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- W1569378128 abstract "We report the synthesis and structural and physical properties of CaFe${}_{4}$As${}_{3}$ single crystals. Needle-like single crystals of CaFe${}_{4}$As${}_{3}$ were grown out of Sn flux and the compound adopted an orthorhombic structure as determined by x-ray diffraction measurements. Electrical, magnetic, and thermal properties indicate that the system undergoes two successive phase transitions, occurring at ${T}_{N1}ensuremath{sim}90$ K and ${T}_{N2}ensuremath{sim}26$ K. At ${T}_{N1}$, electrical resistivities (${ensuremath{rho}}_{b}$ and ${ensuremath{rho}}_{ac}$) are enhanced while magnetic susceptibilities (${ensuremath{chi}}_{b}$ and ${ensuremath{chi}}_{ac}$) are reduced in both directions, parallel and perpendicular to the $b$ axis, consistent with the scenario of antiferromagnetic spin-density-wave formation. At ${T}_{N2}$, specific heat reveals a slope change, and ${ensuremath{chi}}_{ac}$ decreases sharply but ${ensuremath{chi}}_{b}$ shows a clear jump before it decreases again with decreasing temperature. Remarkably, both ${ensuremath{rho}}_{b}$ and ${ensuremath{rho}}_{ac}$ decrease sharply with thermal hysteresis, indicating the first-order nature of the phase transition at ${T}_{N2}$. At low temperatures, ${ensuremath{rho}}_{b}$ and ${ensuremath{rho}}_{ac}$ can be described by $ensuremath{rho}={ensuremath{rho}}_{0}+{AT}^{ensuremath{alpha}}$ (${ensuremath{rho}}_{0}$, $A$, and $ensuremath{alpha}$ are constants). Interestingly, these constants vary with applied magnetic field. The ground state of CaFe${}_{4}$As${}_{3}$ is discussed." @default.
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- W1569378128 date "2011-08-04" @default.
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- W1569378128 title "Structural and physical properties of CaFe<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mn>4</mml:mn></mml:msub></mml:math>As<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>" @default.
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- W1569378128 doi "https://doi.org/10.1103/physrevb.84.054412" @default.
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