Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-06-08
Phys. Rev. B 77, 012406 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
Final published version
Scientific paper
10.1103/PhysRevB.77.012406
The magnon and optical phonon spectrum of an incommensurate multiferroic such as BiFeO3 is considered in the framework of a phenomenological Landau theory. The resulting spin wave spectrum is quite distinct from commensurate substances due to soft mode anisotropy and magnon zone folding. The former allows electrical control of spin wave propagation via reorientation of the spontaneous ferroelectric moment. The latter gives rise to multiple magneto-dielectric resonances due to the coupling of optical phonons at zero wavevector to magnons at integer multiples of the cycloid wavevector. These results show that the optical response of a multiferroic reveals much more about its magnetic excitations than previously anticipated on the basis of simpler models.
Moore Joel E.
Sousa Rogerio de
No associations
LandOfFree
Optical coupling to spin waves in the cycloidal multiferroic BiFeO3 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Optical coupling to spin waves in the cycloidal multiferroic BiFeO3, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical coupling to spin waves in the cycloidal multiferroic BiFeO3 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-126125