Creation of an Antiferromagnetic Exchange Spring

A. Scholl, M. Liberati, E. Arenholz, H. Ohldag, J. Stöhr
2004 Physical Review Letters  
We present evidence for the creation of an exchange spring in an antiferromagnet due to exchange coupling to a ferromagnet. X-ray magnetic linear dichroism spectroscopy on single crystal Co/NiO(001) shows that a partial domain wall is wound up at the surface of the antiferromagnet when the adjacent ferromagnet is rotated by a magnetic field. We determine the interface exchange stiffness and the antiferromagnetic domain wall energy from the field dependence of the direction of the
more » ... ic axis, the antiferromagnetic pendant to a ferromagnetic hysteresis loop. The existence of a planar antiferromagnetic domain wall, proven by our measurement, is a key assumption of most exchange bias models.
doi:10.1103/physrevlett.92.247201 pmid:15245128 fatcat:iqonze45djcftn2cblgpvaibiq