No abstract available

No abstract available

No abstract available

[en] A novel single-phase Y₃(Fe,Mo)₂₉ compound with Mo as a new stabilizing element has been synthesized with nominal composition Y_10.5Fe_86.7Mo_2.8 via annealing at 1313 K for three days, and then water quenching. The results of thermomagnetic analysis (TMA) show a magnetic ordering temperature of 376 K. X-ray diffraction gives lattice parameters a=10.570 A, b=8.508 A, c=9.673 A and β=96.98 . The temperature dependence of the magnetization M_s of Y_10.5Fe_86.7Mo_2.8 in an applied magnetic field up to 7 T and the temperature dependence of the anisotropy field B_a are also reported. (orig.)

[en] The microstructure and coercivity of Fe_77.5-x-yCu_xNb_ySi_13.5B₉ (x = 0 or 1, y = 0 or 3) alloys in the as-quenched state and after accumulative annealing at different temperatures were investigated. It was found that the addition of Cu to Fe-based amorphous alloys accelerates their crystallization. Only the simultaneous addition of Cu and Nb to Fe-based amorphous alloys results in the magnetization vector becoming almost parallel to the ribbon surface and the coercivity reaching a very low value in crystalline materials. (orig.)

[en] The growth of nanocrystallites in amorphous Fe_73.5Mo₃Cu₁Si_13.5B₉ alloy is described by the formalism of precipitation from a supersaturated matrix taking into account the change of matrix composition. The transformation kinetics is determined by isothermal magnetization measurements. The results fit the theory well. The solute is enriched in the amorphous matrix. (orig.)

[en] The saturation magnetostriction (λ_s) of Fe_73.5Nb₃Cu₁Si_13.5B₉ alloy samples was determined using the capacitance method and the transverse susceptibility method. The values of λ_s decreased from (24.3-26.3).10^-6 to (0.5-2.5).10^-6 and then increased to 5.6.10^-6 for the sample annealed at 650 C. The differences of the two methods were from 0 to 20% in the amorphous state and somewhat higher for the nanocrystalline state. (orig.)

[en] The effect of gamma-irradiation on the domain structure of ferrite-garnet films was studied. It was found that ionizing irradiation suppresses hard bubbles. The causes of the effect of gamma-irradiation on the magnetic properties and domain structure of the films are discussed. (orig.)

[en] For amorphous-FeNiB (2.0nm)/Ru multilayers, an oscillatory interlayer coupling is observed with the variation of the Ru spacer thickness. At 0.8nm thick Ru layer, near the first antiferromagnetic coupling maximum, the energy of the effective interlayer coupling at low temperature T is found to change as a linear function of T^3/2. At the same time, the spontaneous magnetization of the samples at low temperature scales as a linear function of T. Therefore, the temperature dependence of the energy of the effective coupling might be controlled by thermal spin waves in the ferromagnetic layers

[en] DC magnetisation, electrical resistivity, specific heat and ¹⁵⁵Gd Mossbauer spectroscopy measurements demonstrate that the Gd sub-lattice of GdNiAl₄ undergoes two magnetic transitions (T_N=24.7K, T_N^'=20.8K) as the temperature is decreased. Given that Gd³⁺ is an S-state ion, a crystal field mechanism can be ruled out as the origin of similar behaviour observed elsewhere for RNiAl₄ with R=Pr_1-xNd_x (0=< x=<0.7) and Tb. Based on a comparison of point charge model calculations of the electric field gradient tensor with those measured at the ¹⁵⁵Gd nucleus, it is deduced that the magnetisation is aligned with either the b- or c-crystallographic axis of the orthorhombic structure