Inverse Jahn-Teller transition in bimetallic oxalates

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Abstract

Because of the competition between the spin-orbit coupling and the Jahn-Teller (JT) energies in Fe(II)Fe(III) bimetallic oxalates, we theoretically predict that an undistorted phase with C3 symmetry about each Fe site may be recovered at low temperatures. Both lower and upper JT transitions bracketing the ferrimagnetic transition temperature Tc are predicted for compounds that exhibit magnetic compensation. Comparisons with recent measurements and first-principles calculations provide strong evidence for the inverse JT transition below Tc.

Original languageEnglish
Article number116402
JournalPhysical Review Letters
Volume101
Issue number11
DOIs
StatePublished - Sep 12 2008

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