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It was shown that in the frustrated ferromagnet belonging to the group of structurally ordered Fe_x Mn1-x Pt3 alloys the temperature of the transition from the ferromagnetic state to the asperomagnetic state followed a Gabay–Toulouse line.

The magnetic state properties have been studied in YBa2Cu3O6+x with (0.06

It was shown that in the Heisenberg frustrated antiferromagnetic FexNi80−xCr20 alloys with the concentrations (x) near critical point the following succession of transitions is observed under cooling: paramagnet — collinear antiferromagnet- non-collinear antiferromagnet (antiasperomagnet) — reentrant spin glass. For the frustrated ferromagnetic (FexMn1−x)Pt3 alloys the existence of slow relaxation processes was shown which are the result of dynamic crossover from the ferromagnetic state to an asperomagnetic one.

The giant mobility of the magnetic flux in FrFC and ZFC conditions have been studied in textured sample Bi2Sr2CaCu2O2-δ byμSR. The comparison of results obtained in both cases showed that it is difficult to explain this phenomenon by only thermally activated flux creep and the melting of vortex lattice must be considered. The magnetic field dependence of the melting temperature was obtained for H

The effect of acoustic oscillations of the α-quartz crystalline lattice on the behaviour of muonium polarization has been studied experimentally. It is shown that when the frequency of the standing ultrasound wave coincides with one of the muonium quadrupole interaction frequencies a specific broadening of the muonium line occurs; that is a muonium acoustic resonance is observed. The possibilities of using this effect for investigating properties of solids by the μSR method are discussed.

The zero field μSR-method has been used to study the magnetism in the disordered magnetic alloy Fe82−xNixCr18 near the three-critical, pointx=25. The dynamic and static local field distributions are analyzed. The difference between spin-glass states obtained either from the paramagnetic or after the double transition is discussed.

In this work the magnetic and superconducting properties of YBa2Cu3O6+x , ceramic samples are studied with regard to there preparations technology and oxygen content. It is shown that at 0.41≤x≤0.45 the magnetic and superconducting states coexist.

The values of the penetration depths and their temperature dependences were measured for differentc-axis orientations of a textured 2.2.1.2. sample. The remanent magnetic flux was studied. The giant mobility of the trapped vortex structure was found above 40 K.