MICROSTATMicrostat™ liquid cryogen optical cryostats for microscopy

Which Microstat
is right for you?
Our easy to use, compact and efficient
Microstat cryostats offer a wide range
of options to suit most spectroscopy
applications. They provide a wide
temperature range (from 2 K up to500 K) while providing excellent
optical access.
The Microstat model of choice will
depend on the base temperature, coolingtechnology and sample environment
required for your experiments.
Typical applications:
For spectroscopy
applications, see
the guide on
our OptistatTM
products• Micro-FTIR• Micro-Raman• Micro-luminescence• Kerr and Faraday effects• Micro-photoluminescenceWith 5 T magnet

Temperature
range

Coolingtechnology

WorkingdistanceMicrostatN

77.2 – 500 K

Nitrogen only

2 mm

MicrostatHe

2.2 – 500 K

Helium or nitrogen< 5.5 mm

MicrostatHiRes

2.7 – 500 K

Helium or nitrogen< 5.7 mm

MicrostatMO

6 – 300 K

Helium only

8.5 mmMICROMicrostat specifications

MicrostatN

MicrostatHe

MicrostatHires

MicrostatMO

Cooling medium

Liquid nitrogen

Liquid helium or
liquid nitrogen

Liquid helium orliquid nitrogen

Liquid helium

Temperature range

77.2 - 500 K

2.2 - 500 K

2.7 - 500 K

6 - 300 K

Temperature stability> 0.5 K

± 0.1 K

± 0.1 K

± 0.1 K

Magnetic field

NANA 1NA 1

5T

Cooldown time< 10 min< 10 min< 15 min4 hours

Sample space
diameter x height (mm)20 x 220 x 520 x 511 x 11

Working distance2 (mm)2

4.5 to 5.5
8 for rectangular tail2.2 to 5.7

8.5

Vibration (vertical)3< 0.1 µm

< 0.1 µm

< 20 nm< 20 nmLateral sample holder drift
at constant temperature3< 1 µm / hour

< 1 µm / hour

150 nm / hour

< 4 nm / min

Cryogenic consumption (L/hr)
at 4.2 K for heliumat 80 K for nitrogen< 0.5 (nitrogen)< 0.45 (helium)< 0.7 (helium)

2 (helium)

For full details see product page.
Note 1: Rectangular tail MicrostatHe and MicrostatHires pillared version are suitable for use with an electromagnet.
Note 2: Working distance defined as the distance from the sample holder to the window top surface
Note 3: The stability will be dependent upon the final system’s configuration and the environment that the equipment is used in.

Microstat family

OMICROMICROThe Microstat system

Full system integration and control
System components designed for
optimum cryostat performance
Transfer tube (helium cryostats only):
It plays an important part in the overall helium consumption
and base temperature capability of helium cooled cryostats.
Oxford Instruments Low Loss Transfer tubes (LLT) use theMagnet power supply

cold gas exiting the cryostat to cool the shields surrounding
the incoming liquid within the transfer tube. As a result, theBest in class stability performanceand optimised for accuracy and low noise

consumption of our cryostats is the lowest on the market,
dramatically reducing your running costs.

The MercuryiPS is used to energise the magnet of theMicrostatMO.

MercuryiTC
Automaticneedle valve

Pressure gauges
To helium
recoveryElectrical access

VC-U Flowmeter

Vacuum space
Sample holder
Radiation shield

Quickrelease
clamp

Typical system set-up.

Transfer tube

Flow
controlvalve

Vacuumpressure
relief valve
Cryogenstorage
dewar

Needlevalve

GasflowpumpIntelligent cryogenic environment controller
Easy monitoring and control of the sample stage
The MercuryiTC controller combines several instruments into one allowing temperature control at the heatexchanger with options for gas flow control as well as an extra sensor channel for thermometry measurement
directly at the sample stage. Everything can be accessed through touch screen front panel or remotely.

Microstat family

MICROMicrostatN
Compact nitrogen cooled

Lowest nitrogenconsumption
on the market

Thiscryostat has nitrogen
been designed for
Compactcooledexperiments requiring liquid nitrogentemperatures. It is very compact and lightweight and only requires a compact
nitrogen container which is very convenient when space is limited.

