Cooperative enhancement of in-plane orbital ordering by oxygen deficiency and in-plane tensile strain in La0.7Sr0.3MnO3-delta thin films

@article{ ISI:000250409800016,
Author = {Aruta, C. and Balestrino, G. and Tebano, A. and Ghiringhelli, G. and
   Brookes, N. B.},
Title = {{Cooperative enhancement of in-plane orbital ordering by oxygen
   deficiency and in-plane tensile strain in La0.7Sr0.3MnO3-delta thin
   films}},
Journal = {{EPL}},
Year = {{2007}},
Volume = {{80}},
Number = {{3}},
Abstract = {{The development of in-plane orbital ordering with oxygen deficiency is
   investigated in epitaxially strained thin films of La0.7Sr0.3MnO3-delta
   grown under in-plane tensile strain on SrTiO3 substrates. The orbital
   character of 3d states is directly probed by linear dichroism in X-ray
   absorption spectroscopy at the Mn L-2,L-3 and O K edges. The electrical
   transport measurements show a rapid decrease of the metal-insulator
   transition temperature and an increase of the polaronic activation
   energy when reducing the oxygen content. The diffraction measurements
   show a contraction of the average out-of-plane lattice parameter due to
   an enhancement of the regular distribution of the Mn3+ distorted
   octahedra in oxygen-deficient films. We show that the oxygen deficiency
   and the in-plane tensile strain cooperate to stabilize the in-plane
   orbital occupation: the oxygen deficiency is responsible for the
   increased number of Jahn-Teller distorted octahedra and the in-plane
   tensile strain drives the arrangement of such octahedra, favoring the
   in-plane confinement of the e(g) orbitals. Linear dichroism in X-ray
   absorption also demonstrates that the Mn 3d/O 2p hybridization changes
   little with the oxygen content, thus confirming that the in-plane
   orbital ordering is the main factor influencing the transport
   properties. Copyright (C) EPLA, 2007}},
Publisher = {{EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY}},
Address = {{6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Aruta, C (Corresponding Author), Univ Naples Federico II, CNR INFM Cohenrentia, Piazzale Tecchio 80, I-80125 Naples, Italy.
   Univ Naples Federico II, CNR INFM Cohenrentia, I-80125 Naples, Italy.
   Univ Naples Federico II, Dipartimento Sci Fisiche, I-80125 Naples, Italy.
   Univ Roma Tor Vergata, CNR INFM Coherentia, I-00133 Rome, Italy.
   Univ Roma Tor Vergata, Dipartimento Ingn Meccan, I-00133 Rome, Italy.
   Politecn Milan, CNR INFM Coherentia, I-20133 Milan, Italy.
   Politecn Milan, Dipartmento Fis, I-20133 Milan, Italy.
   European Synchrotron Radiat Facil, F-38043 Grenoble, France.}},
DOI = {{10.1209/0295-5075/80/37003}},
Article-Number = {{37003}},
ISSN = {{0295-5075}},
EISSN = {{1286-4854}},
Keywords-Plus = {{X-RAY-SCATTERING; PHASE-DIAGRAM; MANGANITES; CHARGE; DICHROISM; OXIDES}},
Research-Areas = {{Physics}},
Web-of-Science-Categories  = {{Physics, Multidisciplinary}},
Author-Email = {{aruta@na.infn.it}},
ResearcherID-Numbers = {{Brookes, Nicholas B/C-6718-2019
   Aruta, Carmela/L-2957-2015
   Ghiringhelli, Giacomo/D-1159-2014
   }},
ORCID-Numbers = {{Brookes, Nicholas B/0000-0002-1342-9530
   Aruta, Carmela/0000-0002-6917-6667
   Ghiringhelli, Giacomo/0000-0003-0867-7748
   TEBANO, ANTONELLO/0000-0002-0229-671X}},
Number-of-Cited-References = {{27}},
Times-Cited = {{18}},
Usage-Count-Last-180-days = {{0}},
Usage-Count-Since-2013 = {{21}},
Journal-ISO = {{EPL}},
Doc-Delivery-Number = {{223XQ}},
Unique-ID = {{ISI:000250409800016}},
DA = {{2020-12-22}},
}