Fig. 3: Néel-type magnetic textures in a thin lamella of Cr1+δTe2 at 100 K.
From: Observation of Néel-type skyrmions in acentric self-intercalated Cr1+δTe2
a Definition of tilt angles, α and β, that are defined with respect to the [0001] direction. When α = β = 0, the electron beam of the transmission electron microscope is transmitted along [0001]. b Lorentz transmission electron microscopy (LTEM) image under zero tilt. c–f LTEM images in zero magnetic field for (c–d) α = ±15° and (e–f) β = ±15°. All images are recorded at a defocus value of −1.5 mm. The large darkened areas correspond to bending contours. The lamella has a thickness of ≈ 82 nm. All micrographs are obtained from the same region. g LTEM image at a defocus value of −0.5 mm in zero magnetic field upon +4° tilting from the [01\(\bar{1}\)1] direction that corresponds to α = +33°, showing that the magnetic contrast is similar to that obtained at a higher defocus value. The lamella has a thickness of ≈ 75 nm. h Calculated LTEM contrast of the Néel skyrmion for a tilt of ±15° about the vertical axis in the image.
