Imprinting vortices into antiferromagnets
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Buchanan, K. S. (Argonne National Laboratory. Materials Science Division)
Novosad, V. (Argonne National Laboratory. Materials Science Division)
Hoffmann, Axel (Argonne National Laboratory. Materials Science Division)
Salazar Álvarez, Germán (Universitat Autònoma de Barcelona. Departament de Física)
Bollero, A. (SPINTEC (Spin Electronics Research))
Baró, M. D.. (Universitat Autònoma de Barcelona. Departament de Física)
Dieny, Bernard (SPINTEC (Spin Electronics Research))
Nogués, Josep (Universitat Autònoma de Barcelona. Departament de Física)
American Physical Society
Date: |
2006 |
Abstract: |
The effect of imprinting symmetric and displaced vortex structures into an antiferromagnetic material is investigated in micron-sized disks consisting of exchange coupled ferromagnetic-antiferromagnetic bilayers. The imprint of displaced vortices manifests itself by the occurrence of a new type of asymmetric hysteresis loops characterized by curved, reversible, central sections with nonzero remanent magnetization. Such an imprint is achieved by cooling the disks through the blocking temperature of the system in small fields. Micromagnetic simulations reveal that asymmetric vortexlike loops naturally result from the competition between the different energies involved in the system. |
Note: |
Premi a l'excel·lència investigadora. Àmbit de les Ciències Tecnològiques. 2008 |
Rights: |
Tots els drets reservats. |
Language: |
Anglès |
Document: |
Article ; recerca ; Versió publicada |
Subject: |
PREI2008 |
Published in: |
Physical review letters, Vol. 97, Issue 6 (August 2006) , p. 1-4, ISSN 1079-7114 |
DOI: 10.1103/PhysRevLett.97.067201
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Record created 2011-02-14, last modified 2024-07-11