• Wide temperature range: from 77.2 K to 500 K• Extremely compact: 90 mm diameter by 24 mm thickness. Only 400 g• Economical use of cryogens: less than 0.5 L/h• Quick cooldown: 80 K in less than 10 minutes• Adjustable sample holders accomodate samples up to 8 mm thickness• Easy integration into commercial microscopes facilitated by its compact size andNitrogen inlet

Nitrogen outlet

To vacuum pump
Electrical accessshort working distance (as low as 3 mm). Interface plate available as option for
attaching the MicrostatN directly onto microscope translation stage• Suitable for reflection and transmission experiments via choice of sample holders• Electrical measurements via 4-pin electrical feed wire to heat exchanger

190 mmHeat exchanger
with heaterand sensor
126º

Vacuum space

90 mm

Two sizes of windows to choose fromdepending on sample sizes:

Reflectancesample holder

Optical specifications
24 mm

Transmission
sample holder
10 mmHeatexchanger
support45º

Schematic cross-section view of MicrostatN. Note the window
aperture and angles of admittance for 0.5 mm thick windows.

Reflectance

Window thickness

0.5 mm

1.5 mmClear access diameter

10 mm25 mm

Sample holder towindow top surface

3 mm

3 mm

Angle of admittance(to surface of sample
holder at centre)

126 º

160 º

Max sample thickness

2 mm

1 mm

Max sample diameter

20 mm

20 mm

Note: All dimensions are approximate and relate to the top window
with plain sample holder.

Microstat family

OMICRO

MicrostatHe / MicrostatHe-R
Multi-experiments, helium cooled
Multi-experiments,Thishelium cryostat is well suited for experiments requiring a low temperatureenvironment
which can evolved in the future due to its flexibility.
helium andcooled• Wide temperature range:• Suitable for reflection and2.2 K to 500 K

transmission experiments via• Easy integration into commercial
microscopes facilitated by its

compact size and short working

choice of sample holders• Adjustable working distance via

for attaching the MicrostatHe

4545 mm
mm

144º
144o

to less than 3 mm

• Interchangeable tail between theOptistatCF-V, MicrostatHe anddirectly onto microscope

25mm
25 mm

1111mmmm
Heat
exchanger

MicrostatHe-R with rectangulartranslation stage• Can be used with liquid nitrogen
lowest consumption on the market• Electrical measurements via
using only 0.45 l/hr at 4.2 K•

with heater
Heatexchanger
and sensor
withheaterand sensor

Adjustable
Adjustablesample
sample holder
holdertail• Economical use of cryogens: theSchematic cross-section
view
Schematiccross-sectionof MicrostatHe
viewof MicrostatHe

7070 mmmm

sample holder. Can be adjusted

distance (as low as 4.5 mm).
Interface plate available as option

MicrostatHe Specifications

Schematic cross-section
Schematic cross-section
view of MicrostatHe
MicrostatHe
Rectangula
Rectangular
tail60.5 mm
mm60.5110º110˚

10-pin electrical feed wire to heat

Rapid cooldown time: 4.2 K in2020 mmmm

exchanger. Optional coaxial cables

less than 10 minutes!

Lowest helium
consumption and fastest
cooldown on the market

Heat exchanger
Heat exchanger w
with heater
heater and sensor
and sensor

2222 mmmm

Adjustable sample
sample holder
AdjustableholderTransfer tube entry port

Transfer tube entry port

Vacuumpressure
relief valve

Vacuumpressure
relief valve
135 mm

135 mmWindow thickness
ElectricalaccessElectricalaccessQuickreleaseclip

Quickrelease
clip

36 mm

255 mmCryostat

36 mm

254 mmMicrostatHe

MicrostatHe-RRectangular tail0.5 mm

1.5 mm

1 mm

10 mm

25 mm

20 mm

Sample holder towindow top surface

4.5 mm

5.5 mm8 mm

Angle of admittance(to surface of sample
holder at centre)

102 º

144 º

110 º

Max sample thickness

5 mm

5 mm

4 mm

Max sample diameter

20 mm

20 mm

20 mm

Clear access diameterAll dimensions are approximate and relate to the top window with plane sample holder incentral position

Vacuum space
SampleholderRadiation
shield50 mm
110 mmSample holder
10 mm side port
Radiation shield

30 mm

10 mm side port

30 mm

MicrostatHe and MicrostatHe-R with rectangular tail dimensions.

