Matches in SemOpenAlex for { <https://semopenalex.org/work/W2079740064> ?p ?o ?g. }
- W2079740064 abstract "We report on the magnetic structure, thermopower, compressibility, and electrical resistivity under pressure of the recently discovered heavy-fermion antiferromagnet ${text{U}}_{4}{text{PdGa}}_{12}$. The ordering temperature of the annealed polycrystalline ${text{U}}_{4}{text{PdGa}}_{12}$ is ${T}_{N}ensuremath{sim}45.5text{ }text{K}$. The magnetic structure has been investigated by neutron diffraction. Extra reflections in the powder spectrum appear below $ensuremath{sim}46text{ }text{K}$, in good agreement with macroscopic measurements. The simplest magnetic structure compatible with neutron-diffraction data is a collinear antiferromagnetic structure described by the propagation vector $mathbf{q}=[001]$. In this case the ordered uranium moment amounts to $1.01(6){ensuremath{mu}}_{B}$ and point along the $a$ axis. Thermopower confirms the heavy-fermion features in this uranium intermetallic with positive and high values of Seebeck coefficient. The magnetic transition is clearly identified and induces an upturn below 45.5 K which is followed by a continuous decrease in $S(T)$ at lower temperature. Electrical resistivity measurements of ${text{U}}_{4}{text{PdGa}}_{12}$ under pressure of up to 13.5 GPa indicate the disappearance of the magnetic ordering temperature ${T}_{N}$ around ${P}_{c}=10text{ }text{GPa}$ while compressibility measurements performed by x-ray diffraction up to 25 GPa do not show any structural phase transition related to this magnetic collapse. At higher pressure $(p>10text{ }text{GPa})$ and at low temperature, a non-Fermi-liquid behavior is observed, with a ${T}^{5/3}$ dependence of the resistivity. This suggests the possible occurrence of a quantum critical point near ${P}_{c}$." @default.
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- W2079740064 date "2009-01-08" @default.
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- W2079740064 title "Magnetic structure and effects of pressure on<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mtext>U</mml:mtext><mml:mn>4</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mtext>PdGa</mml:mtext></mml:mrow><mml:mrow><mml:mn>12</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>" @default.
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- W2079740064 doi "https://doi.org/10.1103/physrevb.79.014409" @default.
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