Exploration of the Electronic Structure of Monoclinic alpha-Eu-2(MoO4)(3): DFT-Based Study and X-ray Photoelectron Spectroscopy
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F16%3A00307646" target="_blank" >RIV/68407700:21220/16:00307646 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1021/acs.jpcc.6b01489" target="_blank" >http://dx.doi.org/10.1021/acs.jpcc.6b01489</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpcc.6b01489" target="_blank" >10.1021/acs.jpcc.6b01489</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Exploration of the Electronic Structure of Monoclinic alpha-Eu-2(MoO4)(3): DFT-Based Study and X-ray Photoelectron Spectroscopy
Popis výsledku v původním jazyce
The powder alpha-Eu-2(MoO4)(3) sample was prepared by the solid-state reaction method. The phase purity of the final powder product was verified by X-ray diffraction analysis. The constituent element core levels and valence band are measured by X-ray photoelectron spectroscopy as a function of Ar+ ion (2.5 keV, 7-8 mu A/cm(2)) bombardment time. The formation of Mo5+ and Mo4+ states at high bombardment times was detected. The Eu-O and Mo-O bonding was considered in comparison with other Eu3+- and Mo6+-containing oxides using binding energy difference parameters. The transparency range obtained for the pure alpha-Eu-2(MoO4)(3) tablet is lambda = 0.41-0.97 mu m, as estimated at the transmission level of 5%. The short-wavelength cut edge in alpha-Eu-2(MoO4)(3) is governed by the direct allowed optical transitions within the band gap of E-g = 3.74 eV (300 K). The band structure of alpha-Eu-2(MoO4)(3) was calculated by ab initio methods and strongly different results were obtained for the spin up/down configurations. The Eu-4f states are located around 2.2 eV and 4.0 eV for spin up (up arrow) and the structures situated at around 6.5 and 5.5 eV for spin down (down arrow) configuration. The calculated spin magnetic moments are in excellent relation to the Slater-Pauling rule and within the Eu sphere the magnetic moment of 4f electrons is, similar to 5.99 mu B.
Název v anglickém jazyce
Exploration of the Electronic Structure of Monoclinic alpha-Eu-2(MoO4)(3): DFT-Based Study and X-ray Photoelectron Spectroscopy
Popis výsledku anglicky
The powder alpha-Eu-2(MoO4)(3) sample was prepared by the solid-state reaction method. The phase purity of the final powder product was verified by X-ray diffraction analysis. The constituent element core levels and valence band are measured by X-ray photoelectron spectroscopy as a function of Ar+ ion (2.5 keV, 7-8 mu A/cm(2)) bombardment time. The formation of Mo5+ and Mo4+ states at high bombardment times was detected. The Eu-O and Mo-O bonding was considered in comparison with other Eu3+- and Mo6+-containing oxides using binding energy difference parameters. The transparency range obtained for the pure alpha-Eu-2(MoO4)(3) tablet is lambda = 0.41-0.97 mu m, as estimated at the transmission level of 5%. The short-wavelength cut edge in alpha-Eu-2(MoO4)(3) is governed by the direct allowed optical transitions within the band gap of E-g = 3.74 eV (300 K). The band structure of alpha-Eu-2(MoO4)(3) was calculated by ab initio methods and strongly different results were obtained for the spin up/down configurations. The Eu-4f states are located around 2.2 eV and 4.0 eV for spin up (up arrow) and the structures situated at around 6.5 and 5.5 eV for spin down (down arrow) configuration. The calculated spin magnetic moments are in excellent relation to the Slater-Pauling rule and within the Eu sphere the magnetic moment of 4f electrons is, similar to 5.99 mu B.
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CF - Fyzikální chemie a teoretická chemie
OECD FORD obor
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Návaznosti výsledku
Projekt
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Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2016
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
JOURNAL OF PHYSICAL CHEMISTRY C
ISSN
1932-7447
e-ISSN
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Svazek periodika
120
Číslo periodika v rámci svazku
19
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
10
Strana od-do
10559-10568
Kód UT WoS článku
000376417500048
EID výsledku v databázi Scopus
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