Microstat family

MICROMicrostatHiRes
High resolution helium cooled

The lowest vibration
microscopy cryostat
on the market

This cryostat has been designed to minimise vibration and sample
drift at stable and constant temperatures. This is achieved by cooling the sample
on a stable cold platform rather than a cold finger and feeding the helium tothe heat exchanger via a capillary thus isolating the helium flow vibration. The
MicrostatHiRes is particularly well suited to sensitive applications such as microphotoluminescence mapping of semiconductor microstructures with sub-micron
spatial resolution.

• Wide temperature range: from 2.7 K • Easy integration into commercial
to 500 K

microscopes facilitated by its compact• Low sample drift: 0.15 µm per hour(typical) at 4.2 K enabling measurements
over many hours. 13 µm (typical)
cooling from 300 K to 4.2 K

size. Only 90 mm diameter by 45 mm
thickness. Lightweight 1.5 kg only

• Economical use of cryogens: thelowest consumption on the market• Low sample vibration: < 20 nm typical using only 0.7 l/hr at 4.2 K• Suitable for reflection and• Extremely short working distancetransmission experiments via choiceof 2.2 mm enabling the use of highmagnification optics•Adjustable top flange (3.5 mmadjustable distance) enabling
samples of different thicknesses• Rapid cooldown time: 4.2 K in lessthan 15 minutes!

Pillared version
available as an
option for use withelectromagnets.

of sample holders• Experimental flexibility: may be
operated in any orientation

142º or 166º Access
Sample holder

10 or 25 mm
diameterclear opticalaccess• Electrical measurements via 10-pin

electrical feed wire to heat exchanger.
Optional coaxial cables

45-48.5 mm
Adjustable
top90 mm

Optional bottom window

Optical specifications

488.5 mm

45-48.5 mm

90 mm

Electrical access

Vacuum pressure
relief valve

Transfer tube
entry port

Reflectance

Window thickness

0.5 mm

1.5 mmClear access diameter

10 mm

25 mm

Sample holder towindow top surface

2.2 mm

2.2 mmAngle of admittance(to surface of sample
holder at centre)

142 º

166 º

Max sample thickness

5 mm

4 mm

Max sample diameter

20 mm

20 mm

All dimensions are approximate and relate to top window with plain
sample holder in central position.

Microstat family

OMCR

MicrostatMO
System forhigh resolution
magneto-opticalmeasurements
The MicrostatMO is acompact stable cryostat,which provides a cryogenic
environment (6 K) ideal for sensitive optical and electrical measurements in
Wide temperature range: from 6 K to 300 K•• Magnetic field up to 5 T, satisfying the majority ofspectroscopy applications

Fully integratedsystem• Minimum downtime: Convenient continuous operation

including improved 300 K operation•• Low sample vibration: < 20 nm typical• Quick sample change using a demountable sample holder.
options are available: a copper sample platform for• Short working distance of 8.5 mm enabling the use of high Twolower base temperature or a sapphire platform for opticalLow sample drift: typically 4 nm/min

magnification optics• Can be operated 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

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 benchthus reducing vibrations introduced by the transfer tube

Typical applications:• Flux visualisation ofsuperconducting materials. 5 T
magnetic field extends the rangeof samples that may be studied
to include materials with strong
flux pinning• Electrical transport measurements
using very small currents fornanoscale samples, quantum
devices and nano-devices• Measurement of dimentionalchanges of magneto-restrictive
materials

Microstat family

MICROCryogenic spares and accessories

Cryogenic spares and accessoriesExtensive choice of windows to suit
your experiment’s needs

Microstat cryostats are used in experiments where the samples must be irradiated or measurements made on emitted radiationfrom such samples. It is, therefore, essential that appropriate windows can be incorporated into your cryostat to permit radiation topass through the sample space. In Microstat cryostats, the windows are glued and the materials selected will be determined by thewavelength and intensity of the radiation and whether beam polarisation is required.
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Crystalline Quartz
below 80 K
Sapphire
below 80 K
Sapphire
below 80 K

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2 ,500TM
Polythene
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Polythene

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ZincKRS
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200
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Calcium Fluoride
CrystallineQuartz

0210

SapphireFluoride
Calcium

accessories for your cryostats. Please visit
www.cryospares.com to find out more.

Visit www.oxford.instruments.com/microstat or email to nanoscience@oxinst.com

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