Landau Theory of Barocaloric Plastic Crystals

Autor: Marín-Delgado, R., Moya, X., Guzmán-Verri, G. G.

Publikováno v: J. Phys. Energy 6 035003 (2024)

We present a minimal Landau theory of plastic-to-crystal phase transitions in which the key components are a multipole-moment order parameter that describes the orientational ordering of the constituent molecules, coupling between such order paramete

Externí odkaz: http://arxiv.org/abs/2309.02316

Quasi-indirect measurement of electrocaloric temperature change in PbSc0.5Ta0.5O3 via comparison of adiabatic and isothermal electrical polarization data

Autor: Crossley, S., Whatmore, R. W., Mathur, N. D., Moya, X.

Publikováno v: APL Materials 9, 010701 (2021)

Electrically driven adiabatic changes of temperature are identified in the archetypal electrocaloric material PbSc0.5Ta0.5O3 by comparing isothermal changes of electrical polarization due to slow variation of electric field, and adiabatic changes of

Externí odkaz: http://arxiv.org/abs/2010.15400

Electrocaloric cooling cycles in lead scandium tantalate with true regeneration via field variation

Autor: Crossley, S., Nair, B., Whatmore, R. W., Moya, X., Mathur, N. D.

Publikováno v: Phys. Rev. X 9, 041002 (2019)

There is growing interest in heat pumps based on materials that show thermal changes when phase transitions are driven by changes of electric, magnetic or stress field. Importantly, regeneration permits sinks and loads to be thermally separated by ma

Externí odkaz: http://arxiv.org/abs/1907.06640

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Highly reversible extrinsic electrocaloric effects over a wide temperature range in epitaxially strained SrTiO 3 films.

Autor: Zhang S; College of Science, National University of Defense Technology, Changsha, China. zhangsen@nudt.edu.cn.; Department of Materials Science, University of Cambridge, Cambridge, UK. zhangsen@nudt.edu.cn., Deliyore-Ramírez J; Centro de Investigación en Ciencia e Ingeniería de Materiales (CICIMA), Universidad de Costa Rica, San José, Costa Rica.; Escuela de Física, Universidad de Costa Rica, San José, Costa Rica., Deng S; Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, China., Nair B; Department of Materials Science, University of Cambridge, Cambridge, UK., Pesquera D; Department of Materials Science, University of Cambridge, Cambridge, UK., Jing Q; Department of Materials Science, University of Cambridge, Cambridge, UK.; James Watt School of Engineering, University of Glasgow, Glasgow, UK., Vickers ME; Department of Materials Science, University of Cambridge, Cambridge, UK., Crossley S; Department of Materials Science, University of Cambridge, Cambridge, UK., Ghidini M; Department of Materials Science, University of Cambridge, Cambridge, UK.; DiFeST, University of Parma, Parma, Italy.; Diamond Light Source, Chilton, Didcot, UK., Guzmán-Verri GG; Department of Materials Science, University of Cambridge, Cambridge, UK. gian.guzman@ucr.ac.cr.; Centro de Investigación en Ciencia e Ingeniería de Materiales (CICIMA), Universidad de Costa Rica, San José, Costa Rica. gian.guzman@ucr.ac.cr.; Escuela de Física, Universidad de Costa Rica, San José, Costa Rica. gian.guzman@ucr.ac.cr., Moya X; Department of Materials Science, University of Cambridge, Cambridge, UK. xm212@cam.ac.uk., Mathur ND; Department of Materials Science, University of Cambridge, Cambridge, UK. ndm12@cam.ac.uk.

Publikováno v: Nature materials [Nat Mater] 2024 May; Vol. 23 (5), pp. 639-647. Date of Electronic Publication: 2024 Mar 21.