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Possible observation of localized 4f shell breakdown in praseodymium under pressure

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Zeitschrift für Physik B Condensed Matter

Abstract

A phase transition occurs in Pr at a pressure of 190 kbar and 300 K as seen from a precipitous resistance drop. In the low-P phase, the temperature dependence of the electrical resistivity is highly anomalous, the following features becoming more pronounced toward the transition. The temperature coefficient is extremely small between 300 K and 100 K. Below 50 K, the resistivity drops steeply. Both these features are well known for the γ and β phase of cerium. In contrast, the high-P phase exhibits a “normal”, i.e. an almost linear temperature characteristic as also observed for Ce in the “collapsed” α phase. We suggest that the phase transition in Pr may turn out to be a counterpart of the γ→α transformation in Ce which is now understood as the delocalization of the 4f 1 configuration into a 4f band.

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Author notes

  1. Jörg Wittig (IBM World Trade Visiting Scientist)

    Present address: the Institut für Festkörperforschung, KFA Jülich, D-5170, Jülich, Fed. Rep. Germany

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  1. IBM Thomas J. Watson Research Center, P.O. Box 218, 10598, Yorktown Heights, NY, USA

    Jörg Wittig (IBM World Trade Visiting Scientist)

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  1. Jörg Wittig
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Wittig, J. Possible observation of localized 4f shell breakdown in praseodymium under pressure. Z. Physik B - Condensed Matter 38, 11–20 (1980). https://doi.org/10.1007/BF01321197

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  • DOI: https://doi.org/10.1007/BF01321197

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