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- W73971574 abstract "Current-voltage V(I) characteristics, and the magnetoresistivity ensuremath{rho}(T,H) have been measured for a ${mathrm{Sm}}_{1.85}$${mathrm{Ce}}_{0.15}$${mathrm{CuO}}_{4mathrm{ensuremath{-}}mathit{y}}$ single crystal in magnetic fields parallel to the c axis. We have found that a well-defined line ${mathit{H}}^{mathrm{*}}$(T) exists in the H-T plane which separates Ohmic from non-Ohmic behavior. Below ${mathit{H}}^{mathrm{*}}$(T), the V(I) curves are described by V/Iensuremath{sim}exp[-U(T,H,I)/${mathit{k}}_{mathit{B}}$T] where U(T,H,I)ensuremath{sim}U(T,H) ln(${mathit{I}}_{0}$/I). From the analysis of the V(I) characteristics the effective flux-creep energy barriers at any temperature and magnetic field are extracted. These data are used to calculate the magnetoresistivity curves ensuremath{rho}(T,H) which compare very favorably with the experimental data over ensuremath{le}80%${mathrm{ensuremath{rho}}}_{mathit{n}}$ of the resistive transition. The significance of the observed U(I)ensuremath{sim}- lnI dependence is discussed." @default.
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- W73971574 date "1993-08-01" @default.
- W73971574 modified "2023-09-25" @default.
- W73971574 title "Elastic flux creep in aSm1.85Ce0.15CuO4−ysingle crystal" @default.
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- W73971574 doi "https://doi.org/10.1103/physrevb.48.4223" @default.
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