Charge/orbital ordering vs. Jahn-Teller distortion in La0.5Sr1.5MnO4

Charge/orbital ordering vs. Jahn-Teller distortion in La0.5Sr1.5MnO4

Temperature dependences of a magnetic and an orbital Bragg reflection at the Mn L2,3 edges of La0.5Sr1.5MnO4 have been collected. The temperature evolution of the orbital reflection depends strongly on the X-ray energy and reflects the different order parameters, which are assigned to orbitals and J...

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Veröffentlicht in:Europhysics letters 2006-12, Vol.76 (5), p.926-932
Hauptverfasser: Staub, U, Scagnoli, V, Mulders, A. M, Janousch, M, Honda, Z, Tonnerre, J. M
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container_issue 5
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creator Staub, U
Scagnoli, V
Mulders, A. M
Janousch, M
Honda, Z
Tonnerre, J. M
description Temperature dependences of a magnetic and an orbital Bragg reflection at the Mn L2,3 edges of La0.5Sr1.5MnO4 have been collected. The temperature evolution of the orbital reflection depends strongly on the X-ray energy and reflects the different order parameters, which are assigned to orbitals and Jahn-Teller distortions. The Jahn-Teller order parameter saturates at 150 K, whereas the orbital order parameter gradually increases. These results are discussed in context with the possible driving forces, the orbital-orbital super exchange and the Jahn-Teller strain field interaction.
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title Charge/orbital ordering vs. Jahn-Teller distortion in La0.5Sr1.5MnO4
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