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Magnetism

A delicate balance of phonons and spins

Nature Physics volume 19, pages 1547–1548 (2023)Cite this article

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The near-zero thermal expansion of Invar alloy Fe65Ni35 is technologically important but still unexplained. Measurements show that this phenomenon can be explained by the cancellation of magnetic and phonon contributions to the alloy’s entropy.

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Fig. 1: Experimental scheme to explore the origin of the Invar effect.

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Authors and Affiliations

  1. Helmholtz Institute Jena, Jena, Germany

    Ralf Röhlsberger

  2. GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany

    Ralf Röhlsberger

  3. Friedrich-Schiller Universität Jena, Jena, Germany

    Ralf Röhlsberger

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  1. Ralf Röhlsberger
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Correspondence to Ralf Röhlsberger.

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Röhlsberger, R. A delicate balance of phonons and spins. Nat. Phys. 19, 1547–1548 (2023). https://doi.org/10.1038/s41567-023-02152-x

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