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- W1654452550 abstract "We report on heat capacity, electrical resistance and high-temperature ESR experiments on the spin-Peierls compound α'-NaV2O5. The spin susceptibility at high temperatures (T > 250 K) closely follows a Bonner-Fisher behavior with an exchange interaction but differs significantly from this predictions at lower temperatures. The temperature dependence of the heat capacity can be explained assuming a sum of a linear (magnetic) and a Debye (lattice) contribution. The specific-heat jump at TSP ≈ 35 K cannot be described by the opening of a gap in mean-field approximation. The release of entropy is almost by a factor of 20 too high compared to the MF predictions of the Bonner-Fisher model for a uniform AFM spin chain with an exchange interaction of J = 578 K. The electrical resistance R(T) can roughly be described by variable-range hopping processes and a large anomaly at the transition into the low-temperature dimerized state. From these observations we conclude that the phase transition in α'-NaV2O5 at 35 K cannot be explained by a spin-Peierls transition alone." @default.
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- W1654452550 date "1998-06-15" @default.
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- W1654452550 title "Thermodynamic, transport and magnetic properties of α′-NaV 2 O 5" @default.
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- W1654452550 doi "https://doi.org/10.1209/epl/i1998-00302-7" @default.
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