Part of the Oxford Instruments Group


An integrated Cryofree® superconducting magnet system with variable temperature inserts.

  • Standard magnetic fields up to 14 T in a compact geometry
  • Integrated variable temperature insert providing sample temperatures between 1.5 K and 300 K

  • Wide range of high performance sample rods with height adjustment and rotation options

PATHWAYS is our new customer application resources, that will help in choosing the right solution, addressing some of the challenges faced by the researchers, dealing with complex material characterisation. Find out more.

Watch the webinar on transport properties of low dimensional semiconductors here.


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Whatever your experimental need for variable magnetic field and temperature, the Teslatron™PT Cryofree integrated magnet system has the solution. The wide range of different experimental inserts enables you to configure your measurement platform for cutting-edge applications, such as 2D materials, nano-structures and superconducting devices.

  • Standard magnetic fields up to 14 T in a compact geometry
  • Vector rotate magnet geometries available
  • Integrated variable temperature insert providing sample
    temperatures between 1.5 K and 300 K
  • Wide range of high performance sample rods with height adjustment and rotation options
  • Lower base temperature can be obtained using our optional inserts < 300 mK with HelioxVT and < 25 mK with KelvinoxJT 
  • Low vibration - suitable for a wide range of sensitive measurements
  • Requires only electric supply, no cryogens needed
  • Fast and easy sample change into our separate sealed chamber eliminating the risk of blocking the cooling loop
  • Uses the highest specification superconducting wire available on the market
  • Low power consumption - operate from a single pulse tube refrigerator
  • Fast magnet ramp rates
  • No gas flow over sensitive samples - the system uses a static exchange gas around the sample, preventing flow induced movement of delicate samples or measurement probes
  • Quick sample change via top-loading probe. The sample can be changed while the system is cold. No need for complicated load-lock mechanism to reload into the variable temperature insert
  • Delivered with the MercuryiTC temperature controller and MercuryiPS magnet power supply
  • 1 year standard warranty
Flexible: a wide range of experimental inserts to suit many applications

Configurable: match the system capability to suit your needs and budget

Powerful: get millikelvin temperature in your standard system

Upgradeable: start with a simple system and add extra capability as your experiments evolve

Temperature range: < 1.5 K to 300 K

Standard sample probe temperature stability: ± 0.05 K

System cooldown: ~ 60 hours from room temperature to 4 K (varies with different magnet options)

Standard sample probe cooldown: < 200 minutes from room temperature to < 5 K (probe loaded into cold varaible temperature insert)

Continuous system operation: Typically > 4 weeks 

Magnetic field: 8, 9, 12 and 14 T

Magnet ramp to full field: ≤ 60 minutes (varies with different magnet options)

Varaible temperature insert sample space diameter: 50 mm nominal 


A typical system comprises of:

  • Cryostat
  • Magnet and Power Supply
  • Variable Temperature Insert and Controller
  • Sample Probe
  • Cryocooler and Compressor
  • Accessories and Manuals
  • Low Dimensional Physics
  • Graphene & 2D Materials
  • Low Temperature Detectors
  • Spintronics
  • Quantum Dots
  • Electrical Transport Measurements 

PATHWAYS is our new customer application resources, that will help in choosing the right solution, addressing some of the challenges faced by the researchers, dealing with complex material characterisation. Find out more


Th e following probes are compatible with the TeslatronPT:

  1. Fixed sample
  2. Mechanical rotator (Swedish rotator)

Each probe is available as Sample-in-Gas (SIG) with a Sample-in-Vacuum (SIV) variant. The probe chassis consists of 3 thin-wall stainless-steel tubes to provide a rigid, straight, low-thermal conductivity structure and create separate electrically isolated spaces to keep measurement looms shielded from diagnostic and drive wiring.

  • 3U high and designed for 19” rack mounting
  • 2 x 50 way rear mounted sub-D connectors
    • Connection to the signal lines of the measurement probe or cryostat
    • Feed-through link to connect any of the lines to additional instrumentation (an alternative to using the individual BNC and Twinax on the front panel)
  • Unit switches can be used to switch any of the signal lines between signal, measurement ground or protective ground
  • Each signal line has a BNC or Twinax port for connection directly to measurement electronics or diagnostics
  • High-quality make-before-break switches
    • Low resistance Au contacts
    • Sealed against moisture ingress to avoid future contact corrosion
  • Internal signal routings designed to minimise cross-talk
  • Line resistance kept to a minimum

During the process of mounting the sample into the sample holder, the ESD plug will be inserted.  This plug links all the electrical connections to the sample together ensuring that no damaging voltages can be generated across the sample due to ESD.  This plug remains in place during transport of the sample holder plus sample, meaning the sample could safely be taken from the sample preparation lab to the measurement lab, or even shipped to a lab in another continent safe from ESD damage.

When mounting the sample holder in the probe, the user keeps the ESD plug in place.  Then connect the probe to the desired measurement instrumentation via the SPSU.  Set the switches of the SPSU to ground all the signal lines to the desired ground, either protective ground or instrument ground.  Once the switches are set correctly, remove the ESD plug from the sample holder.  If appropriate for the sample the user might run some measurement checks to ensure the sample is connected and the signal train is working.  Then the probe can be loaded in the cryostat and cooled to the required temperature.

Once the sample plus probe is inserted in the cryostat and the measurements are in progress, the SPSU can be used as a break-out box to switch or monitor any of the signal lines during the experiment.

The PCB and LCC holders are ceramic Aluminium-Nitride (AlN) to optimise thermal conductivity.

Electrical contact plating is Ni free to minimise the remnant field effects in the sample domain.

The following sample holders are available:

  • 20-pin LCC with ESD connector
  • 16-pin DIP (dual in-line) connector with ESD connector
  • 16 contact pad bare pcb for general purpose with ESD connector
  • 44-pin LCC – NO ESD connector as there is not enough space

PCB sample holder interface – 44 non-magnetic spring loaded pins to connect to the sample holder PCB

The measurement cable is a carefully specified cable constructed of 13 twisted pairs, 10 pairs of 26 AWG tinned Cu and 3 pairs of 22 AWG tinned Cu. Each pair is individually screened with a foil screen. Each screen has external insulation to isolate it from all the other screens. Each screen also has a drain wire. 

In addition, the cable has an overall foil screen which has internal insulation plus an external screen braid.  The overall screen also has a drain wire.  This construction facilitates overall screening with the outer screen connected to protective ground but in addition any pair can be screened to a specific measurement ground for that channel. This maximises isolation and minimises cross-talk between single pairs. 



Variable Temperture Inserts




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