Magnetic ordering and features of its coexistence with superconductivity in Dy0.6Y0.4Rh3.85Ru0.15B4
А.V. Terekhov1,2, I.V. Zolochevskii1, L.A. Ischenko1, A.N. Bludov1, A. Zaleski2, E.P. Khlybov3, and S.A. Lachenkov4
1B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 47 Nauki Ave., Kharkiv 61103, Ukraine
2W. Trzebiatowski Institute for Low Temperatures and Structure Research PAS Okolna, 2 Box 1410, 50-950, Wroclaw, Poland
3L.F. Vereshchagin Institute for High-Pressure Physics, RAN, Troitsk 142190, Russia
4Институт металлургии и металловедения им. А.А. Байкова РАН Ленинский пр., 49, г. Москва, 119991, Россия
Received June 7, 2019, published online October 25, 2019
For the first time the temperature dependence of the dynamic magnetic susceptibility of magnetic superconductor Dy0.6Y0.4Rh3.85Ru0.15B4 in the temperature range 2–50 K, as well as the field dependence of magnetization up to 6 T at fixed temperatures of 2, 11, 18, and 50 K have been studied. It was found that at ТFM = (21 ± 1) K a transition to the ferromagnetic state takes place and at Тc = (6.7 ± 1) K a transition to the superconducting state is observed, which coexists with the ferromagnetic phase in a wide temperature range of 2–6.7 K. It is suggested that a triplet mechanism of superconducting pairing is possible presented for Dy0.6Y0.4Rh3.85Ru0.15B4.