Heavy quasiparticles in the ferromagnetic superconductor ZrZn2

Abstract

We report a study of the de Haas-van Alphen effect in the normal state of the ferromagnetic superconductor ZrZn2. Our results are generally consistent with an LMTO band structure calculation which predicts four exchange-split Fermi surface sheets. Quasiparticle effective masses are enhanced by a factor of about 4.9 implying a strong coupling to magnetic excitations or phonons. Our measurements provide insight in to the mechanism for superconductivity and unusual thermodynamic properties of ZrZn2.

5 pages, 2 figures (one color)

References in corpus (2)

• Competition of Spin-Fluctuations and Phonons in Superconductivity of ZrZn2
• Longitudinal spin-fluctuations and superconductivity in ferromagnetic ZrZn${}_2$ from ab initio calculations

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• Competition between disorder and exchange splitting in superconducting ZrZn_2
• Hyperfine field assessment of the magnetic structure of ZrZn2
• Low-Energy Electrodynamics of Heavy Quasiparticles in ZrZn2