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Large Electrocaloric Effect from Electrical Field Induced Orientational Order-Disorder Transition in Nematic Liquid Crystals Possessing Large Dielectric Anisotropy

Published online by Cambridge University Press:  13 May 2013

Xiao-Shi Qian ,
S. G. Lu ,
Xinyu Li ,
Haiming Gu ,
L-C Chien  and
Q. M. Zhang
Xiao-Shi Qian
Affiliation:
Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
S. G. Lu
Affiliation:
Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
Xinyu Li
Affiliation:
Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
Haiming Gu
Affiliation:
Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
L-C Chien
Affiliation:
Liquid Crystal Institute and Department of Chemical Physics, Kent State University, Kent, OH 44242, USA
Q. M. Zhang
Affiliation:
Department of Electrical Engineering and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA
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Abstract

Large electrocaloric (EC) effects in ferroelectric polymers and in ferroelectric ceramics have attracted great attention for new refrigeration development which is more environmental friendly and more efficient and thus could be an alternative to the existing vapor-compression refrigerators which consume large energy and release large amount of green house gas. However in the past, all EC effects investigations have been focused on solid state dielectrics. It is interesting to ask whether a large EC effect can also be realized in dielectric fluids. A dielectric fluid with large EC effect could lead to new design of cooling devices with simpler structures than these based on solid state EC materials, for example, they can be utilized as both the refrigerant and heat exchange fluid. Here we present that a large EC effect can be realized in the liquid crystal (LC) 5CB near it's nematic-isotropic (N-I) phase transition. The LC 5CB possesses a large dielectric anisotropy which can induce large polarization change from the isotropic phase to the nematic phase near the N-I transition. An isothermal entropy change of more than 23 Jkg-1K-1 was observed near 39 oC that is just above the N-I transition.

Keywords

liquid crystalelectrical propertiesdielectric properties
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1543: Symposium I – Nanoscale Thermoelectric Materials, Transport Phenomena, and Applications to Solid-State Cooling and Power Generation , 2013 , pp. 13 - 20
Copyright
Copyright © Materials Research Society 2013 

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References

REFERENCES

Lines, M. & Glass, A. Principles and Applications of Ferroelectrics and Related Materials. (Larendon Press, Oxford, 1977).Google Scholar
Fatuzzo, E. and Merz, W. J., Ferroelectricity (North-Holland, Amsterdam, 1967).Google Scholar
Mischenko, A. S., Zhang, Q., Scott, J. F., Whatmore, R. W., and Mathur, N. D., Science 311, 1270 (2006).CrossRefGoogle Scholar
Neese, B., Chu, B., Lu, S. G., Wang, Y., Furman, E., and Zhang, Q. M., Science 321, 821 (2008).CrossRefGoogle Scholar
Lu, S. G. and Zhang, Q. M., Adv. Mater. 21, 1983 (2009).CrossRefGoogle Scholar
Correia, T. M. et al. . Appl. Phys. Lett. 95, 182904 (2009).CrossRefGoogle Scholar
Lu, S. G., Rožič, B., Zhang, Q. M., Kutnjak, Z., Li, X., Furman, E., Gorny, Lee J., Lin, M. R., Malič, B., Kosec, M., Blinc, R., Pirc, R., Appl. Phys. Lett. 97, 162904 (2010).CrossRefGoogle Scholar
Li, X., Qian, X. S., Lu, S. G., Cheng, J. P., Fang, Z., Zhang, Q. M., Appl. Phys. Lett. 99, 052907 (2011).CrossRefGoogle Scholar
Liu, Z. K., Li, Xinyu, and Zhang, Q. M., Appl. Phys. Lett. 101, 082904, (2012).CrossRefGoogle Scholar
Liu, L., Liu, Y., Leng, J., Appl. Phys. Lett. 99, 181908, (2011).CrossRefGoogle Scholar
Akcay, G., Alpay, S. P., Mantese, J., Rossetti, G. A. Jr, Appl. Phys. Lett. 90, 252909, (2007).CrossRefGoogle Scholar
Li, X., Qian, X.-S, Gu, H., Chen, X.-Z, Lu, S. G., Lin, Minren, Bateman, Fred, and Zhang, Q. M.. Appl. Phys. Lett. 101, 132903 (2012).CrossRefGoogle Scholar
Chen, X.-Z., Qian, X.-S, Li, X., Lu, S.G., Gu, H., Lin, M., Shen, Q.-D., and Zhang, Q. M.. Appl. Phys. Lett. 100. 222902, (2012).CrossRefGoogle Scholar
Kar-Narayan, S., Crossley, S., Moya, X., Kovacova, V., Abergel, J., Bontempi, A., Baier, N., Defay, E. and Mathur, N. D.. Appl. Phys. Lett. 102, 032903 (2013).CrossRefGoogle Scholar
Rose, M. C. and Cohen, R. E.. Phys. Rev. Lett. 109, 187604 (2012).CrossRefGoogle Scholar
Bai, Y., Zheng, G.-P., Ding, K., Qiao, L., Shi, S.-Q., and Guo, D.. J. Appl. Phys. 110, 094103 (2011).Google Scholar
Jia, Y. and Ju, Y. S.. Appl. Phys. Lett. 100, 242901 (2012).CrossRefGoogle Scholar
Kar-Narayan, S., Mathur, N. D.. Ferroelectrics (0015-0193), 433(1), 107, (2012).CrossRefGoogle Scholar
Sinyashii, Y. V., Chem. & Petro. Eng. 31, 501 (1995).Google Scholar
Sinyavsky, Y. V., Lugansky, G. E., Pashkov, N. D., Cryogenics, 32, 28, (1992).CrossRefGoogle Scholar
De Gennes, P. G. & Prost, J., The Physics of Liquid Crystals (2 nd edit. Clarendon Press, Oxford, 1995).CrossRefGoogle Scholar
Blinov, L. M. and Chigrinov, V. G., Electrooptic Effect in Liquid Crystal Materials (Springer, NY, 1996).Google Scholar
Lehmann, W. et al. ., Nature 410, 447 (2001).CrossRefGoogle Scholar
Abe, K., USami, A., Ishida, K., Fukushima, Y., and Shigenari, T., J. Korean Phys. Soc. 46, 220 (2005).Google Scholar
Coles, H. J., Mol. Cryst. Liq. Cryst. Lett. 49, 67 (1978).CrossRefGoogle Scholar
Lelidis, I. and Durand, G., Phys. Rev. E48, 3822 (1993).Google Scholar
Crawford, G. P., Ondris-Crawford, R., Zumer, S., and Doane, J. W., Phys. Rev. Lett. 70, 1838 (1993).CrossRefGoogle Scholar
Bechhoefer, J. et al. ., Phys. Rev. Lett. 64, 1911 (1990).CrossRefGoogle Scholar
Patel, J. S. and Yokoyama, H., Nature 362, 525 (1993).CrossRefGoogle Scholar
Demus, D., Goodby, J., Gray, G. W., Spiess, H. -W., Vill, V., Handbook of Liquid Crystals (Wiley-VCH, Weinheim 1998).Google Scholar
Yang, D.-K, Yin, Y., and Liu, H., Liq. Cryst. 34, 605 (2007).CrossRefGoogle Scholar
Tishin, A. M. and Spichkin, Y. I., The Magnetocaloric Effect and Its Applications (IOP Publishing Ltd, Bristol 2003).CrossRefGoogle Scholar