Ferroquadrupolar ordering in a magnetically ordered state in ErNiAl

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00557519" target="_blank" >RIV/68378271:_____/22:00557519 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.105.165147" target="_blank" >https://doi.org/10.1103/PhysRevB.105.165147</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.105.165147" target="_blank" >10.1103/PhysRevB.105.165147</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ferroquadrupolar ordering in a magnetically ordered state in ErNiAl

Popis výsledku v původním jazyce

We conducted ultrasonic measurements to clarify whether a phase transition exists in hexagonal compound ErNiAl below the antiferromagnetic transition at 6 K. We discovered a significant elastic softening of the transverse modulus, C66, accompanied by a significant ultrasonic attenuation toward TQ=3.4 K, which is the temperature of a sharp downward peak in other moduli, indicating a phase transition at TQ. The crystal field analysis reveals that the softening of C66 below 80 K is due to an interlevel Oxy-type quadrupole interaction with a positive quadrupole-quadrupole coupling constant between the ground and excited Kramers doublets. A spontaneous expectation value of Oxy emerges at TQ in our crystal field model with the mean-field approximation. No quadrupolar ordering occurs in a magnetically ordered state because the degeneracy of quadrupoles is lifted by an internal magnetic field of magnetic ordering.

Název v anglickém jazyce

Ferroquadrupolar ordering in a magnetically ordered state in ErNiAl

Popis výsledku anglicky

We conducted ultrasonic measurements to clarify whether a phase transition exists in hexagonal compound ErNiAl below the antiferromagnetic transition at 6 K. We discovered a significant elastic softening of the transverse modulus, C66, accompanied by a significant ultrasonic attenuation toward TQ=3.4 K, which is the temperature of a sharp downward peak in other moduli, indicating a phase transition at TQ. The crystal field analysis reveals that the softening of C66 below 80 K is due to an interlevel Oxy-type quadrupole interaction with a positive quadrupole-quadrupole coupling constant between the ground and excited Kramers doublets. A spontaneous expectation value of Oxy emerges at TQ in our crystal field model with the mean-field approximation. No quadrupolar ordering occurs in a magnetically ordered state because the degeneracy of quadrupoles is lifted by an internal magnetic field of magnetic ordering.

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

2022

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

105

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

165147

Kód UT WoS článku

000805006000004

EID výsledku v databázi Scopus

2-s2.0-85129378610