ANSTO Publications Online: Resonant soft x-ray powder diffraction study to determine the orbital ordering in A-site-ordered SmBaMn2O6.

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/1073

Title:	Resonant soft x-ray powder diffraction study to determine the orbital ordering in A-site-ordered SmBaMn2O6.
Authors:	Garcia-Fernandez, M Staub, U Bodenthin, Y Lawrence, SM Mulders, AM Buckley, CE Weyeneth, S Pomjakushina, E Conder, K
Keywords:	Jahn-Teller Effect Scattering Diffraction Polarization Energy Ferromagnetic Resonance
Issue Date:	Feb-2008
Publisher:	American Physical Society
Citation:	Garcia-Fernandez, M., Staub, U., Bodenthin, Y., Lawrence, S. M., Mulders, A. M., Buckley, C. E., et al. (2008). Resonant soft x-ray powder diffraction study to determine the orbital ordering in A-site-ordered SmBaMn2O6. Physical Review B, 77(6), 060402.
Abstract:	Soft x-ray resonant powder diffraction has been performed at the Mn L-2,L-3 edges of A-site-ordered SmBaMn2O6. The energy and polarization dependences of the (1/4 1/4 0) reflection provide direct evidence for a (x(2) - z(2))/(y(2) - z(2))-type orbital ordering in contrast to single-layer manganite. The temperature dependence of the reflection indicates an orbital reorientation transition at approximate to 210 K, below which the charge- and orbital-ordered MnO2 sheets show AAAA-type of stacking. The concurring reduction of the ferromagnetic superexchange correlations leads to further charge localization. © 2008, American Physical Society
URI:	http://dx.doi.org/10.1103/PhysRevB.77.060402 http://apo.ansto.gov.au/dspace/handle/10238/1073
ISSN:	1098-0121
Appears in Collections:	Journal Articles

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