Magnetocaloric effect in spin-degenerated molecular nanomagnets

M. Evangelisti; A. Candini; M. Affronte; E. Pasca; L. J. de Jongh; R. T. W. Scott; E. K. Brechin

doi:10.1103/PhysRevB.79.104414

Magnetocaloric effect in spin-degenerated molecular nanomagnets

M. Evangelisti, A. Candini, M. Affronte, E. Pasca, L. J. de Jongh, R. T. W. Scott, E. K. Brechin

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

For molecular nanomagnets, excesses of magnetic entropy at finite low temperatures are induced by degrees of freedom resulting from macroscopic degeneracies of the molecular spin states. We experimentally demonstrate that this effect can be huge and efficiently exploited for enhancing the magnetic field dependence of the adiabatic temperature change. We specifically consider the Mn-32 molecular nanomagnet, proving it to be an excellent magnetic refrigerant below T approximate to 2 K, due almost entirely to its spin degeneracy.

Original language	English
Article number	104414
Pages (from-to)	-
Number of pages	5
Journal	Physical review B
Volume	79
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.79.104414
Publication status	Published - Mar 2009

Keywords / Materials (for Non-textual outputs)

entropy
magnetic cooling
manganese
molecular magnetism
nanomagnetics
nanostructured materials
spin dynamics
MAGNETIC REFRIGERATION
CLUSTERS

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10.1103/PhysRevB.79.104414

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http://prb.aps.org/abstract/PRB/v79/i10/e104414

Cite this

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abstract = "For molecular nanomagnets, excesses of magnetic entropy at finite low temperatures are induced by degrees of freedom resulting from macroscopic degeneracies of the molecular spin states. We experimentally demonstrate that this effect can be huge and efficiently exploited for enhancing the magnetic field dependence of the adiabatic temperature change. We specifically consider the Mn-32 molecular nanomagnet, proving it to be an excellent magnetic refrigerant below T approximate to 2 K, due almost entirely to its spin degeneracy.",

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AU - Affronte, M.

AU - Pasca, E.

AU - de Jongh, L. J.

AU - Scott, R. T. W.

AU - Brechin, E. K.

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KW - nanostructured materials

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Magnetocaloric effect in spin-degenerated molecular nanomagnets

Abstract / Description of output

Keywords / Materials (for Non-textual outputs)

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