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Volumn 275, Issue 5307, 1997, Pages 1779-1781

A high-temperature electrical conduction mechanism in the lower mantle phase (Mg,Fe)(1-x)O

Author keywords

[No Author keywords available]

Indexed keywords

FERROUS ION; MAGNESIUM;

EID: 0030620920     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.275.5307.1779     Document Type: Article
Times cited : (60)

References (21)
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    • O2 demonstrated that the recoil-free fraction is equal in ferric and ferrous sites.
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    • note
    • Electronic charge carriers in ionic crystals cause significant strain on the lattice around the excess charge. This combination of the carrier and its associated strain field is the polaron. The mobility of the polaron depends on the mean drift between formation and trapping and the ease of accelerating the carrier in an electric field. Small polarons are bound to lattice sites and can only move by jumps between nearest or next-nearest neighbors, whereas large polarons are free to move in the conductance or valence band of the crystal and consequently have far higher mobilities.
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    • R. N. Shock, Ed. American Geophysical Union, Washington, DC
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    • (1985) Point Defects in Minerals , pp. 47-68
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    • T. Goto, T. J. Ahrens, G. R. Rossman, Y. Syono, Phys. Earth Planet. Inter. 22, 277 (1980); D. M. Sherman, Phys. Chem. Miner. 12, 161 (1985).
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    • Sherman, D.M.1
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    • J. Roberts et al., Eos 76, S156 (1995).
    • (1995) Eos , vol.76
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    • T. Irifune, Nature 370, 131 (1994).
    • (1994) Nature , vol.370 , pp. 131
    • Irifune, T.1
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    • F. Guyot, M. Madon, J. Peyronneau, J. P. Poirier, Earth Planet. Sci. Lett. 90, 52 (1990); B. J. Wood and D. C. Rubie, Science 273, 1522 (1996).
    • (1996) Science , vol.273 , pp. 1522
    • Wood, B.J.1    Rubie, D.C.2
  • 21
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    • note
    • We wish to thank N. Cohen and the University of London Intercollegiate Research Service in Mössbauer Spectroscopy for their assistance in Mössbauer analysis of samples and H. O'Neill for useful discussion in an early stage of this project. This work was supported by the Natural Environment Research Council.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.