Magnetic Bistability of Co Nanodots

H. F. Ding, A. K. Schmid, Dongqi Li, K. Yu. Guslienko, and S. D. Bader
Phys. Rev. Lett. 94, 157202 – Published 20 April 2005

Abstract

Size-dependent magnetic single-domain versus vortex state stability of Co/Ru(0001) nanodots is explored with spin-polarized low-energy electron microscopy, analytical modeling, and micromagnetic simulations. We show that both single-domain and vortex states can be stabilized in a broad region near the phase boundary. The calculated width of the bistability region and temperature dependent heights of the energy barriers between both states agree well with our experimental findings.

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  • Received 28 May 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.157202

©2005 American Physical Society

Authors & Affiliations

H. F. Ding1, A. K. Schmid2, Dongqi Li1, K. Yu. Guslienko1, and S. D. Bader1

  • 1Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
  • 2Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA

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Issue

Vol. 94, Iss. 15 — 22 April 2005

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