Two displacive ferroelectric phase transitions in multiferroic quadruple perovskite BiMn7O12
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00585826" target="_blank" >RIV/68378271:_____/24:00585826 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/24:10483748
Result on the web
<a href="https://doi.org/10.1103/PhysRevB.109.134111" target="_blank" >https://doi.org/10.1103/PhysRevB.109.134111</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.109.134111" target="_blank" >10.1103/PhysRevB.109.134111</a>
Alternative languages
Result language
angličtina
Original language name
Two displacive ferroelectric phase transitions in multiferroic quadruple perovskite BiMn7O12
Original language description
We report on the microwave, terahertz (THz), infrared, and Raman spectroscopic studies of BiMn7O12 ceramics, shedding more light onto the nature of two structural phase transitions and their possible relation with ferroelectricity in this compound. We observed a softening of one polar phonon in the THz range on cooling towards 460 and 300 K. The soft phonon causes dielectric anomalies typical for displacive ferroelectric phase transitions. Microwave measurements performed at 5.8 GHz up to 400 K qualitatively confirmed not only the dielectric anomaly at 300 K, but also revealed two other weak dielectric anomalies near the magnetic phase transitions at 60 and 28 K. This evidences the multiferroic nature of the low-temperature phases, although the relatively high conductivity in the kHz and Hz spectral range prevented us from directly measuring the permittivity and ferroelectric polarization.
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
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
2024
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
2469-9969
Volume of the periodical
109
Issue of the periodical within the volume
13
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
134111
UT code for WoS article
001247343700005
EID of the result in the Scopus database
2-s2.0-85191581957