APS » PROLA » Phys. Rev. B » Volume 64 » Issue 21

Phys. Rev. B 64, 212402 (2001) [4 pages]

Fragility of the spin-glass-like collective state to a magnetic field in an interacting Fe-C nanoparticle system

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P. E. Jönsson, S. Felton, P. Svedlindh, and P. Nordblad
Department of Materials Science, Uppsala University, Box 534, SE-751 21 Uppsala, Sweden

M. F. Hansen
Department of Physics, Building 307, Technical University of Denmark, DK-2800 Lyngby, Denmark

Received 26 June 2001; published 2 November 2001

The effect of applied magnetic fields on the collective nonequilibrium dynamics of a strongly interacting Fe-C nanoparticle system has been investigated. It is experimentally shown that the magnetic aging diminishes to finally disappear for fields of moderate strength. The field needed to remove the observable aging behavior increases with decreasing temperature. The same qualitative behavior is observed in an amorphous metallic spin glass (Fe0.15Ni0.85)75P16B6Al3.


©2001 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v64/e212402
DOI: 10.1103/PhysRevB.64.212402
PACS: 75.50.Tt, 75.50.Lk, 75.10.Nr, 75.50.Mm

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