Mini-Dilatometer
Super compact high-resolution capacitance dilatometer

The great advantage of the new type of measuring cells is based on a unique combination of powerful design, production technology and high level of manufacturing quality.

Size and Dimensions
footprint: 14 mm × 15 mm; height: 16 mm; weight: 13 g

Absolute resolution
@ low Temperature (Kelvinox-Systems (0.01 K up to 6 K)): ΔL = 0.01 Å
@ PPMS ΔL = 0.01 Å

Range of operation
Temperature range: 10 mK < T < 320 K
Magnetic field range: At least up to 38 T (max. tested field)

Measurable sample size
footprint (max.): (2.3 mm × 6 mm) or Ø = 3.3 mm
height: Less than 1 mm up to 2.75 mm

Materials
Dilatometer-parts: copper beryllium
Insulating pieces; washers: vespel; sapphire

Options
Any Cryostat: Dilatometer + attachments
PPMS: Dilatometer (can be rotated) complete with PPMS-probe and cables + software

Standard-Dilatometer
Compact and miniaturized high resolution capacitance dilatometer

Innovative patent-pending production method allows for an unprecedented resolution in a dilatometer of this compact size.




Size and Dimensions
footprin: 20 mm × 26 mm; height: 34 mm; weight 45 g

Absolute resolution
@ low Temperature (Kelvinox-Systems (0.01 K up to 6 K)): ΔL = 0.02 Å
@ PPMS ΔL = 0.01 Å

Range of operation
Temperature range: 10 mK < T < 320 K
Magnetic field range: At least up to 30 T (max. tested field)

Measurable sample size
footprint (max.): (3.5 mm × 10 mm) or Ø = 5 mm
height: Less than 1 mm up to 5 mm

Materials
Dilatometer-parts: copper beryllium
Insulating pieces; washers: vespel; sapphire

Options
Any Cryostat: Dilatometer + attachments
PPMS: Dilatometer complete with PPMS-probe and cables + software

Stress-Dilatometer
Uniaxial stress capacitance dilatometer for high-resolution thermal expansion and magnetostriction

Size and Dimensions
footprin: 20 mm × 26 mm;; height: 41 mm; weight 52 g

Absolute resolution
@ low Temperature (Kelvinox-Systems (0.01 K up to 6 K)): ΔL = 0.02 Å
@ PPMS ΔL = 0.01 Å

Range of operation
Temperature range: 10 mK < T < 320 K
Magnetic field range: At least up to 30 T (max. tested field)
Applied force: from 40 up to 75 N
max. uniaxial stress: 3 kbar for cuboid sample of (0.5 mm)2 cross section

Measurable sample size
footprint (max.): (3.5 mm × 10 mm) or Ø = 5 mm
height: Less than 1 mm up to 5 mm

Materials
Dilatometer-parts: copper beryllium
Insulating pieces; washers: vespel; sapphire

Options
Varity of Cryostats: Stress-dilatometer + attachments
PPMS: Dilatometer complete with PPMS-probe and cables + software

Working environment

Our dilatometers can be used in a wide range of temperature. They were tested and operated down to extremely low temperature (10 mK). The maximal operation temperature is determined by the thermal capability of the insulating pieces of vespel and the used coaxial cables. So far, dilatometers were only tested at temperatures just above room temperature. To achieve the best possible results the dilatometers have to be operated in a steady flowing inert gas atmosphere, where the dielectric constant of the medium does not change with temperature (e.g. helium, nitrogen, clean and dry air, vacuum). The operation in flow cryostats or directly in cryogenic liquids (helium) is not recommended. Our dilatometers have been successfully operated in most commonly measurement systems, e.g. in the Quantum Design PPMS under helium atmosphere or in an Oxford Instruments Kelvinox dilution refrigerator under vacuum. For all these systems, we offer the matching accessories for suitable mounting.

Selected Applications
1. PPMS (Physical Property Measurement System by Quantum Design)
2. Kelvinox™ Dilution Refrigerator by Oxford Instruments
3. Exchange Gas cryostat

In-situ PPMS-Dilatometry probe - Key Features

Sample Space Parameters: samples up to 2.75 mm can be measured
Operational Range: 1.8 to 350 K, 0 to 16 T
Possible Resolution: 0.01 × 10-10 m
Manual In-situ rotation (rotation axis normal to the direction of applied field) of the sample within the cell between -90° and +90° inside of the PPMS enables systematic anisotropy studies.


The change in length of a 1 mm large NbP single crystal at 2 K is shown as a function of applied magnetic field; quantum oscillations in the length change due to the de Haas-van Alphen effect can clearly be seen. The field was swept in a DynaCool System with 10 Oe/sec.

Site Notice

Dr. Robert Kuechler
Frankenstraße 13
01309 Dresden (Germany)

Fon: +49 (0) 351 46 46 31 27
Fax: +49 (0) 351 46 46 31 26
E-mail: kuechler@dilatometer.info
VAT Number (USt.-IdNr.): DE285812663


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One of the organizers, Dr. Jeroen Custers and Dr. Franziska Weickert from Los Alamos National Laboratory discuss the benefits of dilatometry in Prague.

In the session "Novel techniques for SCES investigation" I introduced our patented dilatometry design and new applications in space lacking devices in my talk entitled "Ultra-high resolution capacitive dilatometry under extreme conditions"