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Preparation of Single-Crystal Isotopically Enriched 70Ge by a Hydride Method

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Inorganic Materials Aims and scope

Abstract—

Single-crystal 70Ge germanium with high isotopic and chemical purity has been prepared by a hydride method. Germanium isotopes have been separated by centrifugation with the use of monogermane as a starting volatile substance. Isotopically enriched polycrystalline 70Ge has been prepared by pyrolyzing 70GeH4 monogermane. A 70Ge single crystal has been grown by the Czochralski technique. The resultant material has p-type conductivity and intrinsic resistivity at room temperature. The concentration of elemental impurities is under 10–6 to 10–5 wt %. The isotopic purity of the 70Ge single crystal is 99.926 at % and it contains a record low concentration of the odd isotope 73Ge: 0.00007 at %.

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ACKNOWLEDGMENTS

We are grateful to A.M. Potapov and O.Yu. Chernova for their assistance in the analysis of the monogermane and germanium samples for isotopic and chemical impurities.

Funding

This work was supported by the Russian Federation Ministry of Science and Higher Education, theme no. 0095-2019-0008: Conducting Basic Scientific Research (Carrying out Basic Research (GP14)).

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Authors and Affiliations

  1. Devyatykh Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, 603951, Nizhny Novgorod, Russia

    V. A. Gavva, O. Yu. Troshin, S. A. Adamchik, A. Yu. Lashkov, A. M. Gibin, P. A. Otopkova, A. Yu. Sozin & A. D. Bulanov

  2. Leibniz-Institut für Kristallzüchtung (IKZ), 12489, Berlin, Germany

    N. V. Abrosimov

Authors
  1. V. A. Gavva
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  2. O. Yu. Troshin
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  3. S. A. Adamchik
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  4. A. Yu. Lashkov
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  5. N. V. Abrosimov
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  6. A. M. Gibin
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  7. P. A. Otopkova
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  8. A. Yu. Sozin
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  9. A. D. Bulanov
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Correspondence to V. A. Gavva.

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Translated by O. Tsarev

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Gavva, V.A., Troshin, O.Y., Adamchik, S.A. et al. Preparation of Single-Crystal Isotopically Enriched 70Ge by a Hydride Method. Inorg Mater 58, 246–251 (2022). https://doi.org/10.1134/S0020168522030050

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  • DOI: https://doi.org/10.1134/S0020168522030050

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