Lanthanum manganite
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Lanthanum manganite, LaMnO3, is a mixed oxide of lanthanum and manganese(III). It adopts the perovskite structure.
Lanthanum manganite is usually encountered doped with monovalent or (especially) divalent metal ions such as strontium, to give a compound of formula La1−xMxMnO3, where x is typically 0.1–0.2. This forces an equivalent proportion of the manganese ions (double the portion if M is monovalent) to be oxidized from manganese(III) to manganese(IV). These doped lanthanum manganites show colossal magnetoresistance (CMR).[1]
References
- ↑ Gubkin, M. K.; Perekalina, T. M. Nature of the giant magnetoresistance in ferromagnetic lanthanum manganates. Pis'ma Zh. Eksp. Teor. Fiz., 60 (10), 727–30, <http://www.jetpletters.ac.ru/ps/1357/article_20515.pdf>.
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