Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 4: Spin structures and magnetic phase transitions
MA 4.7: Vortrag
Montag, 12. März 2018, 11:00–11:15, EB 202
Magnetism and H-T phase diagram of the C14 Laves phase Nb0.075Fe2.025 compound — •Stanislaw Dubiel1 and Maria Balanda2 — 1AGH University of Science and Technology, Krakow, Poland — 2Institute of Nuclear Physics, PAN, Krakow, Poland
A C14 Nb0.975Fe2.025 Laves phase compound was investigated aimed at determining the H-T magnetic phase diagram. Magnetization, M, and AC magnetic susceptibility measurements were performed. Concerning the former field-cooled and zero-field-cooled M-curves were recorded in the temperature range of 2-200K and in applied magnetic field, H, up to 1000 Oe, isothermal M(H) curves at 2 K, 5 K, 50 K, 80 K and 110 K as well as hysteresis loops at several temperatures over the field range from -10 to +10kOe. Regarding the AC susceptibility, both real and imaginary components were registered as a function of increasing temperature in the interval of 2 K - 150 K at the frequencies of the oscillating field from 3 Hz up to 999 Hz. An influence of an external DC magnetic field, H, on the temperature dependence of the AC suscpetibility was investigated, too. The measurements clearly demonstrated that the magnetism of the studied sample is weak, itinerant and has a reentrant character which is a novel observation. Based on the obtained results a magnetic phase diagram has been constructed in the H-T coordinates. The results have been validated in terms of the known models for the reentrant spin glasses.