From Cuprate to Nickelate: Evolution of the Normal State Properties with Ni from La_{1.85}Sr_{0.15}CuO_4 to La_{1.85}Sr_{0.15}NiO_4

• Authors: V. Bezusyy , A. Malinowski , R. Minikayev , W. Paszkowicz , P. Dziawa , R. Gorzelniak
• Languages of publication: EN

Abstracts

EN

The influence of Ni doping on the normal-state pseudogap in La_{1.85}Sr_{0.15}CuO_4 is studied by dc magnetic susceptibility measurements, accompanied by X-ray powder diffraction analysis and resistivity measurements. The measurements are carried out on the polycrystalline La_{1.85}Sr_{0.15}Cu_{1-y}Ni_yO_4 samples in the whole doping range from y=0.01 up to y=1. The temperature of pseudogap opening is found to decrease above y=0.05 and to vanish when y exceeds 0.07. At small Ni content, up to y=0.07, the magnetic moment induced by Ni is constant and equal to 0.7 μ_{B} per Ni, while for larger y it increases abruptly and reaches about 1.6 μ_{B} per Ni ion for y = 0.5. The dependence of the normal-state resistivity on temperature evolves smoothly from the metallic-like for small y, to the variable range hopping, described by the Mott law with the exponent 1/4, for samples with y>0.15.

Keywords

EN

74.25.Ha; 74.72.-h; 74.72.Kf; 75.30.-m

Discipline

• 74.72.-h: Cuprate superconductors
• 74.25.Ha: Magnetic properties including vortex structures and related phenomena(for vortices, magnetic bubbles, and magnetic domain structure, see 75.70.Kw)
• 74.72.Kf: Pseudogap regime
• 75.30.-m: Intrinsic properties of magnetically ordered materials(for critical point effects, see 75.40.-s; for magnetotransport phenomena, see 75.47.-m)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 2
• Pages: 402-405

Dates

published

2010-08

Contributors

author

V. Bezusyy

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

A. Malinowski

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

R. Minikayev

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

W. Paszkowicz

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

P. Dziawa

• Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland

author

R. Gorzelniak

• Institute of Low Temperature and Structure Research, PAS, Okólna 2, 50-422 Wrocław, Poland

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Identifiers

DOI

10.12693/APhysPolA.118.402