Impact of oxygen annealing on the heat capacity and magnetic resonance of superconductingPr0.88LaCe0.12CuO4−δ

2008/06/20 by Shiliang Li, Songxue Chi, Jun Zhao +5 · 2 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Annealing (glass) #Heat capacity #Magnetic and transport properties of perovskites and related materials #Materials science #Oxygen #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Thermodynamics #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.78.014520

published as Phys. Rev. B 78, 014520 (2008) · 5 pages, 4 figures, accepted by Phys. Rev. B

arxiv created 2008/06/20 · openalex publication_date 2008/07/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We use thermodynamic and neutron-scattering measurements to study the effect of oxygen annealing on the superconductivity and magnetism in Pr_0.88LaCe_0.12CuO_4\ensuremath-\ensuremathδ. Although the transition temperature T_c measured by susceptibility and superconducting coherence length increases smoothly with gradual oxygen removal from the annealing process, bulk superconductivity, marked by a specific-heat anomaly at T_c and the presence of a neutron magnetic resonance, only appears abruptly when T_c is close to the largest value. These results suggest that the effect of oxygen annealing must first be determined in order to establish a Ce doping dependence of antiferromagnetism and superconductivity phase diagram for electron-doped copper oxides.

Citations

• Evidence for a Quantum Phase Transition inPr2−xCexCuO4−δfrom Transport Measurements
• Weak-coupling Bardeen-Cooper-Schrieffer superconductivity in the electron-doped cuprate superconductors
• Transport evidence of a magnetic quantum phase transition in electron-doped high-temperature superconductors

Cited by

• Intermediate coupling model of the cuprates
• Progress and perspectives on electron-doped cuprates