Magnetic properties and crystal field splitting of the rare-earth pyrochlore Er2Ir2O7

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10415099" target="_blank" >RIV/00216208:11320/20:10415099 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Xp_k9sT9cU" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Xp_k9sT9cU</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.102.054428" target="_blank" >10.1103/PhysRevB.102.054428</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetic properties and crystal field splitting of the rare-earth pyrochlore Er2Ir2O7

Popis výsledku v původním jazyce

The effects on the rare-earth crystal-field-splitting schemes of incorporation of large spin-orbit coupling (5d) ions, such as Ir4+, into the rare-earth pyrochlores are largely unknown. We report on the preparation, specific heat, magnetization, and inelastic neutron-scattering study of Er2Ir2O7 pyrochlore. An anomaly in specific heat and bifurcation of zero-field cooled and field cooled magnetization indicates an ordering of the Ir sublattice below 140 K, in good agreement with other rare-earth pyrochlore iridates. The Er sublattice ordering below 2 K can be considered short range as well, following the development of specific-heat and magnetization data down to low temperatures. The inelastic neutron scattering allowed us to unambiguously determine the crystal-field (CF) eigenenergies and parameters of Er2Ir2O7, which are dictated dominantly by nearest-neighbor anions (the oxygen cage around the Er cation). The influence of the magnetic iridium cations on the erbium CF scheme is rather moderate despite the strong spin-orbit coupling expected in a 5d metal, which is evident when comparing the energy spectra of this iridate and other 3d- or 4d-metal containing erbium pyrochlores. The determined CF parameters were subsequently utilized for calculations of magnetization and specific-heat CF contributions, leading to an excellent agreement with experimental data.

Název v anglickém jazyce

Magnetic properties and crystal field splitting of the rare-earth pyrochlore Er2Ir2O7

Popis výsledku anglicky

The effects on the rare-earth crystal-field-splitting schemes of incorporation of large spin-orbit coupling (5d) ions, such as Ir4+, into the rare-earth pyrochlores are largely unknown. We report on the preparation, specific heat, magnetization, and inelastic neutron-scattering study of Er2Ir2O7 pyrochlore. An anomaly in specific heat and bifurcation of zero-field cooled and field cooled magnetization indicates an ordering of the Ir sublattice below 140 K, in good agreement with other rare-earth pyrochlore iridates. The Er sublattice ordering below 2 K can be considered short range as well, following the development of specific-heat and magnetization data down to low temperatures. The inelastic neutron scattering allowed us to unambiguously determine the crystal-field (CF) eigenenergies and parameters of Er2Ir2O7, which are dictated dominantly by nearest-neighbor anions (the oxygen cage around the Er cation). The influence of the magnetic iridium cations on the erbium CF scheme is rather moderate despite the strong spin-orbit coupling expected in a 5d metal, which is evident when comparing the energy spectra of this iridate and other 3d- or 4d-metal containing erbium pyrochlores. The determined CF parameters were subsequently utilized for calculations of magnetization and specific-heat CF contributions, leading to an excellent agreement with experimental data.

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

Physical Review B

ISSN

2469-9950

e-ISSN

—

Svazek periodika

2020

Číslo periodika v rámci svazku

102

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

000561713800002

EID výsledku v databázi Scopus

2-s2.0-85089873800