Figure 1

(a) Hysteresis loops measured perpendicular to the sample after field cooling (filled squares) the sample in 1.0 T and zero-field cooling (open squares) in a stripe domain pattern. The hysteresis loops were measured from $\pm 5\mathrm{T}$ and were featureless above 1 T. The field-cooled loop shows an exchange-bias field of $-105\mathrm{m}\mathrm{T}$ and a coercive field of 376 mT. (b) Temperature evolution of the exchange bias and the coercivity after field cooling the sample.Reuse & Permissions

Figure 2

Evolution of MFM images in an applied field after cooling in a stripe domain pattern. All images are $5\times 5\mu \mathrm{m}$. (a) MFM image of the original FM stripe domains after zero-field cooling. (b) In an applied field of $+650\mathrm{m}\mathrm{T}$ the white domains shrink in width and length. (c) At $+800\mathrm{m}\mathrm{T}$ the FM layers are saturated, nevertheless stripe domains with weak contrast remain visible and persist in fields up to 7 T. (d) Reversing the field to $-400\mathrm{m}\mathrm{T}$ the original domain pattern is recovered. However, due to the flipped tip magnetization the contrast is reversed when compared to (a). (e) Line scans from identical locations in (a) and (c) shown by the red lines. The high field image has inverted contrast compared to the original domains.Reuse & Permissions

Figure 3

(a) MFM image and typical cross section after zero-field cooling. (b) Magnetization pattern and cross section generated from the MFM image (a). The modeled (c) and measured (a) gray scale images agree extremely well.Reuse & Permissions

Figure 4

(a) MFM image and a typical cross section at 800 mT. (b) Magnetization pattern and cross section generated from the MFM image (a). The modeled (c) and measured (a) gray scale images agree extremely well.Reuse & Permissions