Origin of the enhanced ferroelectricity in multiferroic SmMn(2)O(5)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10401069" target="_blank" >RIV/00216208:11320/19:10401069 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=C5gdP1PTK9" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=C5gdP1PTK9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.100.085147" target="_blank" >10.1103/PhysRevB.100.085147</a>
Alternative languages
Result language
angličtina
Original language name
Origin of the enhanced ferroelectricity in multiferroic SmMn(2)O(5)
Original language description
In orthorhombic SmMn2O5 single crystals, Sm3+ crystal-field (CF) excitations are studied by infrared transmission as a function of temperature and under applied magnetic field up to 10 T. These measurements are complemented with the study of Raman-active phonon frequency shifts as a function of temperature between 300 and 5 K. The frequencies of all H-6(j) crystal-field levels of Sm3+ were determined as well as those of H-6(j). At high temperatures, the evolutions of Sm3+ CF excitations exhibit anomalies around the characteristic temperatures, T* similar to 60 K and T-s similar to 120 K and reflect the thermal disorder induced by splitting of the Sm-O bonds in SmMn2O5 that contribute to the frequency and linewidth phonon shifting. At low temperatures, the degeneracy of the ground-state Kramers doublet is lifted (Delta(0) similar to 36 cm(-1)) due to the Sm3(+)-Mn3+ interaction in the ferroelectric phase and strongly enhanced below T c similar to 26 K. The Sm-Mn exchange interaction J(6) is determined and compared to that of Gd-Mn interaction in GdMn2O5. The Sm magnetic moment m(sm )(T) and the Sm contribution to the magnetic susceptibility are also evaluated from Delta(0)(T), indicating that the Sm-Mn interaction is strongly implicated in the magnetic and the ferroelectric orderings below similar to 26 K. The study of the Sm3+ CF excitations as a function of magnetic field reveals twinning in SmMn2O5. This twinning could affect its electric polarization behavior versus magnetic field.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
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
2469-9950
e-ISSN
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Volume of the periodical
100
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
085147
UT code for WoS article
000483347600002
EID of the result in the Scopus database
2-s2.0-85072577091