Characterization and Magnetic Properties of Heavy Rare-Earth A2Ir2O7 Pyrochlore Iridates, the Case of Tm2Ir2O7

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10415103" target="_blank" >RIV/00216208:11320/20:10415103 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Qhn.MEL5xD" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Qhn.MEL5xD</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.0c04847" target="_blank" >10.1021/acs.jpcc.0c04847</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Characterization and Magnetic Properties of Heavy Rare-Earth A2Ir2O7 Pyrochlore Iridates, the Case of Tm2Ir2O7

Popis výsledku v původním jazyce

The magnetic properties of newly prepared Tm2Ir2O7 were investigated by means of magnetization and specific heat measurements and compared to the properties of other heavy rare-earth pyrochlore iridates. A bifurcation of zero-field-cooled and field-cooled magnetization coinciding with the onset of the specific heat anomaly indicated the magnetic ordering of the Ir sublattice, in agreement with studies on other pyrochlore iridates. The phase diagram depicting the ordering/metal-insulator-transition temperature dependent on the rare-earth ionic radius was updated and completed. Magnetic dc susceptibilities and magnetic contributions to the specific heat of Er, Tm, and Yb analogues were well described by crystal field parameters and eigenenergies, previously reported for Er2Ir2O7 and Yb2Ir2O7. The crystal field parameters for, the so-far-unstudied, Tm2Ir2O7 were calculated by scaling the Er2Ir2O7 parameters employing appropriate Stevens factors for Er3+ and Tm3+. Iridates with the Kramers&apos; Er3+ and Yb3+ ions revealed a splitting of the ground-state doublet, leading to a broad anomaly in specific heat at around 2 K and 3 K, respectively. The previously reported low value of magnetic moment in Yb2Ir2O7 was confirmed by magnetization measurements. The nonmagnetic ground-state crystal-field singlet in Tm2Ir2O7 dictated by Tm trigonal Wyckoff position was confirmed by both evolution of specific heat at low temperature and temperature dependence of the magnetic entropy

Název v anglickém jazyce

Characterization and Magnetic Properties of Heavy Rare-Earth A2Ir2O7 Pyrochlore Iridates, the Case of Tm2Ir2O7

Popis výsledku anglicky

The magnetic properties of newly prepared Tm2Ir2O7 were investigated by means of magnetization and specific heat measurements and compared to the properties of other heavy rare-earth pyrochlore iridates. A bifurcation of zero-field-cooled and field-cooled magnetization coinciding with the onset of the specific heat anomaly indicated the magnetic ordering of the Ir sublattice, in agreement with studies on other pyrochlore iridates. The phase diagram depicting the ordering/metal-insulator-transition temperature dependent on the rare-earth ionic radius was updated and completed. Magnetic dc susceptibilities and magnetic contributions to the specific heat of Er, Tm, and Yb analogues were well described by crystal field parameters and eigenenergies, previously reported for Er2Ir2O7 and Yb2Ir2O7. The crystal field parameters for, the so-far-unstudied, Tm2Ir2O7 were calculated by scaling the Er2Ir2O7 parameters employing appropriate Stevens factors for Er3+ and Tm3+. Iridates with the Kramers&apos; Er3+ and Yb3+ ions revealed a splitting of the ground-state doublet, leading to a broad anomaly in specific heat at around 2 K and 3 K, respectively. The previously reported low value of magnetic moment in Yb2Ir2O7 was confirmed by magnetization measurements. The nonmagnetic ground-state crystal-field singlet in Tm2Ir2O7 dictated by Tm trigonal Wyckoff position was confirmed by both evolution of specific heat at low temperature and temperature dependence of the magnetic entropy

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

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Svazek periodika

124

Číslo periodika v rámci svazku

37

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

20367-20376

Kód UT WoS článku

000574908200050

EID výsledku v databázi Scopus

2-s2.0-85092340195