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24 April 2024 |
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Interfacial Coupling in Multiferroic-Ferromagnet Heterostructures | | M. Trassin
; J. D. Clarkson
; S. R. Bowden
; Jian Liu
; J. T. Heron
; R. J. Paull
; E. Arenholz
; D. T. Pierce
; J. Unguris
; | | Date: |
19 Apr 2013 | | Abstract: | We report local probe investigations of the magnetic interaction between
BiFeO3 films and a ferromagnetic Co0.9Fe0.1 layer. Within the constraints of
intralayer exchange coupling in the Co0.9Fe0.1, the multiferroic imprint in the
ferromagnet results in a collinear arrangement of the local magnetization and
the in-plane BiFeO3 ferroelectric polarization. The magnetic anisotropy is
uniaxial, and an in-plane effective coupling field of order 10 mT is derived.
Measurements as a function of multiferroic layer thickness show that the
influence of the multiferroic layer on the magnetic layer becomes negligible
for 3 nm thick BiFeO3 films. We ascribe this breakdown in the exchange coupling
to a weakening of the antiferromagnetic order in the ultrathin BiFeO3 film
based on our X-ray linear dichroism measurements. These observations are
consistent with an interfacial exchange coupling between the CoFe moments and a
canted antiferromagnetic moment in the BiFeO3. | | Source: | arXiv, 1304.5394 | | Services: | Forum | Review | PDF | Favorites | |
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