Home > Publications database > Solitary Magnons in the S = 5/2 Antiferromagnet CaFe$_2$O$_4$ > print |
001 | 824843 | ||
005 | 20210129225133.0 | ||
024 | 7 | _ | |a 10.1103/PhysRevLett.117.017201 |2 doi |
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024 | 7 | _ | |a 1079-7114 |2 ISSN |
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100 | 1 | _ | |a Stock, C. |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
245 | _ | _ | |a Solitary Magnons in the S = 5/2 Antiferromagnet CaFe$_2$O$_4$ |
260 | _ | _ | |a College Park, Md. |c 2016 |b APS |
336 | 7 | _ | |a article |2 DRIVER |
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520 | _ | _ | |a 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. |
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773 | _ | _ | |a 10.1103/PhysRevLett.117.017201 |g Vol. 117, no. 1, p. 017201 |0 PERI:(DE-600)1472655-5 |n 1 |p 017201 |t Physical review letters |v 117 |y 2016 |x 1079-7114 |
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