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- W2397629698 abstract "The full substitution of Ni by Co and Pt enclosed in the same crystalline structure $(I4∕mmm)$ of Pr-based compounds have been investigated. The structural characteristics, magnetic properties, and magnetoresistance of $mathrm{Pr}{mathrm{Co}}_{2}{mathrm{B}}_{2}mathrm{C}$, $mathrm{Pr}{mathrm{Ni}}_{2}{mathrm{B}}_{2}mathrm{C}$, and $mathrm{Pr}{mathrm{Pt}}_{2}{mathrm{B}}_{2}mathrm{C}$ single crystals were studied to determine the reason for the absence or presence of superconductivity in those compounds. An antiferromagnetic transition was found for $mathrm{Pr}{mathrm{Co}}_{2}{mathrm{B}}_{2}mathrm{C}$ at about $8.5phantom{rule{0.3em}{0ex}}mathrm{K}$, where the easy magnetization axis is along the $c$-crystallographic direction whereas in $mathrm{Pr}{mathrm{Ni}}_{2}{mathrm{B}}_{2}mathrm{C}$ the easy magnetization was at the $ab$ plane. In $mathrm{Pr}{mathrm{Ni}}_{2}{mathrm{B}}_{2}mathrm{C}$ a small magnetization without traces of saturation is found when it is measured up to $18phantom{rule{0.3em}{0ex}}text{Tesla}$ of applied magnetic field. This behavior suggests a screening effect as a result of a moderate hybridization between the conduction band and Pr ions. Superconductivity occurs in $mathrm{Pr}{mathrm{Pt}}_{2}{mathrm{B}}_{2}mathrm{C}$ at about $6phantom{rule{0.3em}{0ex}}mathrm{K}$. The Pt-Pt distance and internal bonding angles are similar to those observed in the superconducting Ni-based compounds. Magnetoresistance measurements show positive and quadratic behavior $(ensuremath{Delta}ensuremath{rho}∕{ensuremath{rho}}_{0}ensuremath{sim}a{H}^{2})$ suggesting a spin fluctuation system. In the $mathrm{Pr}{mathrm{Pt}}_{2}{mathrm{B}}_{2}mathrm{C}$ compound the electronic mean free path is smaller than the BCS coherence length $(ensuremath{iota}⪡ensuremath{epsilon})$ suggesting a dirty type II superconductor." @default.
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- W2397629698 date "2006-10-27" @default.
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- W2397629698 title "Isomorphous<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>Pr</mml:mi><mml:msub><mml:mi>T</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>B</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi mathvariant=normal>C</mml:mi></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mo>(</mml:mo><mml:mi>T</mml:mi><mml:mo>=</mml:mo><mml:mi mathvariant=normal>…" @default.
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- W2397629698 doi "https://doi.org/10.1103/physrevb.74.134513" @default.
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