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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.5 P.793-796


Simple operated multipurpose temperature control cryostat

Author(s):  ABBAS T.A., OMAR M.S.

Affiliation(s):  Department of Physics, College of Science University of Salahaddin, Arbil, Iraqi Kurdistan, Iraq

Corresponding email(s):   dr_m_s_omar@yahoo.com

Key Words:  Optical cryostat, Electrical cryostat, Magneto-optical cryostat

ABBAS T.A., OMAR M.S.. Simple operated multipurpose temperature control cryostat[J]. Journal of Zhejiang University Science A, 2007, 8(5): 793-796.

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A suitable simple optical cryostat for optical, magneto-optical, electrical and thermo-electrical measurements was designed. It is suitable for use in a magnetic pool gap as narrow as less than 1 cm. Throughout a long period of time, the heat diffusion process of the cryostat can be easily operated at slow increase in sample temperature in a range 1.25 K/min at 200 K that will be reduced gradually to 0.66 K at room temperature. Liquid nitrogen was used to cool down the temperature. During the operation, the change in the measured energy gap of a semiconductor sample and other physical parameters resulting from the change of temperature can be corrected through the temperature coefficient of that parameter at the corresponding temperature. The cryostat was successfully used for all experiments mentioned above to measure the properties of a single crystal of GaP (Gallium Phosphate) semiconductor.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


[1] Abbas, T.A., 2005. Physical Properties of N-type GaP Single Crystal Semiconductor Compound. Ph.D thesis, College of Science, University of Salahaddin, Kurdistan, Iraq.

[2] Andrews, S.S., Boxer, S.G., 2000. A liquid nitrogen immersion cryostat for optical measurements. Rev. Sci. Inst., 71(9):3567.

[3] Camassel, J., Auverge, D., 1975. Temperature dependence of the fundamental edge of germanium and zinc-blend type semiconductors. Phys. Rev. B, 12(8):3258.

[4] Hernández, E., López Pescador, A., Durante Rincón, C.A., León, M., 2002. Electrical properties of CuIn3Se5 bulk crystals at low temperature. Cryst. Res. Technol., 37(10):1088-1093.

[5] Pathinettam Padiyan, D., John Ethilton, S., Paulraj, K., 2000. Protonic conductivity and photoconductivity studies on H3PW12O4021H2O single crystals. Cryst. Res. Technol., 35(1):87-94.

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