[en] The results of measurements and analysis of initial magnetic susceptibility and specific heat of intermetallic R₃Ni (R=heavy rare earth or Y) are presented. The comparative analysis allowed us to determine origin of magnetic anomalies as well as to define their temperatures more precisely. It is shown that strong short-range magnetic ordering remains above T_N. The effect of spin freezing have been found in almost all investigated R₃Ni. The specific splitting of the ground level multiplet leads to rather unusual magnetic entropy behavior in some of R₃Ni compounds

[en] The results of magnetization measurements of a Dy₃Ni single crystal are presented. A sharp jump of magnetization is observed along a- and c-axis, whereas the magnetization along the b-axis increases gradually. Lack of saturation, strong anisotropy and relatively low values of the magnetic moments observed in magnetic fields up to 35 T are caused by non-collinear magnetic structure that remains even in strong magnetic fields. A magnetic phase diagram with the magnetic field applied along the main crystallographic axes is presented

[en] The investigations and comparative analysis of the magnetization processes for Gd₃Ni and Gd₃Co single-crystal compounds are presented. The possible magnetic structures for both compounds are proposed and the features of the field-induced metamagnetic transitions are discussed on the basis of the possible magnetic structures. The anomalous behavior of the Gd₃Ni compound observed above the magnetic ordering temperature is very likely caused by the appearance of the nickel atoms magnetic moment and field-induced magnetic ordering

[en] The investigations of magnetization processes for Er₃Ni and Er₃Co single crystal compounds are presented. The magnetization processes are discussed on the basis of magnetic structures determined previously by neutron diffraction for both compounds. It is shown that both ferromagnetic and antiferromagnetic exchange interactions as well as strong local ionic anisotropy of erbium atoms play a significant role in the magnetization processes forming

[en] Specific heat measurements have been performed on the isostructural R₃M (R=Gd, Y and M=Co, Ni) compounds. The Debye temperatures, phonon and conduction electronic contributions as well as magnetic part of the specific heat are determined and discussed for Gd₃Co and Gd₃Ni compounds. Magnetocaloric effect was estimated for the Gd₃Co compound in magnetic field of 4 T

[en] The magnetization processes of the Ho₃Co single crystal along three basic symmetry axes were investigated and possible magnetic structure is suggested. Specific heat measurements of the compound have been performed at temperature range of 2-300 K. The phonon conduction electron and magnetic contributions to the total specific heat are determined and discussed. Two peaks observed on the magnetic part of the specific heat correspond to magnetic ordering transition (T_N=20 K) and Schottky anomaly (T_Sch∼30 K)

[en] Crystallographic structure, domain structure and magnetic properties of ternary Gd₃Fe_xTi₃ (x=34, 33, ..., 24), TbFe₁₁Ti and TbFe₁₀Ti alloys and single crystals are investigated. It is shown that all these compounds have a ThMn₁₂ tetragonal crystal structure. The wide homogeneous region for the ThMn₁₂ structure detected for this group of compounds is used to explain the differences in the values of spin-reorientation temperatures of RFe₁₁Ti compounds found by different authors

No abstract available

[en] The analysis of magnetocaloric effect in microcrystalline and nanocrystalline TbFe₁₁Ti and TbFe₈Ti intermetallic compounds was carried out. It was found that the dependence between the reduction of the grain size below a single domain size and value of magnetocaloric effect has a complicated nature. Probably, it is connected with the influence of intergrain exchange interaction in nanocrystalline alloys.

[en] Achieving a very strong magnetic anisotropy in a 3d material is a difficult, but not an impossible task. It is difficult because there is no general recipe (necessary condition) for a strong anisotropy in a band magnet. Several strategies can be pursued in this situation. One of them is to re-examine the less studied 3d compounds, somewhat neglected since the discovery of the Nd–Fe–B magnets 30 years ago. As an example, a single crystal of (Fe_0.7Co_0.3)₂B has been investigated in this work. (paper)