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Cryogenic magnetocaloric effect in the Fe17 molecular nanomagnet.

Number: pap. ID: 233

Author(s) : GASS I. A., BRECHIN E. K., EVANGELISTI M.

Summary

We study the magnetic and magnetothermal properties of a magnetically isotropic high-spin molecular nanomagnet containing 17 Fe3+ ions per molecule linked via oxide and hydroxide ions. Low-temperature magnetization and heat capacity experiments reveal that each molecular unit carries a net spin ground state as large as S = 35/2 and a magnetic anisotropy as small as D = -0.023 K. These characteristics result in a large magnetocaloric effect in the liquid-helium temperature range, e.g. -delta Sm up to 8.9 J kg-1 K-1 for a 7 T applied-field change, suggesting that the Fe17 molecular nanomagnet can potentially be employed as a lowtemperature magnetic refrigerant.

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Pages: 7 p.

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Details

  • Original title: Cryogenic magnetocaloric effect in the Fe17 molecular nanomagnet.
  • Record ID : 30002315
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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