Experimental study of domain wall motion in long nanostrips under the influence of a transverse field

We report the real time study of field driven domain wall (DW) motion in giant magnetoresistance nanostrips under the influence of both longitudinal and transverse fields. We have found clear evidence that transverse fields influence the DW dynamics below and above the Walker field [N. L. Schryer and L. R. Walker, J. Appl. Phys. 45, 5406 (1974)] drastically. We show the suppression of the Walker breakdown process and a huge enhancement in DW velocity below the Walker field. The maximum velocity reported here is 4500 m/s. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2993329]