Impact of oxygen annealing on the heat capacity and magnetic resonance of superconducting Pr0.88LaCe0.12CuO4−

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.78.014520· OSTI ID:944616

Li, Shiliang ^[1]; Chi, Songxue ^[1]; Zhao, Jun ^[2]; Wen, H. H. ^[3]; Stone, Matthew B ^[2]; Lynn, J. W. ^[4]; Dai, Pengcheng ^[2]

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1. University of Tennessee, Knoxville (UTK)
2. ORNL
3. Chinese Academy of Sciences
4. National Institute of Standards and Technology (NIST)

We use thermodynamic and neutron-scattering measurements to study the effect of oxygen annealing on the superconductivity and magnetism in Pr0.88LaCe0.12CuO4−. Although the transition temperature Tc 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 Tc and the presence of a neutron magnetic resonance, only appears abruptly when Tc 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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 944616
• Journal Information: Physical Review B, Vol. 78, Issue 014520
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNEALING
ANTIFERROMAGNETISM
COHERENCE LENGTH
COPPER OXIDES
MAGNETIC RESONANCE
MAGNETISM
NEUTRONS
OXYGEN
PHASE DIAGRAMS
REMOVAL
SPECIFIC HEAT
SUPERCONDUCTIVITY
THERMODYNAMICS
TRANSITION TEMPERATURE
annealing
cerium compounds
lanthanum compounds
praseodymium compounds
superconducting transitions