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Conventional MFM images of demagnetized 250-nm-thick MnAs film at varying temperatures, in which the observed scan area was and the easy axis was perpendicular to the stripe direction.
Conventional (a) AFM and (b) MFM images of 250-nm-thick MnAs film at . The AFM and the MFM images were taken at the same scan area and position. (c) The profile of the Bloch line MFM signal to an alternating sequence of black and white segments (gray dashed line) in the black dashed rectangular outline defined as in (b). (d) The experimental line scans of the MFM phase image taken along a white dashed line perpendicular to the Bloch line, as indicated in (b). The FWHM of the profile is approximately 125 nm.
(a) Schematic diagram of the periodic Bloch line by direct front TS-MFM. (b) TS-MFM image of the 250-nm-thick MnAs film at , in which the observed area is . (c) A line profile of the TS-MFM phase signal across the vertical domain walls in the white dashed lines (i and ii) defined as in (b), together with the corresponding spin direction schematics.
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