THz and infrared studies of multiferroic hexagonal Y1-xEuxMnO3 (x = 0 - 0.2) ceramics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F10%3A00353097" target="_blank" >RIV/68378271:_____/10:00353097 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

THz and infrared studies of multiferroic hexagonal Y1-xEuxMnO3 (x = 0 - 0.2) ceramics

Original language description

We report an investigation of hexagonal Y1-xEuxMnO3 ceramics with x=0, 0.1 and 0.2 using infrared and THz spectroscopies in the temperature range between 5 and 900 K. The temperature dependence of the THz permittivity reveals a kink near the antiferromagnetic phase transition temperature TN 70 K giving evidence of a strong spin-lattice coupling. Below TN two absorption peaks were revealed in the THz spectra close to 43 and 73 cm-1. While the first peak corresponds to a sharp antiferromagnetic resonanceexhibiting softening on heating towards TN, the second one may be attributed to an impurity mode or a multiphonon absorption peak. High-temperature THz spectra measured up to 900 K reveal only small gradual increase of the permittivity in agreement witha weak phonon softening observed in the infrared reflectance spectra upon heating. This corresponds to an improper ferroelectric character of the phase transition proposed from first principle calculations by Fennie and Rabe.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

<a href="/en/project/GA202%2F09%2F0682" target="_blank" >GA202/09/0682: Dielectric spectroscopy and lattice dynamics of magnetoelectric multiferroics and strained ferroelectric thin films</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2010

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Phase Transitions

ISSN

0141-1594

e-ISSN

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Volume of the periodical

83

Issue of the periodical within the volume

10-11

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

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UT code for WoS article

000284539500019

EID of the result in the Scopus database

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