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Elastocaloric, barocaloric and magnetocaloric effects in spin crossover polymer composite films

Author

Listed:
  • Klara Lünser

    (Universitat de Barcelona)

  • Eyüp Kavak

    (Ankara University
    Ankara University)

  • Kübra Gürpinar

    (Ankara University
    Ankara University)

  • Baris Emre

    (Ankara University)

  • Orhan Atakol

    (Ankara University)

  • Enric Stern-Taulats

    (Universitat de Barcelona)

  • Marcel Porta

    (Universitat de Barcelona)

  • Antoni Planes

    (Universitat de Barcelona)

  • Pol Lloveras

    (Universitat Politècnica de Catalunya)

  • Josep-Lluís Tamarit

    (Universitat Politècnica de Catalunya)

  • Lluís Mañosa

    (Universitat de Barcelona)

Abstract

Giant barocaloric effects were recently reported for spin-crossover materials. The volume change in these materials suggests that the transition can be influenced by uniaxial stress, and give rise to giant elastocaloric properties. However, no measurements of the elastocaloric properties in these compounds have been reported so far. Here, we demonstrated the existence of elastocaloric effects associated with the spin-crossover transition. We dissolved particles of ([Fe(L)2](BF4)2, [L=2,6di(pyrazol-1-yl)pyridine]) into a polymeric matrix. We showed that the application of tensile uniaxial stress to a composite film resulted in a significant elastocaloric effect. The elastocaloric effect in this compound required lower applied stress than for other prototype elastocaloric materials. Additionally, this phenomenon occurred for low values of strain, leading to coefficient of performance of the material being one order of magnitude larger than that of other elastocaloric materials. We believe that spin-crossover materials are a good alternative to be implemented in eco-friendly refrigerators based on elastocaloric effects.

Suggested Citation

  • Klara Lünser & Eyüp Kavak & Kübra Gürpinar & Baris Emre & Orhan Atakol & Enric Stern-Taulats & Marcel Porta & Antoni Planes & Pol Lloveras & Josep-Lluís Tamarit & Lluís Mañosa, 2024. "Elastocaloric, barocaloric and magnetocaloric effects in spin crossover polymer composite films," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50373-2
    DOI: 10.1038/s41467-024-50373-2
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    References listed on IDEAS

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    1. Bing Li & Yukinobu Kawakita & Seiko Ohira-Kawamura & Takeshi Sugahara & Hui Wang & Jingfan Wang & Yanna Chen & Saori I. Kawaguchi & Shogo Kawaguchi & Koji Ohara & Kuo Li & Dehong Yu & Richard Mole & T, 2019. "Colossal barocaloric effects in plastic crystals," Nature, Nature, vol. 567(7749), pages 506-510, March.
    2. Shixian Zhang & Quanling Yang & Chenjian Li & Yuheng Fu & Huaqing Zhang & Zhiwei Ye & Xingnan Zhou & Qi Li & Tao Wang & Shan Wang & Wenqing Zhang & Chuanxi Xiong & Qing Wang, 2022. "Solid-state cooling by elastocaloric polymer with uniform chain-lengths," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    3. P. Lloveras & A. Aznar & M. Barrio & Ph. Negrier & C. Popescu & A. Planes & L. Mañosa & E. Stern-Taulats & A. Avramenko & N. D. Mathur & X. Moya & J.-Ll. Tamarit, 2019. "Colossal barocaloric effects near room temperature in plastic crystals of neopentylglycol," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
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