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Bistable Coupling States Measured on Single Co Nanoclusters Deposited on CoO(111)

Abstract : We describe novel features of the induced magnetic anisotropy in Co nanoclusters coupled with a CoO(111) layer. Individual cluster magnetism was studied using new microbridge superconducting quantum interference devices. Intrinsically, the Co clusters are single domains with an effective anisotropy constant K-F approximate to 1.5 x 10(6) erg . cm(-3). A bistable state of the ferromagnetic-antiferromagnetic coupling is revealed, with a maximum bias systematically observed along CoO[10 (1) over bar] and an interfacial coupling energy of 0.9 erg . cm(-2). The small bias observed in cluster assembly results from an averaging over the two opposite stable states.
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https://hal.archives-ouvertes.fr/hal-00976008
Contributor : Lilian de Coster <>
Submitted on : Wednesday, April 9, 2014 - 2:42:57 PM
Last modification on : Wednesday, March 3, 2021 - 11:19:07 AM

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D. Le Roy, R. Morel, S. Pouget, A. Brenac, L. Notin, et al.. Bistable Coupling States Measured on Single Co Nanoclusters Deposited on CoO(111). Physical Review Letters, American Physical Society, 2011, 107 (5), pp.057204. ⟨10.1103/PhysRevLett.107.057204⟩. ⟨hal-00976008⟩

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