Physics – Condensed Matter – Materials Science
Scientific paper
2009-11-09
Phys. Rev. B v81, 094405 (2010)
Physics
Condensed Matter
Materials Science
Scientific paper
10.1103/PhysRevB.81.094405
In the first part of this work we calculate the high frequency magnetoelectric susceptibility of a simultaneously ferroelectric and canted antiferromagnetic (also know as weak ferromagnetic) thin film with magnetostrictive magnetoelectric coupling. We show that a dynamic coupling exists between the ferroelectric and optic antiferromagnetic excitations. In the second part of the paper, we calculate using an effective medium method the susceptibility of a heterostructure comprising alternating thin films of such a material together with a ferromagnet. Dipolar magnetic fields serve to couple the ferromagnetic and optic antiferromagnetic modes, which in turn couples the ferromagnetic and ferroelectric excitations. This provides a mechanism for creating "electromagnon" modes in the microwave regime which may be useful for applications.
Livesey K. L.
Stamps Robert L.
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