[en] Measurement results of magnetic susceptibility (MS) dependence in Sn_1-xTe on hole concentration and temperature within p and T wide range are given. Abalysis of experimental curves shows that in χ(p,T=0) curve there are some peculiarities at p=1.1x10²⁰, 2.3x10²⁰ and 4.9x10²⁰ cm^-3 which are identified as Van Hove peculiarities corresponding to Σ-extremum, to saddle point in ΣL direction and to Δ-extremum of valent band. Effect of high nonparabolicity of heavy hole spectrum in Σ- and Δ-subbonds on contribution of heavy holes into MS is considered and estimations of some characteristics of hole spectrum are obtained

[en] Short note

[en] Thermodynamic properties of alloys in the system CdTe-HgTe are studied using electrochemical cells of two types in the range of 300-700 K. It is found that stability of solid solutions decreases with the temperature decrease

[en] Several magnetic features and critical scaling of low- and high-field magnetisation show that the (Gd_1-xTb_x)₂Cu amorphous alloys are magnets of random magnetic anisotropy (RMA) ranging with increasing x from coherent spin-glass to spin-glass character, which crossover to a quasiferromagnetic state at the highest fields. Magnetostriction measurements show that the RMA is quite strong and of single-ion origin. (orig.)

[en] An eutectic Fe-Nd(-Al) alloy was investigated, where a 3-phase equilibrium Nd₅Fe₁₇+μ+Nd was found. Their stability is discussed for different heat-treatments. The evolution of the microstructures with a continuously variable cooling rate is studied. (orig.)

[en] This paper reports on submicron filament bronze-processed multifilamentary Nb₃Sn wires with Cu-5at%Sn matrix and Nb or Nb alloy cores. The Nb alloy cores contained each of 1at%Zr, Ti, Hf or Ta. Among the peripheral Cu stabilizer type wires, the Nb-1Ta core wire showed the highest non Cu area critical current density Jc of 3 x 10⁴ A/cm² at 12 T after an optimum heat treatment, in spite of its relatively low Sn concentration in the matrix. The deformation of Nb cores into ribbon like shapes was apparently suppressed by the 1 at% addition of Ti, Hf or Ta. The values of Jc per unit magnetic hysteresis loss for the Ti, Hf and Ta alloyed Nb core wires have been evaluated to be higher than that for the pure Nb core wire

[en] It has been found that the critical current density, J_c, in high T_c oxide superconductors is reduced to zero at high temperatures and/or high magnetic fields even in a superconducting region. The irreversibility line was investigated in weakly pinned superconducting Nb-Ta with low T_c and was compared with that in oxide superconductors. Large flux flow noise with a peak around 0.3 Hz was observed in Nb-Ta specimens. The noise power integrated in the frequency range of 0.1-1.0 Hz had a sharp peak when it was plotted against the magnetic field. In this paper the mechanism of such a characteristic noise is argued

[en] The addition of Cu to amorphous U-As films lowers the resistivity and extends the compositional range of ferromagnetism. Although the saturation magnetization of these materials is small, they have large coercive fields, anomalous Hall effects and magneto-optical rotations which may be due in part to strong spin-orbit interactions. The uranium f-d transition found in the binary U-As is depressed and broadened by Cu. (orig.)

[en] The orientational magnetoresistance effects (Δρ) in as-deposited Fe-33% Ni films with thicknesses in the range 170-450 A deposited onto fused quartz (SiO₂) has been investigated. Δρ increased with decreasing film thickness though the magnetization decreased. On the other hand, in as-deposited α/γ-Fe-Ni coupled films with α-phase Fe-9% Ni and γ-phase Fe-33% Ni, the magnetization was unchanged though the B-H loop was changed. However, in α/γ-Fe-Ni coupled films annealed at 600degC (30 min) the orientational effect is enhanced in comparison with the case of as-deposited films, in which the B-H form is remarkably changed and the magnetization is reduced by about 17%. The singularity of the magnetoresistance effect can be attributed to the spatially inhomogeneous magnetic structure having a different magnetic component and a different exchange interaction between neighbouring interfaces. (orig.)

[en] Amorphous Fe_XZr_100-X films have been prepared in-situ by means of electron beam evaporation. Whereas ex-situ methods like melt-spinning and splat-cooling are restricted to very narrow concentration ranges, co-evaporation of the pure components allows the synthesis of alloys over an extended concentration range. Most importantly, sputter cleaning of the sample surface can be avoided, which may cause significant changes in the electronic structure as seen by photoemission. (orig.)