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THE CC33 OPTICAL NONMAGNETIC PRESSURE CELL

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The CC33 nonmagnetic pressure cell. 1 - Body, 2 - Piston, 3 - Obturator, 4 - Screw for piston, 5 - Screw for obturator, 6 – Push rod.

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Assembled CC33 high pressure cell and set of ancillary items. 1 - Assembled CC33 cell, 2 - Loading support ("glass"), 3 - Obturator extractor, 4 - Piston extractor, 5 - Vice - gripping device, 6 - Piston for "squeeze out"

The CC33 optical cell is designed for magnetooptical (magnetoluminescence, cyclotron resonance, Raman scattering) and magnetotransport (resistance, magnetoresistance, quantum Hall effects) investigations of semiconductors, superconductors and other solid and liquid samples under hydrostatic pressures up to 3.0 GPa at temperatures 0.05-400K in magnetic field up to 50 Tesla.

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  The CC33 is made of nonmagnetic materials. The cell is equipped with obturator for magnetotransport measurements and the combined opturator with sapphire window and electrical leads. Two new methods for sealing of an optical window[1] give the cell capability to operate without failure of the window even at the highest pressure 2.5 GPa. Pressure is generated at room temperature by the application of a load to the pusher with a hydraulic press and then fixed by means of the locking nut. Then cell can be handled and placed in various measurement set up - magnet, cryostat etc. Pressure is measured by manganin resistance gauge and can be measured by any type of commercially available semiconductor pressure gauges.

Technical characteristics :

Pressure range  
Temperature range
Pressure volume
Outer diameter of the cell  
Inner diameter of the insert
Inner diameter of the teflon tube
Length 
Weight 

  

3.0 GPa
0.03-400 K
5.5*5 mm3
33 mm
6.5 mm
5.5 mm
95 mm
0.55 kg

Materials: nonmagnetic NiCrAl alloy, CuBe, WC

This cell was successfully used for measurements of the luminescence and electro luminescence in semiconductor lasers under hydrostatic pressure

We have performed Bc2 measurements of polycrystalline Nb3Sn samples in the Nijmegen Hybrid Magnet for fields up to 25 Tesla[2].

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Recently this cell was used successfully in measurements of collective spin excitations in two-dimensional electron gas. Measurements of the integer and fractional quantum Hall effects energy gaps at pressures up to 24 kbar, with in situ illumination of the sample, provided evidence for the existence of Skyrmions and composite Skyrmions[3,4].

 

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Measurements for sample G586 between 50 mK and 1.3K. At pressure 13 kbar.

  1. M.I.Eremets, A.N.Utjuzh. Optical Nonmagnetic Low-Temperature Hydrostatic Pressure Cells up to 3 GPa. Proceedings of Joint AIRAPT/APS Conference on High Pressure Science and Technology, June 28-July 2, 1993 Colorado Sprins, USA. AIP 1994, p.1597-1600

  2. A.N.Utjuzh, J.A.A.J.Perenboom, B.ten Haken H.H.ten Kate. The Upper Critical Field of Nb3Sn under hydrostatic pressure. Russian Academy of Sciences, Institute of High Pressure Physics, Yearbook 1995 v.3, p.47, Moskow (1997).

  3. D.R. Leadley, R.J. Nicholas, D.K. Maude, A.H. Utjuzh, J.C. Portal, J.J. Harris and C.T. Foxon. Fractional Quantum Hall Effect Measurements at Zero g-Factor; Physical Review Letters v 79, N 21 November 24, p.4246-4249. (1997).

  4. Leadley D.R., Nicholas R.J., Maude D.K., Utjuzh A.N., Portal J.C., Harris J.J., Foxon C.T. Searches for Skyrmions in the limit of Zero g-Factor. Semiconductor Science and Technology. v.13, p.671-679, (1998).

 

Our experience enables us to offer our help in various investigation and measurement problems.

Contact person: Dr. Valentin Ryzhov. E-mail: ryzhov@hppi.troitsk.ru

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