Magnetovolume Effects in Strongly Correlated Plutonium Phases


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Abstract

Thermodynamic spin fluctuations in strongly correlated plutonium (Pu) phases with exchange and spin–orbit interactions are considered. In α- and δ-Pu phases, the spin fluctuations lead to a negative magnetovolume effect that is determined by the parameter of intermode coupling and depends on features of the electron structure. It is shown that the negative volumetric thermal expansion coefficient of δ-Pu is related to an anomalously strong interaction of spin fluctuation modes.

About the authors

A. A. Povzner

Ural Federal University

Author for correspondence.
Email: a.a.povzner@urfu.ru
Russian Federation, Yekaterinburg, 620002

A. G. Volkov

Ural Federal University

Email: a.a.povzner@urfu.ru
Russian Federation, Yekaterinburg, 620002

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