Can the ferroelectric soft mode trigger an antiferromagnetic phase transition?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00570671" target="_blank" >RIV/68378271:_____/23:00570671 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jeurceramsoc.2022.12.067" target="_blank" >https://doi.org/10.1016/j.jeurceramsoc.2022.12.067</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2022.12.067" target="_blank" >10.1016/j.jeurceramsoc.2022.12.067</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Can the ferroelectric soft mode trigger an antiferromagnetic phase transition?

Popis výsledku v původním jazyce

Type-II multiferroics, where spin interactions induce a ferroelectric polarization, are interesting due to large magnetoelectric coupling. We report on a new type of multiferroicity in the quadruple-perovskite BiMn3Cr4O12, where an antiferromagnetic phase is induced by the structural change at the ferroelectric phase transition. The displacive nature of the ferroelectric phase transition at 125 K, with a crossover to an order-disorder mechanism, is evidenced by a polar soft phonon in the THz range and a central mode. Dielectric and pyroelectric studies show that the ferroelectric critical temperature corresponds to the previously reported Néel temperature of the Cr3+ spins. An increase in ferroelectric polarization is observed below 48 K, coinciding with the Néel temperature of the Mn3+ spins. This increase in polarization is attributed to an enhanced magnetoelectric coupling, as no change in the crystal symmetry below 48 K is detected from infrared and Raman spectra.

Název v anglickém jazyce

Can the ferroelectric soft mode trigger an antiferromagnetic phase transition?

Popis výsledku anglicky

Type-II multiferroics, where spin interactions induce a ferroelectric polarization, are interesting due to large magnetoelectric coupling. We report on a new type of multiferroicity in the quadruple-perovskite BiMn3Cr4O12, where an antiferromagnetic phase is induced by the structural change at the ferroelectric phase transition. The displacive nature of the ferroelectric phase transition at 125 K, with a crossover to an order-disorder mechanism, is evidenced by a polar soft phonon in the THz range and a central mode. Dielectric and pyroelectric studies show that the ferroelectric critical temperature corresponds to the previously reported Néel temperature of the Cr3+ spins. An increase in ferroelectric polarization is observed below 48 K, coinciding with the Néel temperature of the Mn3+ spins. This increase in polarization is attributed to an enhanced magnetoelectric coupling, as no change in the crystal symmetry below 48 K is detected from infrared and Raman spectra.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of the European Ceramic Society

ISSN

0955-2219

e-ISSN

1873-619X

Svazek periodika

43

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

2479-2487

Kód UT WoS článku

000935687800001

EID výsledku v databázi Scopus

2-s2.0-85145723998