National Physical Laboratory

Large Hall device

Large Hall device
<P align="left">(a) 100 x 20 µm<SUP>2</SUP> Hall device with an attached single magnetic bead. (b) FIB-modified Hall device with the effective size 5 x 5 µm<SUP>2</SUP>. One FIB track is emphasised by a dashed contour for visibility.</P>