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This article is cited in 1 scientific paper (total in 1 paper)
Metals
Magnetic susceptibility and spin fluctuations in the nonsuperconducting phase of PuCoGa$_{5}$
A. G. Volkov, A. A. Povzner Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg
Abstract:
Within the Hubbard model with allowance for Hund's and spin–orbit interactions, the concepts of thermal spin fluctuations in a strongly correlated system of $f$ electrons in PuCoGa$_5$ are developed. The effect of fluctuations of the spin magnetic moments of different orbitals on the spin–orbit splitting of the $f$ electron spectrum is considered. The mean square magnetic moment obtained in this case makes it possible to describe the observed temperature dependence of the magnetic susceptibility $(\chi(T))$ of PuCoGa$_5$ near and above the electron pairing temperature. Estimates of the radius of spin correlations correspond in order of magnitude to the sizes of Cooper pairs in superconductors with the $d$ symmetry of the order parameter. In the high-temperature region, the magnetic susceptibility obeys the Curie–Weiss law. With decreasing temperature, when approaching the pairing temperature, the ferromagnetic instability is suppressed and the temperature maximum of $\chi(T)$ appears.
Received: 27.12.2017 Revised: 23.05.2018
Citation:
A. G. Volkov, A. A. Povzner, “Magnetic susceptibility and spin fluctuations in the nonsuperconducting phase of PuCoGa$_{5}$”, Fizika Tverdogo Tela, 60:12 (2018), 2306–2310; Phys. Solid State, 60:12 (2018), 2344–2348
Linking options:
https://www.mathnet.ru/eng/ftt8965 https://www.mathnet.ru/eng/ftt/v60/i12/p2306
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