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Title: | Double stripe ordering in Nd0.5Sr0.5MnO3 determined by resonant soft x-ray scattering |
Authors: | Herrero Martín, Javier CSIC ORCID; García, Joaquín CSIC; Subías, G. CSIC ORCID; Blasco, Javier CSIC ORCID; Sánchez, María Concepción CSIC ORCID; Stanescu, Stefan | Keywords: | Neodymium compounds Strontium compounds X-ray scattering Colossal magnetoresistance |
Issue Date: | Jun-2006 | Publisher: | American Physical Society | Citation: | Physical Review - Section B - Condensed Matter 73(22): 224407.1-224407.7 (2006) | Abstract: | We have studied the low-temperature ordered phase of Nd0.5Sr0.5MnO3 by resonant soft x-ray scattering at the Mn L2,3 edges. Strong resonances were observed at (0 0) and ( 0 0) reflections, which are resolved in momentum space. Azimuthal scans reveal a periodicity for both resonances, the minimum intensity being almost zero. The two reflections show a very different energy dependence which extends in the whole energy region of the Mn L-edge. The (0 0) reflection originates from the anisotropy induced on the d-symmetry projected density of states owing to the local tetragonal distortion at one of the two crystallographic inequivalent Mn sites (the so-called Mn3+ ions in the conventional ionic description). This is similar to the resonance observed at the Mn K edge. We propose that the ( 0 0) reflection, which has not its counterpart either on the Mn K-edge resonant scattering or on the magnetic scattering, is originated by anisotropy of the d-symmetry projected density of the so-called Mn4+ sublattice. In this way, the latter reflection could denote a pure orbital ordering in this sublattice. | Description: | 7 pages, 8 figures.-- PACS number(s): 75.47.Lx, 78.70.Ck, 71.30.+h | Publisher version (URL): | http://dx.doi.org/10.1103/PhysRevB.73.224407 | URI: | http://hdl.handle.net/10261/19786 | DOI: | 10.1103/PhysRevB.73.224407 | ISSN: | 1539-3755 |
Appears in Collections: | (ICMA) Artículos |
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