title: Macroscopic evidence for Abrikosov-type magnetic vortexes in MnSi A-phase.
abstract: 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.
authors.affiliation: Moscow Institute of Physics and Technology, 9 Institutsky lane, Dolgoprudny 141700 Moscow Region, Russia.
authors.forename: I I
authors.initials: II
authors.lastname: Lobanova
authors.affiliation: Moscow Institute of Physics and Technology, 9 Institutsky lane, Dolgoprudny 141700 Moscow Region, Russia.|Prokhorov General Physics Institute of RAS, 38, Vavilov str. 119991 Moscow, Russia.
authors.forename: V V
authors.initials: VV
authors.lastname: Glushkov
authors.affiliation: Moscow Institute of Physics and Technology, 9 Institutsky lane, Dolgoprudny 141700 Moscow Region, Russia.|Prokhorov General Physics Institute of RAS, 38, Vavilov str. 119991 Moscow, Russia.
authors.forename: N E
authors.initials: NE
authors.lastname: Sluchanko
authors.affiliation: Moscow Institute of Physics and Technology, 9 Institutsky lane, Dolgoprudny 141700 Moscow Region, Russia.|Prokhorov General Physics Institute of RAS, 38, Vavilov str. 119991 Moscow, Russia.
authors.forename: S V
authors.initials: SV
authors.lastname: Demishev