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- W79797924 abstract "We have performed magnetization measurements on a series of high-quality, large single crystals of (${mathrm{La}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Sr}}_{mathit{x}}$${)}_{2}$${mathrm{CuO}}_{4}$ over a composition range of x=0.05--0.10, with magnetic fields parallel to the c axis. In order to avoid the large fluctuation effects near ${mathit{T}}_{mathit{c}}$ in the analysis of the magnetization of these layered superconductors, a method of data analysis, based on the variational model developed by Hao and Clem, is used for the determination of the magnetic penetration depth ${ensuremath{lambda}}_{mathit{a}mathit{b}}$(T) of this family. The conventional London approximation for the determination of ensuremath{lambda}(T) from mixed-state magnetization isotherms M(H,T) is also reevaluated, and found generally to overestimate ${ensuremath{lambda}}_{mathit{a}mathit{b}}$(T) of (${mathrm{La}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Sr}}_{mathit{x}}$${)}_{2}$${mathrm{CuO}}_{4}$ by as much as 20%. Our derived values of ${ensuremath{lambda}}_{mathit{a}mathit{b}}$(0) by the Hao-Clem model shows a minimum for the crystal (x=0.077) having the highest ${mathit{T}}_{mathit{c}}$(=35.05 K). This minimum value of ${ensuremath{lambda}}_{mathit{a}mathit{b}}$(0) (=2545ifmmodepmelsetextpmfi{}40 AA{}) is in agreement with the earlier reported value of ensuremath{lambda}(0) (ensuremath{sim}2500 AA{}) for a polycrystalline sample of (${mathrm{La}}_{1mathrm{ensuremath{-}}mathit{x}}$${mathrm{Sr}}_{mathit{x}}$${)}_{2}$${mathrm{CuO}}_{4}$ with x=0.075 obtained by using the muon-spin-relaxation technique." @default.
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- W79797924 date "1993-02-01" @default.
- W79797924 modified "2023-10-01" @default.
- W79797924 title "Magnetic penetration depth of (La1−xSrx)2CuO4single crystals" @default.
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- W79797924 doi "https://doi.org/10.1103/physrevb.47.2854" @default.
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