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• W2991567642 abstract "The magnetism and superconductivity of ${mathrm{Sm}}_{1.85ensuremath{-}x}{mathrm{Gd}}_{x}{mathrm{Ce}}_{0.15}{mathrm{CuO}}_{4ensuremath{-}ensuremath{delta}}$ and ${mathrm{Gd}}_{2ensuremath{-}y}{mathrm{Ce}}_{y}{mathrm{CuO}}_{4ensuremath{-}ensuremath{delta}}$ crystals were investigated. In the ${mathrm{Sm}}_{1.85ensuremath{-}x}{mathrm{Gd}}_{x}{mathrm{Ce}}_{0.15}{mathrm{CuO}}_{4ensuremath{-}ensuremath{delta}}$ system, superconductivity is suppressed by Gd substitution, and temperature-induced magnetic transitions appear at 3, 7, and 135 K above $x=1.2$ Cu spins have an antiferromagnetic (AF) order along the [110] direction among these transitions, and a weak-ferromagnetic (WF) moment due to a canting of Cu spins appears along the $[1ifmmodebarelsetextasciimacronfi{}10]$ direction at $Tl~3mathrm{K}$ and $7mathrm{K}l~Tl~135mathrm{K}.$ The AF order at $3mathrm{K}l~Tl~7mathrm{K}$ changes into a canted spin configuration via field-induced spin reorientation and induces the WF moment. The N'eel temperature ${T}_{mathrm{NCu}}$ (135 K at $x=1.2)$ and spin-reorientation temperature ${T}_{mathrm{SR}}$ (7 K at $x=1.2),$ which are due to the Cu sublattice and are observed at low field intensity, increase with increasing x. Sm spins have an antiferromagnetic order along the [001] direction at $x=0$ below the N'eel temperature ${T}_{mathrm{NR}}$ (ensuremath{sim}5 K), but ${T}_{mathrm{NR}},$ which is observed for low x at high field intensity, decreases with increasing x and disappears at $xensuremath{approx}1.$ Gd spins have an antiferromagnetic order along the $[1ifmmodebarelsetextasciimacronfi{}10]$ direction for specimens with $xg1.4$ near 3 K. The change in the geometry of rare-earth and Cu spins resulting from Gd substitution is considered to be the reason for the suppression of superconductivity." @default.
• W2991567642 created "2019-12-05" @default.
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• W2991567642 date "2002-02-12" @default.
• W2991567642 modified "2023-09-27" @default.
• W2991567642 title "Superconductivity and magnetism ofSm1.85−xGdxCe0.15CuO4−δandGd2−yCeyCuO4−δcrystals" @default.
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• W2991567642 doi "https://doi.org/10.1103/physrevb.65.104506" @default.
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