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- W1973642451 abstract "The newly developed temperature-modulated differential scanning calorimetry (DSC) has been used to investigate the frequency dependence of heat capacity in the glass transition region for the ${mathrm{Pd}}_{40}{mathrm{Ni}}_{10}{mathrm{Cu}}_{30}{mathrm{P}}_{20}$ alloy upon heating and cooling. In contrast to conventional DSC results, the present work showed a dissipative behavior of the heat-flow response of the deeply supercooled ${mathrm{Pd}}_{40}{mathrm{Ni}}_{10}{mathrm{Cu}}_{30}{mathrm{P}}_{20}$ liquid in the glass transition region, qualitatively similar to the results obtained by specific heat spectroscopy on glycerol. A strong dependence of the temperature modulation period on the temperature of the peak imaginary part of complex heat capacity, ${T}_{mathrm{max}},$ was found indicating a slowdown of the supercooled liquid dynamics as temperature decreased. This frequency dependence of ${T}_{mathrm{max}}$ can be well described by either the Arrhenius law or the Vogel-Fulcher-Tamman (VFT) equation. Furthermore, the VFT fit to the experimental data showed that the VFT temperature ${T}_{0}$ was coincident with the thermodynamically determined Kauzmann temperature ${T}_{K}.$ The average characteristic time of enthalpy relaxation was determined to be approximately 50 s at 579 K and the apparent activation energy of glass transition was estimated to be $577ifmmodepmelsetextpmfi{}22mathrm{k}mathrm{J}/mathrm{m}mathrm{o}mathrm{l}.$" @default.
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- W1973642451 date "2000-08-01" @default.
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- W1973642451 title "Frequency dependence of heat capacity of the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Pd</mml:mi></mml:mrow><mml:mrow><mml:mn>40</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ni</mml:mi></mml:mrow><mml:mrow><mml:mn>10</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Cu</mml:mi></mml:mrow><mml:mrow><mml…" @default.
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- W1973642451 doi "https://doi.org/10.1103/physrevb.62.3169" @default.
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