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Direct evidence of imprinted vortex states in the antiferromagnet of exchange biased microdisks

DOI: 10.1063/1.3168515 DOI Help

Authors: J. Kavich (Centre d'Investigació en Nanociència i Nanotecnologia (ICN-CSIC)) , J. Sort (ICREA) , A. Murarza (Centre d'Investigació en Nanociència i Nanotecnologia (ICN-CSIC)) , S. Stepanow (Centre d'Investigació en Nanociència i Nanotecnologia (ICN-CSIC)) , V. Baltz (SPINTEC) , B. Dieny (SPINTEC) , S. Dhesi (Diamond Light Source) , H. Marchetto (Diamond Light Source) , A. Potenza (Diamond Light Source) , G. Salazar-alvarez (Centre d'Investigació en Nanociència i Nanotecnologia (ICN-CSIC))
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Applied Physics Letters , VOL 95 , PAGES 95

State: Published (Approved)
Published: July 2009

Abstract: The magnetic domain structure of patterned antiferromagnetic/ferromagnetic Ir20Mn80 /Ni80Fe20 bilayer microdisk arrays has been investigated using layer-specific polarized x-ray photoemission electron microscopy and magnetic circular dichroism. Magnetic imaging at the Fe and MnL-edge resonances provided direct evidence of a vortex state imprinted into the antiferromagnet at the interface. The opposite magnetic contrast between the layers indicated a reversed chirality of the imprinted vortex state, and a quantitative analysis of the magnetic moment from the dichroism spectra showed that uncompensated Mn spins equivalent to about 60% of a monolayer of bulk Ir20Mn80 contributed to the imprinted information at the interface.

Journal Keywords: Antiferromagnetism; Atomic Force Microscopy; Ferromagnetism; Nickel; Rotating Flows

Subject Areas: Physics

Instruments: I06-Nanoscience

Added On: 29/07/2009 12:56

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