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| 001 | 397768 | ||
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| 100 | 1 | _ | |a Castellano, Carlo |0 P:(DE-H253)PIP1008227 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Strong enhancement of the ferromagnetic phase and local order in Ru substituted manganites studied by EXAFS and dc magnetizationmeasurements |
| 260 | _ | _ | |a Lausanne |c 2016 |b Elsevier |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a We report extended X-ray absorption fine structure (EXAFS) and dc magnetization measurements performed on (La$_{1-x}$Ca$_x$) (Mn$_{1-}$yRu$_y$)O$_3$ samples (x = 0.37 and 0.75 and y = 0.03 or 0.08).In the nanoscale phase inhomogeneity scenario characteristic of these complex oxides, we compare the effects induced by the partial substitution of Mn with mixed valence non-Jahn-Teller Ru5+ and at most very weak Jahn-Teller Ru$^{4+}$ ions with those induced by the already studied analogous substitutions of Mn with non-Jahn-Teller Cr$^{3+}$ or Ni$^{2+}$ or Jahn-Teller Cu$^{2+}$.We find evidence both from dc magnetization and EXAFS that the ruthenium doping induces a huge effect, clearly enhancing (more efficiently than is the case for the other dopants) the double exchange effect and consequently the metallic/ferromagnetic phase and the local structural order at the expenses of the charge-ordered phase component. In the x = 0.75 long-range charge-ordered system these effects are much more evident, as expected, while for x = 0.37 the magnetic ion partial substitution does not significantly modify the metal-insulator and ferromagnetic transitions, already present in the parent compound. |
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| 773 | _ | _ | |a 10.1016/j.jallcom.2015.12.183 |g Vol. 663, p. 560 - 564 |0 PERI:(DE-600)2012675-X |p 560 - 564 |t Journal of alloys and compounds |v 663 |y 2016 |x 0925-8388 |
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