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Durham University

Department of Physics

Staff profile

Publication details for Prof Peter Hatton

Beale, TAW, Bland, SR, Johnson, RD, Hatton, PD, Cezar, JC, Dhesi, SS, Zimmermann, MV, Prabhakaran, D & Boothroyd, AT (2009). Thermally induced rotation of 3d orbital stripes in Pr(Sr0.1Ca0.9)(2)Mn2O7. Physical Review B 79(5): 054433

Author(s) from Durham

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 (0,12,0) above 300 K and (12,0,0) 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 L 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.