TY  - JOUR
AU  - Rybakov, Filipp N
AU  - Borisov, Aleksandr B
AU  - Blügel, Stefan
AU  - Kiselev, Nikolai
TI  - New spiral state and skyrmion lattice in 3D model of chiral magnets
JO  - New journal of physics
VL  - 18
IS  - 4
SN  - 1367-2630
CY  - [Bad Honnef]
PB  - Dt. Physikalische Ges.
M1  - FZJ-2016-02371
SP  - 045002
PY  - 2016
AB  - We present the phase diagram of magnetic states for films of isotropic chiral magnets (ChMs) calculated as function of applied magnetic field and thickness of the film. We have found a novel magnetic state driven by the natural confinement of the crystal, localized at the surface and stacked on top of the conical bulk phase. This magnetic surface state has a three-dimensional (3D) chiral spin-texture described by the superposition of helical and cycloidal spin spirals. This surface state exists for a large range of applied magnetic fields and for any film thickness beyond a critical one. We also identified the whole thickness and field range for which the skyrmion lattice becomes the ground state of the system. Below a certain critical thickness the surface state and bulk conical phase are suppressed in favor of the skyrmion lattice. Unraveling of those phases and the construction of the phase diagram became possible using advanced computational techniques for direct energy minimization applied to a basic 3D model for ChMs. Presented results provide a comprehensive theoretical description for those effects already observed in experiments on thin films of ChMs, predict new effects important for applications and open perspectives for experimental studies of such systems.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000375472400001
DO  - DOI:10.1088/1367-2630/18/4/045002
UR  - https://juser.fz-juelich.de/record/808750
ER  -