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- Title
Wide-Range Tuning of the Mo Oxidation State in La1-xSrxFe2/3Mo1/3O3 Perovskites.
- Authors
Istomin, Sergey Ya.; Chernova, Varvara V.; Antipov, Evgeny V.; Lobanov, Maxim V.; Bobrikov, Ivan A.; Yushankhai, Viktor Yu.; Balagurov, Anatoly M.; Hsu, K. Y.; Lin, J. ‐Y.; Chen, J. M.; Lee, J. F.; Volkova, Olga S.; Vasiliev, Alexander N.
- Abstract
La1- xSr xFe2/3Mo1/3O3 (0 ≤ x ≤ 1) perovskites allow exceptionally wide tuning of the Mo oxidation state from +3 ( x = 0) to +6 ( x = 1) with the FeIII oxidation state virtually unchanged. The end members of this series show antiferromagnetic ordering in LaFe2/3Mo1/3O3 at TN = 520 K and ferrimagnetic ordering in SrFe2/3Mo1/3O3 at TC = 420 K. The crucial role of electron correlations in the Mo 4d shell suggests that LaFe2/3Mo1/3O3 with a half-filled band is a Mott insulator, whereas SrFe2/3Mo1/3O3 is a band insulator. In both cases, the magnetic structure is dictated by antiferromagnetic superexchange between localized magnetic moments. At intermediate compositions, an interplay of antiferromagnetic-superexchange and double-exchange interactions results in nonmonotonous variations of both the magnetic-ordering temperature and saturation magnetization.
- Subjects
OXIDATION states; OXIDATION; PEROVSKITE; ANTIFERROMAGNETISM; ANTIFERROMAGNETIC materials
- Publication
European Journal of Inorganic Chemistry, 2016, Vol 2016, Issue 18, p2942
- ISSN
1434-1948
- Publication type
Article
- DOI
10.1002/ejic.201600020