Kritický bod konkurence různých uspořádání orbitálů a volného páru Bi v oblasti bohaté na bizmut systému Bi-Ca-Mn-O

Kód výsledku v IS VaVaI

RIV/60461373:22310/06:00017010 - isvavai.cz

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Critical point of the competition between different orbital- and Bi lone pair-orderings in the Bi-rich part of the Bi-Ca-Mn-O system

Popis výsledku v původním jazyce

The present paper deals with the evidence of an unprecedented ordering in the Bi-rich part of the Bi-Ca-Mn-O diagram, where the spin glass state is observed at low temperature. The x−1(T) curves of three compounds, corresponding to different Ca/Bi+ Ca ratio varying between 0.37 and 0.25, have been characterized and discussed in correlation with the structural transitions as a function of T. Three different behaviours have been observed for Bi0.63Ca0.37MnO3, Bi0.67Ca0.33MnO3 and Bi0.71Ca0.24MnO3−gama. The anomalies in the x−1(T) curves of Bi0.71Ca0.24MnO3−gama and Bi0.63Ca0.37MnO3 appear to be associated to two different mechanisms, which are not observed in the intermediate Bi0.67Ca0.33MnO3. For the Bi-rich compound, an unprecedented [111]p-type ordering of the perovskite cell is reported, which is associated to a change of the slope in the magnetic curve. Bi0.71Ca0.24MnO3−gama appears at the convergence point of a complex competition between the comp

Název v anglickém jazyce

Critical point of the competition between different orbital- and Bi lone pair-orderings in the Bi-rich part of the Bi-Ca-Mn-O system

Popis výsledku anglicky

The present paper deals with the evidence of an unprecedented ordering in the Bi-rich part of the Bi-Ca-Mn-O diagram, where the spin glass state is observed at low temperature. The x−1(T) curves of three compounds, corresponding to different Ca/Bi+ Ca ratio varying between 0.37 and 0.25, have been characterized and discussed in correlation with the structural transitions as a function of T. Three different behaviours have been observed for Bi0.63Ca0.37MnO3, Bi0.67Ca0.33MnO3 and Bi0.71Ca0.24MnO3−gama. The anomalies in the x−1(T) curves of Bi0.71Ca0.24MnO3−gama and Bi0.63Ca0.37MnO3 appear to be associated to two different mechanisms, which are not observed in the intermediate Bi0.67Ca0.33MnO3. For the Bi-rich compound, an unprecedented [111]p-type ordering of the perovskite cell is reported, which is associated to a change of the slope in the magnetic curve. Bi0.71Ca0.24MnO3−gama appears at the convergence point of a complex competition between the comp

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

GA203/03/0924: Efekty uspořádání a povaha chemické vazby v manganitech na bázi bizmutu

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

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

Název periodika

Solid State Sciences

ISSN

1293-2558

e-ISSN

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Svazek periodika

8

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

1414-1421

Kód UT WoS článku

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EID výsledku v databázi Scopus

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