Abstract
Crystals of 3D topological insulators, bismuth telluride Bi2Te3, doped with manganese were studied using electron spin resonance (ESR) spectroscopy together with the SQUID magnetometry, transport measurements, and X-ray characterization. The obtained ESR data, such as the temperature and the angular dependence of the resonance field, reveal the specific critical behavior and confirm the ferromagnetic ordering of Mn spins even at modest doping. In addition to the studies of the critical behavior of diluted ferromagnet Bi2−x Mn x Te3, we also discuss the effects of the limited solubility of Mn ions giving rise to microscopic inclusions of the spurious magnetic phases which were revealed using ESR technique.
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Notes
During the editorial process we became aware about the recent publication of Zimmermann et al. [25] reporting the ESR studies of the ferromagnetic ordering in Bi2−x Mn x Te3. Their results are in good agreement with those of our findings which follow from the analysis of the line I (main phase) and the comparison of its integral intensity with our SQUID data for susceptibility. At the same time, the authors [25] did not report any contributions to the ESR line similar to our signal II. This difference may be associated with the higher solubility of manganese in the samples studied in [25].
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Acknowledgements
The work is supported by the Russian Foundation for Basic Research (project no. 15-42-02477) and the Russian Academy of Sciences (program 1.26P). V.S. thanks the Foundation for Assistance to Small Innovative Enterprises within “UMNIK” program for the financial support. We thank V. Shustov for XRD measurements and N. Lyadov for the EDX investigations.
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Talanov, Y., Sakhin, V., Kukovitskii, E. et al. Magnetic Resonance Study of the Bi2Te3 Doped with Manganese. Appl Magn Reson 48, 143–154 (2017). https://doi.org/10.1007/s00723-016-0853-x
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DOI: https://doi.org/10.1007/s00723-016-0853-x