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- W2012678346 abstract "Magnetization, resistivity, thermal expansion coefficient, and x-ray unit-cell measurements of ${mathrm{Yb}}_{0.4}$${mathrm{In}}_{0.6}$${mathrm{Cu}}_{2}$ under pressure (P up to 25 kbar) and in magnetic fields (${H}_{mathrm{ext}}$ up to 180 kOe) at temperatures 4.2--80 K have been performed. The valence-phase-transition temperature, ${T}_{v}$, is pressure dependent and surprisingly enough also field dependent. One obtains ${mathrm{dT}}_{v}$/dP=-2.1 K/kbar for P6 kbar. Negative chemical pressure obtained by substituting Yb by La or Cu by Ag increases ${T}_{v}$. A theoretical analysis within a previously published model shows that the interconfigurational excitation energy below ${T}_{v}$ changes with pressure at a rate ${mathrm{dE}}_{0}$/dP=-11 K/kbar. The external magnetic field does not affect ${E}_{0}$, but it increases the ${mathrm{Yb}}^{3+}$ excited-state population and thus drives the phase transition to a lower temperature at a rate ${mathrm{dT}}_{v}$/${mathrm{dH}}_{mathrm{ext}=mathrm{ensuremath{-}}}$0.022 K/kOe." @default.
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- W2012678346 date "1988-04-01" @default.
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- W2012678346 title "Pressure, substitution, and magnetic-field dependence of the valence phase transition in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Yb</mml:mi></mml:mrow><mml:mrow><mml:mn>0.4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>In</mml:mi></mml:mrow><mml:mrow><mml:mn>0.6</mml:…" @default.
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- W2012678346 doi "https://doi.org/10.1103/physrevb.37.5633" @default.
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