Charge-ordering transition in iron oxide Fe4O5 involving competing dimer and trimer formation.
2016
Phase transitions in materials are intriguing, and can also be of practical importance. Below ∼150 K, mixed-valent iron oxide Fe4O5 has now been shown to undergo an unusual charge-ordering phase transition that involves the competing formation of iron dimers and trimers, and leads to a significant increase in electrical resistivity.
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