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- W2073486670 abstract "We have determined the physical ground state properties of the compounds CeRuPO and CeOsPO by means of magnetic susceptibility $ensuremath{chi}(T)$, specific heat $C(T)$, electrical resistivity $ensuremath{rho}(T)$, and thermopower $S(T)$ measurements. $ensuremath{chi}(T)$ reveals a trivalent $4{f}^{1}$ cerium state in both compounds. For CeRuPO a pronounced decrease of $ensuremath{rho}(T)$ below $50phantom{rule{0.3em}{0ex}}mathrm{K}$ indicates the onset of coherent Kondo scattering, which is confirmed by enhanced $S(T)$. The temperature and magnetic field dependence of $ensuremath{chi}(T)$ and $C(T)$ evidence ferromagnetic (FM) order at ${T}_{C}=15phantom{rule{0.3em}{0ex}}mathrm{K}$. Thus, CeRuPO seems to be one of the rare examples of a FM Kondo lattice. In contrast, CeOsPO shows antiferromagnetic order at ${T}_{N}=4.5phantom{rule{0.3em}{0ex}}mathrm{K}$ despite only minor changes in lattice parameters and electronic configuration. Additional $^{31}mathrm{P}$ NMR results support these scenarios. $mathrm{LSDA}+U$ calculations evidence a quasi-two-dimensional electronic band structure, reflecting a strong covalent bonding within the CeO and RuP layers and a weak ioniclike bonding between the layers." @default.
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- W2073486670 date "2007-09-18" @default.
- W2073486670 modified "2023-09-27" @default.
- W2073486670 title "CeRuPO: A rare example of a ferromagnetic Kondo lattice" @default.
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- W2073486670 doi "https://doi.org/10.1103/physrevb.76.104418" @default.
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