Electromagnon in ferrimagnetic ?-Fe2O3 nanograin ceramics
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00396756" target="_blank" >RIV/68378271:_____/13:00396756 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevB.88.104301" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.88.104301</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.88.104301" target="_blank" >10.1103/PhysRevB.88.104301</a>
Alternative languages
Result language
angličtina
Original language name
Electromagnon in ferrimagnetic ?-Fe2O3 nanograin ceramics
Original language description
Electromagnons are known from multiferroics as spin waves excited by the electric component of electromagnetic radiation. We report the discovery of an excitation in the far-infrared spectra of ?-Fe2O3, which we attribute to an electromagnon appearing below 110 K where the ferrimagnetic structure becomes incommensurately modulated. Inelastic neutron scattering shows that the electromagnon energy corresponds to that of a magnon from the Brillouin-zone boundary. Dielectric measurements did not reveal anysign of ferroelectricity in ?-Fe2O3 down to 10 K, despite its acentric crystal structure. This shows that the activation of an electromagnon requires, in addition to the polar ferrimagnetic structure, a modulation of the magnetic structure. We demonstrate that a combination of inelastic neutron scattering with infrared and/or terahertz (THz) spectroscopies allows detecting electromagnons in ceramics where no crystal-orientation analysis of THz and infrared spectra is possible.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP204%2F12%2F1163" target="_blank" >GAP204/12/1163: Phonon and dielectric spectroscopy of multiferroics</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review. B
ISSN
1098-0121
e-ISSN
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Volume of the periodical
88
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
"104301-1"-"104301-8"
UT code for WoS article
000323942600002
EID of the result in the Scopus database
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