Large increase of the Curie temperature by orbital ordering control

Abstract

Using first principle calculations we showed that the Curie temperature of manganites thin films can be increased by far more than an order of magnitude by applying appropriate strains. Our main breakthrough is that the control of the orbital ordering responsible for the spectacular $T_C$ increase cannot be imposed by the substrate only. Indeed, the strains, first applied by the substrate, need to be maintained over the growth direction by the alternation of the manganite layers with another appropriate material. Following these theoretical findings, we synthesized such super-lattices and verified our theoretical predictions.

References in corpus (3)

• Critical thickness and orbital ordering in ultrathin La0.7Sr0.3MnO3 films
• Hybrid exchange-correlation functional for accurate prediction of the electronic and structural properties of ferroelectric oxides
• Optical Conductivity of Manganites: Crossover from Jahn-Teller Small Polaron to Coherent Transport in the Ferromagnetic State

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