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

Beale, TAW; Bland, SR; Johnson, RD; Hatton, PD; Cezar, JC; Dhesi, SS; Zimmermann, MV; Prabhakaran, D; Boothroyd, AT

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.

Citation

Beale, T., Bland, S., Johnson, R., Hatton, P., Cezar, J., Dhesi, S., …Boothroyd, A. (2009). Thermally induced rotation of 3d orbital stripes in Pr(Sr0.1Ca0.9)(2)Mn2O7. Physical review B, 79(5), Article 054433. https://doi.org/10.1103/physrevb.79.054433

• Journal Article Type: Article
• Publication Date: Feb 1, 2009
• Deposit Date: Nov 27, 2012
• Publicly Available Date: Nov 27, 2012
• Journal: Physical review B - Condensed Matter and Materials Physics
• Print ISSN: 1098-0121
• Electronic ISSN: 1550-235X
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 79
• Issue: 5
• Article Number: 054433
• DOI: https://doi.org/10.1103/physrevb.79.054433
• Keywords: Charge, Manganites, LA0.5SR1.5MNO4, LA2-2XSR1+2XMN2O, State.
• Public URL: https://durham-repository.worktribe.com/output/1543069