<sup>7</sup>Li NMR spectra and spin-lattice relaxation in lithium heptagermanate single crystal

Vogel, Michael; Petrov, Oleg V.; Trubitsyn, M. P.; Nesterov, О. O.; Volnianskii, M. D.

doi:10.1080/00150193.2020.1735888

Cited by 4 publications

(2 citation statements)

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“…Therefore, the activation energy inferred from spin relaxation as shown in Fig. 4 is often significantly lower (though never higher) 66–74 than that inferred from the temperature dependence of the self-diffusion coefficient or ionic conductivity. For LiC 6 , the difference between these two activation energies was roughly a factor of 2.…”

Section: Resultsmentioning

confidence: 78%

Lithium insertion in hard carbon as observed by ⁷Li NMR and XRD. The local and mesoscopic order and their relevance for lithium storage and diffusion

et al. 2022

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Section: Resultsmentioning

confidence: 78%

Lithium insertion in hard carbon as observed by ⁷Li NMR and XRD. The local and mesoscopic order and their relevance for lithium storage and diffusion

et al. 2022

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“…Previously, using macroscopic and local experimental techniques, charge transfer was studied in detail in lithium heptagermanate Li 2 Ge 7 O 15 [5,6] which had the similar crystal structure. Among other things, it was shown that small amounts of aliovalent dopants strongly influenced conductivity of Li 2 Ge 7 O 15 [7,8].…”

Section: Introductionmentioning

confidence: 99%

EPR of LiNaGe4O9:Mn crystal

Trubitsyn,

Sidak,

Panchenko

et al. 2023

J. Phys. Electron.

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EPR spectra of manganese ions were studied in lithium-sodium tetragermanate LiNaGe4O9 crystal. The observed spectrum was typical for doping ions in tetravalent Mn4+ state (3d 3, S=3/2) and for main orientations of static magnetic field along the crystal axes (T=296 K) consisted of hyperfine sextuplet from electronic transition Ms= +1/2 ↔ – 1/2. Transitions Ms= ±3/2 ↔±1/2 were not detected owing to strong interaction of the spin system with crystal field as compared with electron Zeeman interaction in the X frequency range of EPR registration. The angular variations of the spectrum were measured for static field B rotated in three main crystal planes. Since only central transition (Ms= +1/2 ↔ – 1/2) was detected and the splitting of the fine structure remained unknown, the spectrum was described in the approximation of effective spin Seff=1/2. The parameters of the spin Hamiltonian, including electron Zeeman and hyperfine interactions, were calculated. The magnetic multiplicity of the spectrum (km=2) evidenced that paramagnetic centers occupied the sites with monoclinic C2 point symmetry. Taking into consideration the positional symmetry as well ionic charges and radii of the guest ion and the hosts, it was concluded that paramagnetic Mn4+ centers substituted for Ge4+ within oxygen octahedral complexes in the crystal lattice of LiNaGe4O9.

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Ionic Conductivity in Single Crystals, Amorphous and Nanocrystalline Li2Ge7O15 Doped with Cr, Mn, Cu, Al, Gd

Trubitsyn

Коптєв²,

Volnianskii³

2023

Springer Proceedings in Physics

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⁷Li NMR spectra and spin-lattice relaxation in lithium heptagermanate single crystal

Cited by 4 publications

References 37 publications

Lithium insertion in hard carbon as observed by ⁷Li NMR and XRD. The local and mesoscopic order and their relevance for lithium storage and diffusion

Lithium insertion in hard carbon as observed by ⁷Li NMR and XRD. The local and mesoscopic order and their relevance for lithium storage and diffusion

EPR of LiNaGe4O9:Mn crystal

Ionic Conductivity in Single Crystals, Amorphous and Nanocrystalline Li2Ge7O15 Doped with Cr, Mn, Cu, Al, Gd

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7Li NMR spectra and spin-lattice relaxation in lithium heptagermanate single crystal

Cited by 4 publications

References 37 publications

Lithium insertion in hard carbon as observed by 7Li NMR and XRD. The local and mesoscopic order and their relevance for lithium storage and diffusion

Lithium insertion in hard carbon as observed by 7Li NMR and XRD. The local and mesoscopic order and their relevance for lithium storage and diffusion

EPR of LiNaGe4O9:Mn crystal

Ionic Conductivity in Single Crystals, Amorphous and Nanocrystalline Li2Ge7O15 Doped with Cr, Mn, Cu, Al, Gd

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⁷Li NMR spectra and spin-lattice relaxation in lithium heptagermanate single crystal

Lithium insertion in hard carbon as observed by ⁷Li NMR and XRD. The local and mesoscopic order and their relevance for lithium storage and diffusion

Lithium insertion in hard carbon as observed by ⁷Li NMR and XRD. The local and mesoscopic order and their relevance for lithium storage and diffusion