Our microscopy cryostat with magnet - MicrostatMO 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 distance of 8.5 mm enabling the use of high magnification optics
  • Can be orientated 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.

Specifications

Maximum magnetic field at sample position 5T
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.

System Components/Options

The complete MicrostatMO system consists of:

  • MicrostatMO 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 MicrostatMO uses the standard accessories of the Oxford Instruments' spectroscopy and optical cryostats product range 

Window options

  • As standard the MicrostatMO 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

Sample holder options

  • Standard copper sample platform for lowest base temperature
  • Optional sapphire window sample platform for optical transmission measurement

Gas flow pump and controller

  • The MicrostatMO can be most conveniently cooled using a pressurised liquid helium dewar ('push mode')
  • For the lowest base temperature select the optional pump ('pull mode')

Optical bench mounting

  • The MicrostatMO 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 MicrostatMO above a standard (magnetic) optical bench, to ensure safe and reliable operation with the magnetic field on

 

Integration

MicrostatMO2Although 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 MicrostatMO. This is particularly an issue where components are to be placed in close proximity to the magnetic field generated by the MicrostatMO, 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 MicrostatMO
Manufacturer Part Number
XYZ non-magnetic piezo stage for
objective lens positioning
Physik Instrumente
(PI)
P-611K021 non-magnetic
nanocube
Controller for piezo stage Physik Instrumente
(PI)
E-664 analogue controller or E-500
series modular controller
Multifunction IO & A-D card for computer
control of piezo stage
National
Instruments
USB 6229
CCD Firewire TV camera for imaging sample Thorlabs DC210C
100 x microscopy objective lens for collecting
luminescence
Mitutoyo NT56-983
Polarizing beam-splitter for microscope
600 - 1000 nm
Newport 10FC16PB.5
Non-magnetic xyz stage for piezo stage
mount
Standa 7T34-20

Information and image provided courtesy of Dr Robert Taylor, Clarendon Laboratory, Oxford University, UK

Applications

  • 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; 5 T 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

Downloads & further information

To download our Microstat product guide click here

 

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