Abstract
The scandium orthosilicate monocrystal Sc228SiO5 (SSO) doped with 51V isotope in small concentrations (0.005% at.) was studied. We used continuous wave (CW) and pulsed electron spin resonance (ESR) methods with frequencies in the X-band range (9.3–9.8 GHz). From the orientational dependencies of the CW ESR spectra we found the following: the hyperfine interaction of the vanadium ions is very anisotropic and the Zeeman interaction is almost isotropic with principal values of the g – tensor near electron g – factor. In addition to that, we found that the charge state of vanadium ions is V4+. The directions of the principal axes of the A and g tensors were determined. The phase memory and spin–lattice relaxation were measured. It was found that the temperature dependence of the spin–lattice relaxation time can be approximated by the sum of direct and Aminov–Orbach processes with decent accuracy. The phase memory time stays in the microseconds range even at the temperature T = 30 K.
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Authors acknowledge the financial support from the government assignment №122011800133–2 for FRC Kazan Scientific Center of Russian Academy of Sciences.
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R. F. Likerov wrote the main manuscript text, analyzed and processed the experimental data, prepared figures 1 - 6 and tables 1 - 2; R. M. Eremina reviewed the complete manuscript and assisted in the analysis of the experimental data; I. V. Yatsyk measured CW ESR spectra; K. B. Konov measured pulsed ESR spectra, relaxation times and their temperature dependencies; V. A. Shustov did XRD measurements and helped with sample structure identification; Yu. D. Zavartsev and S. A. Kutovoi were responsible for crystal growth procedures. All authors reviewed the manuscript
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Likerov, R.F., Eremina, R.M., Yatsyk, I.V. et al. Hyperfine effects and electron spin relaxation of 51V4+ doped into scandium orthosilicate Sc228SiO5: CW and pulsed X-band electron spin resonance studies. Appl Magn Reson 54, 477–489 (2023). https://doi.org/10.1007/s00723-022-01522-7
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DOI: https://doi.org/10.1007/s00723-022-01522-7