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• W1974801809 abstract "Of the dense Kondo materials in the class $mathrm{Ce}T{mathrm{Sb}}_{2}$ (where $T=mathrm{Au}$, Ag, Ni, Cu, or Pd), $mathrm{Ce}mathrm{Ag}{mathrm{Sb}}_{2}$ is special due to its complex magnetic ground state, which exhibits both ferromagnetic and antiferromagnetic character below an ordering temperature ${T}_{O}ensuremath{sim}9.8phantom{rule{0.3em}{0ex}}mathrm{K}$. To further elucidate a description of this magnetic ground state, we have carried out a systematic study of single crystalline $mathrm{Ce}mathrm{Ag}{mathrm{Sb}}_{2}$ by magnetic, electrical magneto-transport, and Shubnikov-de Haas (SdH) studies. We have constructed the magnetic phase diagram based solely on magnetoresistance data. Here, depending on the orientation of the magnetic field $H$, either ferromagnetic or antiferromagnetic ordering occurs below ${T}_{O}$. At zero field the temperature-dependent resistivity below ${T}_{O}$ is most consistent with antiferromagnetic order, based on the transport theory which includes magnon scattering. The crystal-field-effect theory applied to the susceptibility data yields splitting energies from the ground state to the first and second excited states of $53phantom{rule{0.3em}{0ex}}mathrm{K}$ and $137phantom{rule{0.3em}{0ex}}mathrm{K}$, respectively. Based on different models to determine the Kondo temperature ${T}_{K}$, we can obtain both low-temperature and high-temperature estimates for ${T}_{K}$ of $ensuremath{sim}23phantom{rule{0.3em}{0ex}}mathrm{K}$ and $ensuremath{sim}65phantom{rule{0.3em}{0ex}}mathrm{K}$, respectively. In the Fermi surface studies, the measurements show very small Fermi surface sections, not predicted by band-structure calculations, and the SdH amplitudes are very sensitive to field direction." @default.
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• W1974801809 date "2005-09-21" @default.
• W1974801809 modified "2023-10-18" @default.
• W1974801809 title "Magnetization and electrical-transport investigation of the dense Kondo system<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:mi mathvariant=normal>Ce</mml:mi><mml:mi mathvariant=normal>Ag</mml:mi><mml:msub><mml:mi mathvariant=normal>Sb</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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• W1974801809 doi "https://doi.org/10.1103/physrevb.72.104428" @default.
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