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Thermally induced rotation of 3d orbital stripes in Pr(Sr0.1Ca0.9)2Mn2O7

DOI: 10.1103/PhysRevB.79.054433 DOI Help

Authors: T. A. W. Beale (Department of Physics, University of Durham) , S. R. Bland (Department of Physics, University of Durham) , R. D. Johnson (Department of Physics, University of Durham) , P. D. Hatton (Department of Physics, University of Durham) , J. C. Cezar (ESRF) , M. V. Zimmermann (Hamburger Synchrotronstrahlungslabor (HASYLAB), Deutsches Elektronensynchrotron (DESY)) , D. Prabhakaran (Department of Physics, University of Oxford) , A. Boothroyd (Department of Physics, University of Oxford) , S. S. Dhesi (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 79 (5) , PAGES 79 (5)

State: Published (Approved)
Published: February 2009
Diamond Proposal Number(s): 641

Abstract: We have investigated orbital ordering in the bilayer manganite, Pr(Sr0.1Ca0.9)2Mn2O7, using synchrotron x-ray diffraction techniques, in particular resonant soft x-ray diffraction. Diffraction signals are observed at (0, 1 2 ,0) above 300 K and ( 1 2 ,0,0) below 300 K, corresponding to orbital stripes along the a and b axes, respectively. The previously observed transition at 300 K is evidence of a rotation of the orientation of the 3d orbital stripes. Large resonances of the orbital signals are observed at the Mn‚ÄČL edges, with a complex dependence on incident photon energy indicative of a weakly Jahn-Teller distorted system. A structural transition observed at 92 K is found not to involve a further change in the orbital order.

Subject Areas: Materials, Physics


Instruments: I06-Nanoscience

Other Facilities: European Synchrotron Radiation Facility; HASYLAB

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