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- W1608877162 abstract "A neutron powder-diffraction experiment has been performed to investigate the structural phase transition and magnetic order in ${text{CaFe}}_{1ensuremath{-}x}{text{Co}}_{x}text{AsF}$ superconductor compounds $(x=0.00,0.06,0.12)$. The parent compound CaFeAsF undergoes a tetragonal to orthorhombic phase transition at 134(3) K, while the magnetic order in the form of a spin-density wave (SDW) sets in at 114(3) K. The antiferromagnetic structure of the parent compound has been determined with a unique propagation vector $k=(1,0,1)$ and the Fe saturation moment of $0.49(5){ensuremath{mu}}_{B}$, aligned along the long $a$ axis. With increasing Co doping, the long-range antiferromagnetic order has been observed to coexist with superconductivity in the orthorhombic phase of the underdoped ${text{CaFe}}_{0.94}{text{Co}}_{0.06}text{AsF}$ with a reduced Fe moment $[ensuremath{sim}0.15(5){ensuremath{mu}}_{B}]$. Magnetic order is completely suppressed in optimally doped ${text{CaFe}}_{0.88}{text{Co}}_{0.12}text{AsF}$. We argue that the coexistence of SDW and superconductivity might be related to mesoscopic phase separation." @default.
- W1608877162 created "2016-06-24" @default.
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- W1608877162 date "2009-02-09" @default.
- W1608877162 modified "2023-10-16" @default.
- W1608877162 title "Magnetic order in the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mtext>CaFe</mml:mtext></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Co</mml:mtext></mml:mrow><mml:mi>x</mml:mi></mml:msub><mml:mtext>AsF</mml:mtext></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:…" @default.
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- W1608877162 doi "https://doi.org/10.1103/physrevb.79.060504" @default.
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