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Controlling the switching field in nanomagnets by means of domain-engineered antiferromagnets

  • Author(s): Folven, E;
  • Linder, J;
  • Gomonay, OV;
  • Scholl, A;
  • Doran, A;
  • Young, AT;
  • Retterer, ST;
  • Malik, VK;
  • Tybell, T;
  • Takamura, Y;
  • Grepstad, JK
  • et al.
Abstract

Using soft x-ray spectromicroscopy, we investigate the magnetic domain structure in embedded nanomagnets defined in La0.7Sr0.3MnO3 thin films and LaFeO3/La0.7Sr0.3MnO3 bilayers. We find that shape-controlled antiferromagnetic domain states give rise to a significant reduction of the switching field of the rectangular nanomagnets. This is discussed within the framework of competition between an intrinsic spin-flop coupling and shape anisotropy. The data demonstrates that shape effects in antiferromagnets may be used to control the magnetic properties in nanomagnets.

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