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Inversion of electron spins in CaO with the reversal of the magnetic field

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Zeitschrift für Physik B Condensed Matter

Abstract

We have obtained population inversion of a system of polarized (P=80%) electron spins in a solid during a very fast (dB z dt=4·105 T·s −1) reversal of the external magnetic field. The electrons were trapped at oxygen vacancies in CaO single crystals. This method, whch does not exploit any high frequency electromagnetic field, has been for the first time successfully used to achieve an inverted state of electron spins in a solid. The negative temperature of an electron spin ensembleT=−23 mK has been obtained.

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Author notes

  1. U. Nagel

    Present address: MPI für Physik, Föhringer Ring 6, W-8000, München 40, Germany

Authors and Affiliations

  1. Institute of Chemical Physics and Biophysics, Estonian Academy of Sciences, Rävala pst. 10, EE0100, Tallinn, Estonia

    U. Nagel & G. Liidja

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  1. U. Nagel
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  2. G. Liidja
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Nagel, U., Liidja, G. Inversion of electron spins in CaO with the reversal of the magnetic field. Z. Physik B - Condensed Matter 91, 21–24 (1993). https://doi.org/10.1007/BF01316703

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  • DOI: https://doi.org/10.1007/BF01316703

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