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  • Title: de Haas-van Alphen effect in ZrZn2 under pressure: crossover between two magnetic states.
    Author: Kimura N, Endo M, Isshiki T, Minagawa S, Ochiai A, Aoki H, Terashima T, Uji S, Matsumoto T, Lonzarich GG.
    Journal: Phys Rev Lett; 2004 May 14; 92(19):197002. PubMed ID: 15169437.
    Abstract:
    We report measurements of the de Haas-van Alphen effect in ZrZn2 under hydrostatic pressures up to 21 kbar where the Curie temperature vanishes. The exchange splitting of a Fermi surface changes in behavior with increasing magnetic field, which is qualitatively consistent with the behavior of the high-field magnetization, suggesting the existence of a crossover between two distinct magnetic states. These and previously unexplained findings may be understood in terms of a p-T-B phase diagram qualitatively similar to that of the ferromagnetic superconductor UGe2.
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