[en] Short communication

[en] Magnetisation measurements have been performed on a single crystal of ytterbium iron garnet (Yb₃Fe₅O₁₂ or YbIG) with dc magnetic fields up to 16 T applied along the left angle 110 right angle direction at temperatures up to 50 K. The magnetic phase transitions, between the different so called canted and collinear phases, have been observed. The position of the lines of the phase diagram together with the nature of the corresponding transitions have been precisely determined. In particular the line separating the two canted phases is found to be of first order with a characteristic jump in the magnetisation which tend to vanish only at the highest fields. These results are compared with previous studies in higher pulsed fields and recent ac susceptibility measurements in fields lower than 4 T, together with the theoretical predictions. (orig.)

No abstract available

No abstract available

No abstract available

[en] The results of the investigation of the longitudinal Procopiu effect on permalloy films with circular anisotropy are reported. The oscillatory structure of the signals was explained by a possible dispersion of the easy magnetic axes. (author)

No abstract available

No abstract available

[en] Short communication

[en] Magnetization measurements on a 2H-NbSe₂ sample were performed in terms of temperature down to 1.7 K and for different values of the applied magnetic field.The magnetic field was imposed both along and parallel to the conducting planes. Measurements for the parallel position were not successful, Although for the perpendicular position the obtained results are of the same range comparable with those published in the literature, mainly the critical field and the vortices pinning.(author)