Anisotropy and reversible magnetization of the infinite-layer superconductor Sr0.9La0.1CuO2

Mun-Seog Kim; Thomas R. Lemberger; C. U. Jung; Jae-Hyuk Choi; J. Y. Kim; Heon-Jung Kim; Sung-Ik Lee

doi:10.1103/PhysRevB.66.214509

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Anisotropy and reversible magnetization of the infinite-layer superconductor Sr0.9La0.1CuO2

Mun-Seog Kim, Thomas R. Lemberger, C. U. Jung, Jae-Hyuk Choi, J. Y. Kim, Heon-Jung Kim, Sung-Ik Lee

DOI 10.1103/PhysRevB.66.214509 · Physical Review B

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Abstract

We present reversible magnetization measurements of a c-axis aligned Sr0.9La0.1CuO2 infinite-layer superconductor with Tc≃43K. The magnetization measured as a function of temperature and angle between the c axis and the external magnetic field are analyzed in terms of the Hao-Clem model. Consequently, the critical fields [Hc(0), Hc1c(0), and Hc2c(0)] and the characteristic lengths [ξab(0) and λab(0)] are derived. We introduce a novel technique to describe the angular dependence of magnetization using the Hao-Clem model by employing the effective mass anisotropy. The anisotropy ratio γ=9.3 and the zero-temperature coherence length along the c axis ξc(0)=5.2Å are obtained by the technique. The coherence length ξc(0) is longer than the c-axis lattice parameter c=3.41Å, which implies three-dimensional coupling between CuO2 planes even at zero temperature.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Sr0.9La0.1CuO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	43	Pressure not reported	unknown