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@ARTICLE{Stock:824843,
author = {Stock, C. and Rodriguez, E. E. and Lee, N. and Green, M. A.
and Demmel, F. and Ewings, R. A. and Fouquet, P. and Laver,
M. and Niedermayer, Ch. and Su, Y. and Nemkovskiy, Kirill
and Rodriguez-Rivera, J. A. and Cheong, S.-W.},
title = {{S}olitary {M}agnons in the {S} = 5/2 {A}ntiferromagnet
{C}a{F}e$_2${O}$_4$},
journal = {Physical review letters},
volume = {117},
number = {1},
issn = {1079-7114},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2016-07345},
pages = {017201},
year = {2016},
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.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / JCNS-2},
ddc = {550},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)DNS-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000378878700007},
pubmed = {pmid:27419585},
doi = {10.1103/PhysRevLett.117.017201},
url = {https://juser.fz-juelich.de/record/824843},
}