by Orgiani, P., Galdi, A., Aruta, C., Cataudella, V., De Filippis, G., Perroni, C. A., Ramaglia, V. Marigliano, Ciancio, R., Brookes, N. B., Moretti Sala, M. and Ghiringhelli, G. and Maritato, L.
Abstract:
Double-exchange (DE) mechanisms in RE(1-x)AE(x)MnO(3) manganites (where RE is a trivalent rare-earth ion and AE is a divalent alkali-earth ion) relies on the strong exchange interaction between two Mn3+ and Mn4+ ions through interfiling oxygen 2p states. Nevertheless, the role of RE and AE ions has ever been considered “silent” with respect to the DE conducting mechanisms. Here we show that a new path for DE mechanism is indeed possible by partially replacing the RE-AE elements by Mn2+ ions, in La-deficient LaxMnO3-delta thin films. X-ray absorption spectroscopy demonstrated the relevant presence of Mn2+ ions, which is unambiguously proved to be substituted at La site by resonant inelastic x-ray scattering. Mn2+ is proved to be directly correlated with the enhanced magnetotransport properties because of an additional hopping mechanism trough interfiling Mn2+ ions. Such a scenario has been theoretically confirmed by calculations within the effective single-band model. The use of Mn2+ both as a doping element and an ion electronically involved in the conduction mechanism reveals an unconventional phenomenon in transport properties of manganites. More important, such a strategy might be also pursed in other strongly correlated materials.
Reference:
Multiple double-exchange mechanism by Mn2+ doping in manganite compounds (Orgiani, P., Galdi, A., Aruta, C., Cataudella, V., De Filippis, G., Perroni, C. A., Ramaglia, V. Marigliano, Ciancio, R., Brookes, N. B., Moretti Sala, M. and Ghiringhelli, G. and Maritato, L.), In PHYSICAL REVIEW B, AMER PHYSICAL SOC, volume 82, 2010.
Bibtex Entry:
@article{ ISI:000284527000005, Author = {Orgiani, P. and Galdi, A. and Aruta, C. and Cataudella, V. and De Filippis, G. and Perroni, C. A. and Ramaglia, V. Marigliano and Ciancio, R. and Brookes, N. B. and Moretti Sala, M. and Ghiringhelli, G. and Maritato, L.}, Title = {{Multiple double-exchange mechanism by Mn2+ doping in manganite compounds}}, Journal = {{PHYSICAL REVIEW B}}, Year = {{2010}}, Volume = {{82}}, Number = {{20}}, Month = {{NOV 23}}, Abstract = {{Double-exchange (DE) mechanisms in RE(1-x)AE(x)MnO(3) manganites (where RE is a trivalent rare-earth ion and AE is a divalent alkali-earth ion) relies on the strong exchange interaction between two Mn3+ and Mn4+ ions through interfiling oxygen 2p states. Nevertheless, the role of RE and AE ions has ever been considered ``silent{''} with respect to the DE conducting mechanisms. Here we show that a new path for DE mechanism is indeed possible by partially replacing the RE-AE elements by Mn2+ ions, in La-deficient LaxMnO3-delta thin films. X-ray absorption spectroscopy demonstrated the relevant presence of Mn2+ ions, which is unambiguously proved to be substituted at La site by resonant inelastic x-ray scattering. Mn2+ is proved to be directly correlated with the enhanced magnetotransport properties because of an additional hopping mechanism trough interfiling Mn2+ ions. Such a scenario has been theoretically confirmed by calculations within the effective single-band model. The use of Mn2+ both as a doping element and an ion electronically involved in the conduction mechanism reveals an unconventional phenomenon in transport properties of manganites. More important, such a strategy might be also pursed in other strongly correlated materials.}}, Publisher = {{AMER PHYSICAL SOC}}, Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}}, Type = {{Article}}, Language = {{English}}, Affiliation = {{Orgiani, P (Corresponding Author), CNR SPIN, I-84084 Fisciano, SA, Italy. Orgiani, P.; Galdi, A.; Maritato, L., CNR SPIN, I-84084 Fisciano, SA, Italy. Orgiani, P.; Maritato, L., Univ Salerno, Dept Math & Informat, I-84084 Fisciano, SA, Italy. Galdi, A., Univ Salerno, Dept Phys, I-84084 Fisciano, SA, Italy. Aruta, C.; Cataudella, V.; De Filippis, G.; Perroni, C. A.; Ramaglia, V. Marigliano, CNR SPIN, I-80126 Naples, Italy. Aruta, C.; Cataudella, V.; De Filippis, G.; Perroni, C. A.; Ramaglia, V. Marigliano, Univ Naples Federico II, Dept Phys, I-80126 Naples, Italy. Ciancio, R., CNR IOM, TASC Lab, I-34149 Trieste, Italy. Brookes, N. B., European Synchrotron Radiat Facil, F-38043 Grenoble, France. Moretti Sala, M.; Ghiringhelli, G., CNR SPIN, I-20133 Milan, Italy. Moretti Sala, M.; Ghiringhelli, G., Politecn Milan, Dept Phys, I-20133 Milan, Italy.}}, DOI = {{10.1103/PhysRevB.82.205122}}, Article-Number = {{205122}}, ISSN = {{2469-9950}}, EISSN = {{2469-9969}}, Research-Areas = {{Materials Science; Physics}}, Web-of-Science-Categories = {{Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter}}, Author-Email = {{pasquale.orgiani@spin.cnr.it}}, ResearcherID-Numbers = {{Aruta, Carmela/L-2957-2015 Sala, Marco Moretti/H-1034-2014 Orgiani, Pasquale/E-7146-2013 Cataudella, Vittorio/B-4164-2015 Orgiani, Pasquale/AAC-8703-2019 Galdi, Alice/J-5072-2012 Ghiringhelli, Giacomo/D-1159-2014 Ciancio, Regina/R-8845-2016 Brookes, Nicholas B/C-6718-2019 Moretti, Marco/AAF-9255-2019 }}, ORCID-Numbers = {{Aruta, Carmela/0000-0002-6917-6667 Sala, Marco Moretti/0000-0002-9744-9976 Orgiani, Pasquale/0000-0002-1082-9651 Cataudella, Vittorio/0000-0002-1835-1429 Orgiani, Pasquale/0000-0002-1082-9651 Galdi, Alice/0000-0003-2863-5393 Ghiringhelli, Giacomo/0000-0003-0867-7748 Brookes, Nicholas B/0000-0002-1342-9530 Moretti, Marco/0000-0002-9744-9976 DE FILIPPIS, Giulio/0000-0003-0557-3556}}, Funding-Acknowledgement = {{European CommunityEuropean Community (EC) {[}212348 NFFA]}}, Funding-Text = {{R.C.'s research activity has received funding from the European Community's Seventh Framework Programme 2007-2011 under grant Agreement No. 212348 NFFA.}}, Number-of-Cited-References = {{33}}, Times-Cited = {{22}}, Usage-Count-Last-180-days = {{1}}, Usage-Count-Since-2013 = {{29}}, Journal-ISO = {{Phys. Rev. B}}, Doc-Delivery-Number = {{684DG}}, Unique-ID = {{ISI:000284527000005}}, DA = {{2020-12-22}}, }
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