Possible coupling between magnons and phonons in multiferroic CaMn7O12
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10281076" target="_blank" >RIV/00216208:11320/14:10281076 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/14:00432532
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevB.90.054307" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.90.054307</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.90.054307" target="_blank" >10.1103/PhysRevB.90.054307</a>
Alternative languages
Result language
angličtina
Original language name
Possible coupling between magnons and phonons in multiferroic CaMn7O12
Original language description
Spin and lattice dynamics of CaMn7O12 ceramics were investigated using infrared, THz, and inelastic neutron scattering (INS) spectroscopies in the temperature range 2 to 590 K, and, at low temperatures, in applied magnetic fields of up to 12 T. On cooling, we observed phonon splitting accompanying the structural phase transition at T-C = 450 K as well as the onset of the incommensurately modulated structure at 250 K. In the two antiferromagnetic phases below T-N1 = 90 K and T-N2 = 48 K, several infrared-active excitations emerge in the meV range; their frequencies correspond to the maxima in the magnon density of states obtained by INS. At the magnetic phase transitions, these modes display strong anomalies and, for some of them, a transfer of dielectric strength from the higher-frequency phonons is observed. We propose that these modes are electromagnons. Remarkably, at least two of these modes remain active also in the paramagnetic phase; for this reason, we call them paraelectromagn
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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2014
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 - Condensed Matter and Materials Physics
ISSN
1098-0121
e-ISSN
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Volume of the periodical
90
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
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UT code for WoS article
000341266400002
EID of the result in the Scopus database
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