Crystal field driven magnetoelectricity in the triangular quantum magnet CeMgAl11O19

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00644502" target="_blank" >RIV/68378271:_____/25:00644502 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/25:10507516

Výsledek na webu

<a href="https://hdl.handle.net/11104/0374475" target="_blank" >https://hdl.handle.net/11104/0374475</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/c3hd-pwby" target="_blank" >10.1103/c3hd-pwby</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Crystal field driven magnetoelectricity in the triangular quantum magnet CeMgAl11O19

Popis výsledku v původním jazyce

We report dielectric and magnetoelectric studies of single-crystalline CeMgAl11O19, a Kramers triangular magnet embedded in a polarizable hexaaluminate lattice. In zeromagnetic field, the permittivity ε(T) follows the Barrett law of a quantum paraelectric down to ∼25K, below which a broad minimum develops near 3K without evidence of static ferroelectric or magnetic order. Application of magnetic fields up to 9 T shifts this minimum to higher temperatures and broadens it, evidencing a tunable magnetoelectric response. The magnetoelectric coupling was characterized using results from magnetization measurements. The anomaly temperature T∗, extracted from the local minimum of ε(T), exhibits a linear dependence on the squared magnetization M2, consistent with the biquadratic magnetoelectric coupling allowed in centrosymmetric systems. This magnetoelectric effect, mediated by spin-orbit-entangled Kramers doublets interacting with a frustrated antipolar liquid, establishes CeMgAl11O19 as a prototype for exploring quantum magnetoelectricity in frustrated systems.

Název v anglickém jazyce

Crystal field driven magnetoelectricity in the triangular quantum magnet CeMgAl11O19

Popis výsledku anglicky

We report dielectric and magnetoelectric studies of single-crystalline CeMgAl11O19, a Kramers triangular magnet embedded in a polarizable hexaaluminate lattice. In zeromagnetic field, the permittivity ε(T) follows the Barrett law of a quantum paraelectric down to ∼25K, below which a broad minimum develops near 3K without evidence of static ferroelectric or magnetic order. Application of magnetic fields up to 9 T shifts this minimum to higher temperatures and broadens it, evidencing a tunable magnetoelectric response. The magnetoelectric coupling was characterized using results from magnetization measurements. The anomaly temperature T∗, extracted from the local minimum of ε(T), exhibits a linear dependence on the squared magnetization M2, consistent with the biquadratic magnetoelectric coupling allowed in centrosymmetric systems. This magnetoelectric effect, mediated by spin-orbit-entangled Kramers doublets interacting with a frustrated antipolar liquid, establishes CeMgAl11O19 as a prototype for exploring quantum magnetoelectricity in frustrated systems.

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

2025

Kód důvěrnosti údajů

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

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

2469-9969

Svazek periodika

112

Číslo periodika v rámci svazku

22

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

224431

Kód UT WoS článku

001651613500004

EID výsledku v databázi Scopus

2-s2.0-105025432659