By a systematic study of the hydrogen-doped LaFeAsO system by means of dc resistivity, dc magnetometry, and muon-spin spectroscopy we addressed the question of universality of the phase diagram of rare-earth-1111 pnictides. In many respects, the behaviour of LaFeAsO1−xHxresembles that of its widely studied F-doped counterpart, with H− realizing a similar (or better) electron-doping in the LaO planes. In a x = 0.01 sample we found a long-range SDW order with TN = 118 K, while at x = 0.05 the SDW establishes only at 30 K and, below Tc = 10 K, it coexists at a nanoscopic scale with bulk superconductivity. Unlike the abrupt M-SC transition found in the parent La-1111 compound, the presence a crossover region makes the H-doped system qualitatively similar to other Sm-, Ce-, or Nd-1111 families.

Crossover betwee magnetism and superconductivity in low H-doped LaFeAsO / G., Lamura; T., Shiroka; Bonfa', Pietro; S., Sanna; DE RENZI, Roberto; F., Caglieris; M. R., Cimberle; S., Matuishi; S., Iimura; H., Hosono; M., Putti. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - 26:(2014), pp. 295701-295701. [10.1088/0953-8984/26/29/295701]

Crossover betwee magnetism and superconductivity in low H-doped LaFeAsO

BONFA', Pietro;DE RENZI, Roberto;
2014-01-01

Abstract

By a systematic study of the hydrogen-doped LaFeAsO system by means of dc resistivity, dc magnetometry, and muon-spin spectroscopy we addressed the question of universality of the phase diagram of rare-earth-1111 pnictides. In many respects, the behaviour of LaFeAsO1−xHxresembles that of its widely studied F-doped counterpart, with H− realizing a similar (or better) electron-doping in the LaO planes. In a x = 0.01 sample we found a long-range SDW order with TN = 118 K, while at x = 0.05 the SDW establishes only at 30 K and, below Tc = 10 K, it coexists at a nanoscopic scale with bulk superconductivity. Unlike the abrupt M-SC transition found in the parent La-1111 compound, the presence a crossover region makes the H-doped system qualitatively similar to other Sm-, Ce-, or Nd-1111 families.
2014
Crossover betwee magnetism and superconductivity in low H-doped LaFeAsO / G., Lamura; T., Shiroka; Bonfa', Pietro; S., Sanna; DE RENZI, Roberto; F., Caglieris; M. R., Cimberle; S., Matuishi; S., Iimura; H., Hosono; M., Putti. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - 26:(2014), pp. 295701-295701. [10.1088/0953-8984/26/29/295701]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2703100
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