Fig. 3: Tilted spiral phase at the surface of Cu2OSeO3.

a, b Images of Bz(x, y) at T = 5 K under indicated magnetic fields applied along \(\left[001\right]\). c, d Fast Fourier transforms of images (a) and (b), respectively. e Extracted tilt angles θ and ϕ as a function of the applied magnetic field. f, g Illustration of the magnetization in the TS phase from the side and top of the crystal, respectively, with tilt angles θ and ϕ, and the modulation wavelength λm, represented.