Stock, C., Rodriguez, E. E., Lee, N., Green, M.A., Demmel, F., Ewings, R. A., Fouquet, P., Laver, M., Niedermayer, Ch., Su, Y., and others. (2016) Solitary Magnons in the S=5/2 Antiferromagnet CaFe2O4. Physical Review Letters, 117 (1). ISSN 0031-9007. (doi:10.1103/PhysRevLett.117.017201) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:60104)
| The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. | |
| Official URL: http://doi.org/10.1103/PhysRevLett.117.017201 |
Abstract
CaFe2O4 is a S=52 anisotropic antiferromagnet based upon zig-zag chains having two competing magnetic structures, denoted as the A (????) and B (????) phases, which differ by the c-axis stacking of ferromagnetic stripes. We apply neutron scattering to demonstrate that the competing A and B phase order parameters result in magnetic antiphase boundaries along c which freeze on the time scale of ?1??ns at the onset of magnetic order at 200 K. Using high resolution neutron spectroscopy, we find quantized spin wave levels and measure 9 such excitations localized in regions ?1–2 c-axis lattice constants in size. We discuss these in the context of solitary magnons predicted to exist in anisotropic systems. The magnetic anisotropy affords both competing A+B orders as well as localization of spin excitations in a classical magnet.
| Item Type: | Article |
|---|---|
| DOI/Identification number: | 10.1103/PhysRevLett.117.017201 |
| Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
| Depositing User: | Matthias Werner |
| Date Deposited: | 26 Jan 2017 12:45 UTC |
| Last Modified: | 17 Aug 2022 12:21 UTC |
| Resource URI: | https://kar.kent.ac.uk/id/eprint/60104 (The current URI for this page, for reference purposes) |
University of Kent Author Information
Green, M.A..
| Creator's ORCID: |
 https://orcid.org/0000-0002-7886-6205
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