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- W2070156716 abstract "The specific heat of the diluted magnetic semiconductors ${mathrm{Hg}}_{1mathrm{ensuremath{-}}mathit{x}mathrm{ensuremath{-}}mathit{y}}$${mathrm{Cd}}_{mathit{y}}$${mathrm{Fe}}_{mathit{x}}$Se has been measured for temperatures below 25K. The excess specific heat (${mathit{C}}_{mathit{m}}$) has been extracted by scaling of nonmagnetic lattice contributions. The resulting ${mathit{C}}_{mathit{m}}$ of these systems reveals a broad maximum at Tensuremath{approxeq}10 K, whereas for low temperatures a Schottky-type exponential decay of ${mathit{C}}_{mathit{m}}$ can be observed. These phenomena can be fairly well understood on the basis of a simple crystal-field model and a random distribution of ${mathrm{Fe}}^{2+}$. On the other hand, no drastic effect of the energy gap is clearly reflected by our data and therefore we suggest that only ${mathrm{Fe}}^{2+}$ states involving the valence bands dominate the antiferromagnetic d-d interactions, analogously to the ${mathrm{Mn}}^{2+}$ case." @default.
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- W2070156716 date "1990-08-01" @default.
- W2070156716 modified "2023-09-26" @default.
- W2070156716 title "Low-temperature specific heat of the diluted magnetic semiconductor<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Hg</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=italic>x</mml:mi><mml:mi mathvariant=normal>−</mml:mi><mml:mi mathvariant=italic>y</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/…" @default.
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- W2070156716 doi "https://doi.org/10.1103/physrevb.42.2455" @default.
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