Using Lorenz microscopy and small-angle electron diffraction, we directly present that the chiral magnetic soliton lattice (CSL) continuously evolves from a chiral helimagnetic structure in small magnetic fields in ${\mathrm{Cr}}_{1/3}{\mathrm{NbS}}_2$. An incommensurate CSL undergoes a phase transition to a commensurate ferromagnetic state at the critical field strength. The period of a CSL, which exerts an effective potential for itinerant spins, is tuned by simply changing the field strength. Chiral magnetic orders observed do not exhibit any structural dislocation, indicating their high stability and robustness in ${\mathrm{Cr}}_{1/3}{\mathrm{NbS}}_2$.

We investigate the interlayer magnetoresistance (MR) along the chiral crystallographic axis in the hexagonal chiral magnet ${\mathrm{CrNb}}_3{\mathrm{S}}_6$. In a region below the incommensurate-commensurate phase transition between the chiral soliton lattice and the forced ferromagnetic state, a negative MR is obtained in a wide range of temperature, while a small positive MR is found very close to the Curie temperature. Normalized data of the negative MR almost falls into a single curve and is well fitted by a theoretical equation of the soliton density, meaning that the origin of the MR is ascribed to the magnetic scattering of conduction electrons by a nonlinear, periodic, and countable array of magnetic soliton kinks.

We present how macroscopically coherent ordering within a chiral state can be manifested in the physical properties within the context of an archetypical system—the chiral spin soliton lattice in a monoaxial chiral magnet ${\mathrm{CrNb}}_3{\mathrm{S}}_6$. Using magnetotransport measurements and state-of-the-art Lorentz electron microscopy, we demonstrate spin soliton confinement in $1-\mu \mathrm{m}$-wide grains with different crystalline chirality and discretized magnetoresistance in $10-\mu \mathrm{m}$-wide crystals. Discretization effects are found to be prominent when the system size is reduced to the order of $10\mu \mathrm{m}$ along the chiral axis. A consequence that we identify is a robust coherence of the chiral soliton lattice against deformation. The spin configuration at the grain boundaries, which leads to soliton confinement, is experimentally clarified.

A novel molecular spin ladder structure of a nickel dithiolate complex has been constructed using a supramolecular cation composed of anilinium and 18-crown-6.