S. V. Demishev

Macroscopic evidence for Abrikosov-type magnetic vortexes in MnSi A-phase.

Intrinsic phase coherence between individual topologically stable knots in spin arrangement – skyrmions – is known to induce the crystalline-like structure in the A-phase of non-centrosymmetric MnSi with chiral spin-orbit interaction. Here we report the experimental evidence for two types of the skyrmion lattice (SL) inside the A-phase of MnSi, which are distinguished by different coupling to the anisotropic magnetic interactions. The transition between these SLs is shown to induce a change in magnetic scattering between isotropic MR discovered in the area inside the A-phase (the A-phase core) and anisotropic MR found on the border of the A-phase. We argue that the SL in the A-phase core corresponds to the dense skyrmion state built from individual skyrmions in a way similar to Abrikosov-type magnetic vortexes.

Anomalous spin relaxation and quantum criticality in Mn1 − xFexSi solid solutions

We report results of the high frequency (60 GHz) electron spin resonance (ESR) study of the quantum critical metallic system Mn1 − xFexSi. The ESR is observed for the first time in the concentration range 0 < x < 0.24 at temperatures up to 50 K. The application of the original experimental technique allowed carrying out line shape analysis and finding full set of spectroscopic parameters, including oscillating magnetization, line width and g factor. The strongest effect of iron doping consists in influence on the ESR line width and spin relaxation is marked by both violation of the classical Korringa-type relaxation and scaling behavior. Additionally, the non-Fermi-liquid effects in the temperature dependence of the ESR line width, which may be quantitatively described in the theory of Wölfle and Abrahams, are observed at quantum critical points x* ∼ 0.11 and xc ∼ 0.24.

Charge transport in HoxLu1-xB12: Separating Positive and Negative Magnetoresistance in Metals with Magnetic Ions

The magnetoresistance (MR)

Anomalous Hall effect in MnSi: Intrinsic to extrinsic crossover

\Delta \rho/\rho

Magnetic resonance anisotropy in CeB6: an entangled state of the art.

of cage-glass compound Ho

The Competition between Staggered Field and Antiferromagnetic Interactions in CuGeO3:Fe

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Electron nematic effect induced by magnetic field in antiferroquadrupole phase of CeB 6

Lu

Magnetic properties of the fullerene organic compounds in strong magnetic fields

_{1-x}

ENHANCEMENT OF ELECTRON-PHONON INTERACTIONS IN THE NONEQUILIBRIUM SOLID SOLUTIONS AL1-XSIX

B

Scrutinizing Hall Effect in Mn_{1-x}Fe_{x}Si: Fermi Surface Evolution and Hidden Quantum Criticality.

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