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- W1979070596 abstract "Measurements of the specific heat on the system ${mathrm{Ca}}_{x}{mathrm{MnO}}_{3}(x<~0.10)$ are reported. Particular attention is paid to the effect that doping the parent compound with electrons by substitution of La for Ca has on the magnetic ground state. The high- $(T>40$ K) temperature data reveal that doping decreases ${T}_{N}$ from 122 K for the undoped sample to 103 K for $x=0.10.$ The low temperature $(T<20$ K) heat-capacity data are consistent with phase separation. The undoped sample displays a finite density of states and typical antiferromagnetic behavior. The addition of electrons in the $x<~0.03$ samples creates local ferromagnetism as evidenced by a decreased internal field and the need to add a ferromagnetic component to the heat-capacity data for $x=0.03.$ Further substitution enhances the ferromagnetism as evidenced by the formation of a long-range ferromagnetic component to the undoped antiferromagnetic structure. The results are consistent with a scenario involving the formation of isolated ferromagnetic droplets for small x that start to overlap for $xensuremath{approx}0.06$ giving rise to long range ferromagnetism coexisting with antiferromagnetism." @default.
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- W1979070596 date "2003-07-07" @default.
- W1979070596 modified "2023-09-24" @default.
- W1979070596 title "Evolution of the magnetic ground state in the electron-doped antiferromagnetCaMnO3" @default.
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- W1979070596 doi "https://doi.org/10.1103/physrevb.68.014403" @default.
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