Metal valences in electron-doped (Sr,La)2FeTaO6 double perovskite: A 57Fe Mössbauer spectroscopy study

E. L. Rautama; J. Lindén; H. Yamauchi; M. Karppinen

doi:10.1016/j.jssc.2006.10.034

Metal valences in electron-doped (Sr,La)₂FeTaO₆ double perovskite: A ⁵⁷Fe Mössbauer spectroscopy study

E. L. Rautama
, J. Lindén
, H. Yamauchi
, M. Karppinen^*

^*Korresponderande författare för detta arbete

Forskningsoutput: Tidskriftsbidrag › Artikel › Vetenskaplig › Peer review

6 Citeringar (Scopus)

Sammanfattning

Substitution of divalent Sr by trivalent La is found to affect the valence states of both of the two B-site cations, Fe and Ta, in the double perovskite oxide (Sr_1-xLa_x)₂FeTaO₆. Moreover, it improves the degree of order of these cations. From ⁵⁷Fe Mössbauer spectra the average Fe valence was found to decrease with increasing La substitution level, x. However, the valence of Fe decreased less than expected if the valence of Ta was assumed to remain constant. Hence, we conclude that also the valence of Ta decreases.

Originalspråk	Engelska
Sidor (från-till)	440-445
Antal sidor	6
Tidskrift	Journal of Solid State Chemistry
Volym	180
Nummer	2
DOI	https://doi.org/10.1016/j.jssc.2006.10.034
Status	Publicerad - feb. 2007
MoE-publikationstyp	A1 Tidskriftsartikel-refererad

Finansiering

This work was supported by a Grant-in-aid for Scientific Research (no. 15206002) from Japan Society for the Promotion of Science, and also by Academy of Finland (Decision 110433). E.-L.R. acknowledges the support from Jenny and Antti Wihuri Foundation.

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10.1016/j.jssc.2006.10.034

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@article{52150ec944584ba78e2b0fed670e0087,

title = "Metal valences in electron-doped (Sr,La)2FeTaO6 double perovskite: A 57Fe M{\"o}ssbauer spectroscopy study",

abstract = "Substitution of divalent Sr by trivalent La is found to affect the valence states of both of the two B-site cations, Fe and Ta, in the double perovskite oxide (Sr1-xLax)2FeTaO6. Moreover, it improves the degree of order of these cations. From 57Fe M{\"o}ssbauer spectra the average Fe valence was found to decrease with increasing La substitution level, x. However, the valence of Fe decreased less than expected if the valence of Ta was assumed to remain constant. Hence, we conclude that also the valence of Ta decreases.",

keywords = "Cation ordering, Cation valences, Double-perovskite oxide, M{\"o}ssbauer spectroscopy",

author = "Rautama, \{E. L.\} and J. Lind{\'e}n and H. Yamauchi and M. Karppinen",

year = "2007",

month = feb,

doi = "10.1016/j.jssc.2006.10.034",

language = "English",

volume = "180",

pages = "440--445",

journal = "Journal of Solid State Chemistry",

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TY - JOUR

T1 - Metal valences in electron-doped (Sr,La)2FeTaO6 double perovskite

T2 - A 57Fe Mössbauer spectroscopy study

AU - Rautama, E. L.

AU - Lindén, J.

AU - Yamauchi, H.

AU - Karppinen, M.

PY - 2007/2

Y1 - 2007/2

N2 - Substitution of divalent Sr by trivalent La is found to affect the valence states of both of the two B-site cations, Fe and Ta, in the double perovskite oxide (Sr1-xLax)2FeTaO6. Moreover, it improves the degree of order of these cations. From 57Fe Mössbauer spectra the average Fe valence was found to decrease with increasing La substitution level, x. However, the valence of Fe decreased less than expected if the valence of Ta was assumed to remain constant. Hence, we conclude that also the valence of Ta decreases.

AB - Substitution of divalent Sr by trivalent La is found to affect the valence states of both of the two B-site cations, Fe and Ta, in the double perovskite oxide (Sr1-xLax)2FeTaO6. Moreover, it improves the degree of order of these cations. From 57Fe Mössbauer spectra the average Fe valence was found to decrease with increasing La substitution level, x. However, the valence of Fe decreased less than expected if the valence of Ta was assumed to remain constant. Hence, we conclude that also the valence of Ta decreases.

KW - Cation ordering

KW - Cation valences

KW - Double-perovskite oxide

KW - Mössbauer spectroscopy

UR - https://www.scopus.com/pages/publications/33846596568

U2 - 10.1016/j.jssc.2006.10.034

DO - 10.1016/j.jssc.2006.10.034

M3 - Article

AN - SCOPUS:33846596568

SN - 0022-4596

VL - 180

SP - 440

EP - 445

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 2

ER -