The appearance of static magnetism, nanoscopically coexisting with superconductivity, is shown to be a general feature of optimally electron-doped LFe1−xRuxAsO1−yFy superconductors (L represents a lanthanide ion) upon isovalent substitution of Fe by Ru. The magnetic ordering temperature TN and the magnitude of the internal field display a domelike dependence on x, peaked around x=1/4, with higher TN values for those materials characterized by a larger z cell coordinate of As. Remarkably, the latter are also those with the highest superconducting transition temperatures (Tc) for x=0. The reduction of Tc(x) is found to be significant in the x region of the phase diagram where the static magnetism develops. Upon increasing the Ru content superconductivity eventually disappears, but only at x≃0.6.

Onset of magnetism in optimally electron-doped LnFe1-xRuxAsO1-yFy (Ln = La, Nd or Sm) superconductors around x=1/4 / S., Sanna; P., Carretta; DE RENZI, Roberto; G., Prando; Bonfa', Pietro; Mazzani, Marcello; G., Lamura; T., Shiroka; Y., Kobayashi; M., Sato. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 87:(2013), p. 134518. [10.1103/PhysRevB.87.134518]

Onset of magnetism in optimally electron-doped LnFe1-xRuxAsO1-yFy (Ln = La, Nd or Sm) superconductors around x=1/4

DE RENZI, Roberto;BONFA', Pietro;MAZZANI, Marcello;
2013-01-01

Abstract

The appearance of static magnetism, nanoscopically coexisting with superconductivity, is shown to be a general feature of optimally electron-doped LFe1−xRuxAsO1−yFy superconductors (L represents a lanthanide ion) upon isovalent substitution of Fe by Ru. The magnetic ordering temperature TN and the magnitude of the internal field display a domelike dependence on x, peaked around x=1/4, with higher TN values for those materials characterized by a larger z cell coordinate of As. Remarkably, the latter are also those with the highest superconducting transition temperatures (Tc) for x=0. The reduction of Tc(x) is found to be significant in the x region of the phase diagram where the static magnetism develops. Upon increasing the Ru content superconductivity eventually disappears, but only at x≃0.6.
Onset of magnetism in optimally electron-doped LnFe1-xRuxAsO1-yFy (Ln = La, Nd or Sm) superconductors around x=1/4 / S., Sanna; P., Carretta; DE RENZI, Roberto; G., Prando; Bonfa', Pietro; Mazzani, Marcello; G., Lamura; T., Shiroka; Y., Kobayashi; M., Sato. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 87:(2013), p. 134518. [10.1103/PhysRevB.87.134518]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2589246
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