Incommensurate--commensurate transitions in the mono-axial chiral helimagnet driven by the magnetic field

Abstract

The zero temperature phase diagram of the mono-axial chiral helimagnet in the magnetic field plane formed by the components parallel and perpendicular to the helical axis is thoroughly analyzed. The nature of the transition to the commensurate state depends on the angle between the field and the helical axis. For field directions close to the directions parallel or perpendicular to the helical axis the transition is continuous, while for intermediate angles the transition is discontinuous and the incommensurate and commensurate states coexist on the transition line. The continuous and discontinuous transition lines are separated by two tricritical points with specific singular behaviour. The location of the continuous and discontinuous lines and of the tricritical points depend strongly on the easy-plane anisotropy, the effect of which is analyzed. For large anisotropy the conical approximation locates the transition line very accurately, although it does not predict the continuous transitions nor the tricitical behaviour. It is shown that for large anisotropy, as in CrNb3S6, the form of the transition line is universal, that is, independent of the sample, and obeys a simple equation. The position of the tricritical points, which is not universal, is theoretically estimated for a sample of CrNb3S6

arXiv comment10 pages, 9 figures

References in corpus (5)

• Magnetic phase transitions in single crystals of the chiral helimagnet Cr1/3NbS2
• Discrete helicoidal states in chiral magnetic thin films
• Coherent sliding dynamics and spin motive force driven by crossed magnetic fields in chiral helimagnet
• Out-of-Plane Spin-Orientation Dependent Magnetotransport Properties in the Anisotropic Helimagnet Cr${}_{1/3}$NbS${}_2$
• Spin Structure of the Anisotropic Helimagnet Cr${}_{1/3}$NbS${}_2$ in a Magnetic Field

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• Tricritical point and phase diagram based on critical scaling in monoaxial chiral helimagnet Cr1/3NbS2
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• Annihilation and Control of Chiral Domain Walls with Magnetic Fields
• Nucleation, instability, and discontinuous phase transitions in monoaxial helimagnets with oblique fields
• Chiral solitons in monoaxial chiral magnets in tilted magnetic field
• Stability of skyrmion textures and the role of thermal fluctuations in cubic helimagnets: a new intermediate phase at low temperature
• Thermal fluctuations in the conical state of monoaxial helimagnets
• Lock-in of a Chiral Soliton Lattice by Itinerant Electrons
• Instabilities in monoaxial chiral magnets under a tilted magnetic field
• Response of the chiral soliton lattice to spin polarized currents
• Skyrmions and antiskyrmions in monoaxial chiral magnets
• Emergent electric field from magnetic resonances in a one-dimensional chiral magnet
• The continuum of metastable conical states of monoaxial chiral helimagnets
• Soliton penetration from edges in a monoaxial chiral magnet