Cryogenic Ltd.
enowned in low temperature research and material science laboratories world-wide for delivering high quality measurement systems and providing the highest magnetic fields (up top 25 Tesla) and lower temperatures (down to 10mK)
- 44(0)20 8743 6049
- 44(0)20 8749 5315
- sales@cryogenic.co.uk
- Units 29/30, Acton Park, Industrial Estate
The Vale, Acton
London, W3 7QE
United Kingdom of Great Britain and Northern Ireland
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Magnet & Integrated Variable Temperature Sample Space With DR Insert
Adapted MCK model DR inserted into 50 mm 1.6 K300 K VTI VTI cooling power used for condensing stage of DR Versatile solution as the magnet system can also be used with other inserts and measurement probes including He3, heated probes, rotator, VSM etc. Bottom loading DR with options of sample in liquid or sample in vacuum Suitable for use with systems up to 18 T and neutron-scattering split-pair systems
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Free Room Temperature Bore Systems
The cryomagnetic system contains the cryogen free room temperature bore superconducting magnet, cryostat, cryocooler and compressor, temperature monitor unit (nominally Lakeshore) and HTS current leads. The cooling for the magnet and cryostat housing is provided by a standard cryocooler with a base temperature of 4K. The magnet is designed to operate safely at the guaranteed field without quenching.
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Solid State NMR
Magnets for NMR experiments are required to have a high homogeneity, which can be maintained over a wide range of field. Experiments are performed at fixed frequency and the spectrum is obtained by sweeping the magnetic field. This requires the field to be stable in spatial homogeneity and change steadily and repeatedly over time.
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Resistivity and Hall Effect
The Resistivity System allows the user to make Resistivity and Hall Effect measurements in the range of to M. Samples are mounted on special platforms inside the VTI with contacts made to the sample according to the customer's requirements. Connections at the top of the probe are made via Fischer Connectors or Coaxial Cables. Keithley source and measurement electronics are provided with the system. These are fully controlled using the Measurement System Software.
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High Resolution Magnet Systems
EPR
EPR samples with S=1/2 electronic spins exhibiting a narrow signal at G=2 and require magnetic fields of only ca. 3.5 T. However, EPR spectra from S>1/2 spins are typically much broader and have spectral features that spread over magnetic field range of several Tesla. Such fields could be easily achieved with superconducting magnets, but, unlike NMR, these magnets cannot operate in a persistent mode in order to satisfy a wide range of resonant fields required by the experiment.
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SQUID Magnetometer
S700X
The S700X SQUID Magnetometer is the most sensitive instrument for DC and AC measurement of magnetic properties as a function of magnetic field and temperature. Numerous different experiments may be performed with this unique instrument. The SQUID sensor at the heart of the system has an input noise power sensitivity of approximately 10-30 Joules per root Hz. This energy sensitivity is 108 better than any semiconductor device and accounts for the instrument's ability to resolve extremely small magnetic signals with accuracy and speed. The S700X has several modes of operation. The most widely used is the measurement of total magnetic moment made by moving the sample through a set of pick-up coils. During the measurement the sample temperature and applied magnetic field are precisely controlled. The second order gradiometer configuration used for the pick-up coils is insensitive to the externally applied field but allows samples of 10-11 Am2 total moment to be resolved with ease.
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Cryogen Free Variable Temperature Cryostat for EPR
We offer a variable temperature cryostat with a sample space of 40mm designed to fit between the poles of a resistive electromagnet for EPR applications. The cryostat is designed to receive standard EPR probes.
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Free Measurement System
CFMS
The Cryogen Free Measurement System (CFMS) from Cryogenic Ltd is a modular research system designed to enable the user to perform a wide range of material characterisation experiments in variable field and variable temperature environments.
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AC Susceptibility
The AC Susceptometer option uses a small primary excitation coil to apply an AC field to a sample (typically 1mT at frequencies from 0.1 Hz 10000 Hz). A pair of secondary pick-up coils positioned close to the excitation coils are used to detect the sample response. The resultant signal is measured using a Lock-In amplifier with the in-phase and out-of-phase components of the signal corresponding to the real and imaginary components of the AC Susceptibility of the sample. An additional compensation coil is used to eliminate background signals.
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Mini Cryogen Free Systems
mCFMS
Cryogenic offers cryogen free measurement systems, which include a cryocooler, cryostat with superconducting magnet (3, 5, 7 or 9 Tesla), variable temperature sample space, a selection of special probes for measurements of different physical properties, as well as electronics, computer and measurement software.
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Fast Ramping Magnet Systems
Cryogenic Ltd has developed a new range of fast-sweeping cryogen-free superconducting magnets using high-performance Nb3Sn coils. These magnets provide an ideal platform for XMCD and other polarity switching applications. No liquid cryogens are required offering superb economy and ease of use in comparison with liquid helium alternatives.
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Vibrating Sample Magnetometer
VSM
The Cryogenic Vibrating Sample Magnetometer (VSM) is designed for measurement of the DC magnetic moment of a sample with a noise floor sensitivity of 10-6 and at 10 seconds integration time.
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Thermal Transport
The thermal transport probe measures thermal conductivity and thermoelectric power (defined by the Seeback Coefficient). Electrical and thermal contacts are made to opposite ends of the sample allowing for customisation to suit the sample requirements of the user.
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Cryocoolers
Cryogenic uses various cryocoolers with cooling powers to suit different cryogen free magnet systems and applications. The Gifford-McMahon cycle cryocooler has the advantage of greater thermodynamic efficiency. The pulse-tube cryocooler is vibrationally quieter, has a longer service interval and cools faster from room temperature.
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Free Room Temperature Bore magnet with Insertable DR
Room Temperature magnet bore 50 mm sample space in DR Suitable for use with Leiden DR type CF200, CF450, CF650 or CF1000 DR
