Resonant elastic X-ray scattering in Mn1.4PtSn reveals a field-induced transition from a π-chiral soliton lattice to a fan state with continuously decreasing modulation length when the field is applied perpendicular to the chiral axis.
Fan-type spin structure in uni-axial chiral magnets
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abstract
We investigate the spin structure of a uni-axial chiral magnet near the transition temperatures in low fields perpendicular to the helical axis. We find a fan-type modulation structure where the clockwise and counterclockwise windings appear alternatively along the propagation direction of the modulation structure. This structure is often realized in a Yoshimori-type (non-chiral) helimagnet but it is rarely realized in a chiral helimagnet. To discuss underlying physics of this structure, we reconsider the phase diagram (phase boundary and crossover lines) through the free energy and asymptotic behaviors of isolated solitons. The fan structure appears slightly below the phase boundary of the continuous transition of instability-type. In this region, there are no solutions containing any types of isolated solitons to the mean field equations.
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cond-mat.mtrl-sci 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
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Quasi-1D Spin Textures: From Chiral Soliton Lattice to Fan State
Resonant elastic X-ray scattering in Mn1.4PtSn reveals a field-induced transition from a π-chiral soliton lattice to a fan state with continuously decreasing modulation length when the field is applied perpendicular to the chiral axis.