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ESR- and magnetic susceptibility measurements on the potassium molybdenum bronzes

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Zeitschrift für Physik B Condensed Matter

Abstract

Magnetic and transport properties of the transition metal bronzes are determined by the extent of delocalization of the transition metal 4d-electrons. We report on ESR investigations of single crystals of the “red” potassium molybdenum bronze K0.33MoO3 and of the “blue” potassium molybdenum bronze K0.30MoO3. ESR spectra due to unpairedd-electrons are observed at both compounds. Analyzing the hyperfine structure we find that thed 1-electrons are delocalized over six molybdenum lattice sites in semiconducting K0.33MoO3. The same K0.33MoO3 crystals show another spectrum which is caused by pairs of exchange coupledd-electrons. Our results are compared with those from magnetic susceptibility measurements and are discussed in connection with the crystal structure of K0.33MoO3 and K0.30MoO3.

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Authors and Affiliations

  1. Fachbereich Physik Experimentalphysik II, Technische Hochschule Darmstadt, Hochschulstraße 2, D-6100, Darmstadt, Germany

    G. Bang & G. Sperlich

Authors
  1. G. Bang
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  2. G. Sperlich
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Additional information

Project of “Sonderforschungsbereich Festkörperspektroskopie Darmstadt/Frankfurt”, financed by special funds of the Deutsche Forschungsgemeinschaft.

Darmstädter Dissertation D 17, 1975.

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Bang, G., Sperlich, G. ESR- and magnetic susceptibility measurements on the potassium molybdenum bronzes. Z Physik B 22, 1–12 (1975). https://doi.org/10.1007/BF01325454

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  • DOI: https://doi.org/10.1007/BF01325454

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