Livesey, K.L. and Stamps, R.L. (2010) High-frequency susceptibility of a weak ferromagnet with magnetostrictive magnetoelectric coupling: Using heterostructures to tailor electromagnon frequencies. Physical Review B, 81(9), 094405. (doi: 10.1103/PhysRevB.81.094405)
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Publisher's URL: http://dx.doi.org/10.1103/PhysRevB.81.094405
Abstract
In the first part of this work we calculate the high-frequency magnetoelectric susceptibility of a simultaneously ferroelectric and canted antiferromagnetic (also known 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.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Stamps, Professor Robert |
| Authors: | Livesey, K.L., and Stamps, R.L. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review B |
| ISSN: | 1098-0121 |
| ISSN (Online): | 1550-235X |
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