTE 1: Pressurisation of the liquid helium dewar is the responsibility of the customer and a check should be made to establish that this is permitted within their laboratory safety regulations.
• MicrostatMO2 high resolution magneto-optical cryostat
• Sample holder
• LLT600 low-loss liquid helium transfer tube
• MERCURYiTC Intelligent cryogenic environment controller
• MERCURYiPS magnet power supply
• Gas flow pump (optional)

The MicrostatMO2 uses the standard accessories of the Oxford Instruments´ spectroscopy and optical cryostats product range 
• As standard the MicrostatMO2 is supplied with a 0.5 mm thick Spectrosil WF top window assembly with 15 mm aperture
• A wide range of other window materials are available on request
• Standard copper sample platform for lowest base temperature
• Optional sapphire window sample platform for optical transmission measurement
• The MicrostatMO2 can be most conveniently cooled using a pressurised liquid helium dewar ("push mode") • For the lowest base temperature select the optional pump ("pull mode")• The MicrostatMO2 is equipped as standard with a mounting bracket to attach it directly to a non-magnetic optical bench
• Optional stand-off pillars are available for mounting the MicrostatMO2 above a standard (magnetic) optical bench, to ensure safe and reliable operation with the magnetic field on
Although optical microscope system configurations vary considerably depending on the specific experimental application, Oxford Instruments can provide some guidance on the choice of components for the interface optics for the MicrostatMO2. This is particularly an issue where components are to be placed in close proximity to the magnetic field generated by the MicrostatMO2, in which case components with zero or negligible interaction in the magnetic field are required to achieve safe and reliable operation. Whilst Oxford Instruments NanoScience cannot accept any responsibility or liability for the performance of the overall optical system, the following selection of components have been identified as suitable:

Recommended optical components
for MicrostatMO2


Part Number

XYZ non-magnetic piezo stage for
objective lens positioning

Physik Instrumente

P-611K021 non-magnetic

Controller for piezo stage

Physik Instrumente

E-664 analogue controller or E-500
series modular controller

Multifunction IO & A-D card for computer
control of piezo stage


USB 6229

CCD Firewire TV camera for imaging sample



100 x microscopy objective lens for collecting



Polarizing beam-splitter for microscope
600 - 1000 nm



Non-magnetic xyz stage for piezo stage



• Microscopic optical measurements, such as Photoluminescence and Raman scattering under varying magnetic field. Study of microstructures such as quantum dots / wires / wells and nanostructured semiconductor devices.
• Flux visualisation of superconducting materials. 5T magnetic field extends the range of samples that may be studied to include materials with strong flux pinning.
• Electrical transport measurements using very small currents for nanoscale samples, quantum devices and nano-devices.
• Measurement of dimensional changes of magneto-restrictive materials.