A5068240056- Solid-state spectroscopy and crystallography
- Inorganic Fluorides and Related Compounds
- Luminescence Properties of Advanced Materials
- Ferroelectric and Piezoelectric Materials
- Advanced NMR Techniques and Applications
- Acoustic Wave Resonator Technologies
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Electron Spin Resonance Studies
- Semiconductor materials and interfaces
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Semiconductor materials and devices
- Nitric Oxide and Endothelin Effects
- Atomic and Subatomic Physics Research
- Diamond and Carbon-based Materials Research
- Carbon Nanotubes in Composites
- Radiation Detection and Scintillator Technologies
- Microwave Dielectric Ceramics Synthesis
- Advancements in Battery Materials
- Lanthanide and Transition Metal Complexes
- Glass properties and applications
- Electronic and Structural Properties of Oxides
- Physics of Superconductivity and Magnetism
- Photoreceptor and optogenetics research
Kazan Federal University
2007-2024
Institute of Physics
2014
Ghent University
2007-2012
Max Planck Institute for Polymer Research
2012
Max Planck Society
2012
Kazan State Medical University
2006
Kazan E. K. Zavoisky Physical-Technical Institute
2003-2005
${\mathrm{SrEr}}_{2}{\mathrm{O}}_{4}$ is a geometrically frustrated magnet which demonstrates rather unusual properties at low temperatures including coexistence of long- and short-range magnetic order, characterized by two different propagation vectors. In the present work, effects crystal fields (CFs) in this compound containing four magnetically inequivalent erbium sublattices are investigated experimentally theoretically. We combine measurements CF levels ${\mathrm{Er}}^{3+}$ ions made...
In this paper, new steps toward a better understanding and utilization of high-pressure high-temperature nanodiamonds (NDs) containing nitrogen-vacancy (NV) centers have been taken. NV–-related long-term luminescence oxygenated particles increased in comparison to plasma hydrogenated NDs' NV– luminescence. The optically detected electron spin resonance process can be also significantly affected by ND termination. For H-terminated the NV0 conversion energy is lower than excitation energy, so...
We report the first observation of Rabi oscillations in spin-7/2 ensemble trivalent gadolinium ions hosted CaWO$_4$ single crystal. A number transitions within lowest electronic multiplet $^8S_{7/2}$ Gd$^{3+}$ ion are studied using a combination continuous-wave and pulsed electron paramagnetic resonance spectroscopy. The corresponding damping curves spin coherence times detected at varying strengths microwave field. These data well reproduced by theoretical model which accounts for intrinsic...
The electron paramagnetic resonance angular dependences for ${\mathrm{Gd}}^{3+}$ and ${\mathrm{Ce}}^{3+}$ centers in ${\mathrm{K}}_{2}\mathrm{Y}{\mathrm{F}}_{5}$ crystals show that the ${\mathrm{Y}}^{3+}$ site has monoclinic ${C}_{h}$ symmetry these crystals. This is compatible with crystal structure having Pnam space group. From zero-field splitting parameters of center, it deduced sites close to trigonal around $b$ axis, distorted by overall orthorhombic structure. information required...
The structure of Eu${}^{2+}$ monomer centers in CsBr single crystals is investigated using electron paramagnetic resonance (EPR) spectroscopy. These are produced by heating the melt-grown above 600 K vacuum followed a rapid quench to room temperature (RT) or 77 K. angular dependence their EPR spectrum demonstrates that these have cubic symmetry. At RT decays aggregation ions. This strongly contrasts with situation for CsBr:Eu needle image plates synthesized physical vapor deposition, where...
We study coherent dynamics in a system of dipolar coupled spin qubits diluted solid and subjected to driving microwave field. In the case rare earth ions, an anisotropic crystal background results $g$ tensor thus modifies coupling. develop microscopic theory relaxation transient regime for frequently encountered axially symmetric The calculated decoherence rate is nonlinear Rabi frequency. show that direction static magnetic field corresponds highest factor preferable order obtain higher...
X-Ray irradiation at room temperature produces several paramagnetic centres in rare-earth activated K2YF5 crystals, whose thermal annealing behaviour can be linked with the occurrence of thermoluminescence (TL) glow peaks. In this paper, continuous wave (CW) and pulsed resonance techniques are used to study structure a very stable radiation-induced centre, which may involved TL peak ∼390 °C reported for Ce- Tb-activated crystals. From spectra centre's g tensor hyperfine (nuclear quadrupole)...
A high-frequency/high-magnetic field (94 GHz/3.3 T) electron paramagnetic resonance (EPR) and electron-nuclear double (ENDOR) study of monocrystalline nanodiamonds (ND) is carried out. Influence the hydrogen fluorine modification ND surface on EPR ENDOR signals from superficial bulk centers observed. The effect shows that could serve as intrinsic probe despite deep localization, shielding environment two-layered diamond nanoparticle.
X-ray irradiation at 77 K produces signals from several trapped hole and/or electron centers in the electron-paramagnetic-resonance (EPR) spectra of rare-earth-doped ${\text{K}}_{2}{\text{YF}}_{5}$. Five spectral components have a structure typical center with spin $S=\frac{1}{2}$ exhibiting strong hyperfine interaction two nearly equivalent $^{19}\text{F}$ nuclei. They are identified as $V$- or $H$-type intrinsic-trapped centers, having ${\text{F}}_{2}^{\ensuremath{-}}$ molecular anion...
We report a detailed study of electron longitudinal and transverse spin relaxation times for Li donors in monoisotopic 28 Si over the temperature range 4–20 K using continuous wave pulsed paramagnetic resonance. Comparison obtained spin-lattice states isolated donor center lithium complex LiO showed that due to presence orbital degeneracy, is faster single than complexes with nondegenerate ground state. For silicon well described by Blume-Orbach process, parameters spin-orbit coupling ~ 1·10...