19 research outputs found
Inhomogeneity of the intrinsic magnetic field in superconducting YBa2Cu3OX compounds as revealed by rare-earth EPR-probe
X-band electron paramagnetic resonance on doped Er3+ and Yb3+ ions in
Y0.99(Yb,Er)0.01Ba2Cu3OX compounds with different oxygen contents in the wide
temperature range (4-120)K have been made. In the superconducting species, the
strong dependencies of the linewidth and resonance line position from the sweep
direction of the applied magnetic field are revealed at the temperatures
significantly below TC. The possible origins of the observed hysteresis are
analyzed. Applicability of the presented EPR approach to extract information
about the dynamics of the flux-line lattice and critical state parameters
(critical current density, magnetic penetration depth, and characteristic
spatial scale of the inhomogeneity) is discussedComment: 17 pages, 5 Figures. Renewed versio
Pulsed electron-nuclear double resonance diagnostics of Ce<sup>3+</sup> emitters in scintillating garnets
© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimPulsed electron paramagnetic resonance (EPR) and pulsed electron-nuclear double resonance (ENDOR) techniques have been applied to study the environment of luminescent Ce3+ ions in garnet based scintillator powders and ceramics. The presence of aluminum and gallium isotopes with large nuclear magnetic and quadrupole moments in the nearest neighborhood of the Ce3+ ion allows for the use of the hyperfine and quadrupole interactions with these ions for determination of the unpaired electron spatial distribution and the definition of the electric field gradient at the aluminum and gallium sites. Pulsed EPR and ENDOR techniques made it possible to study the coherent properties of the Ce3+ spin system in garnet powders and ceramics, which is important for spin manipulation on Ce3+ centers
Detection of directed electron-hole recombination energy transfer from an ionic crystal matrix to self-assembled nanocrystals
RECOMBINATION PROCESSES IN SYSTEMS BASED ON IONIC CRYSTALS WITH EMBEDDED SELF-ORGANIZED NANOCRYSTALS
KCl crystals with a silver impurity: From point defects to oriented AgCl microcrystals in a crystalline host
Identification of recombination centers in wide-band-gap crystals and related nanostructures from spin-dependent tunneling afterglow
From Röntgen to Ioffe, from Giessen to Saint Petersburg — Relations between Russian and German physics
Recent researches of the copper centres in potassium tantalate single crystals
Electron paramagnetic resonance (EPR) of single. Cu(2+) ions and exchange-coupled Cu(2+)-Cu(2+) pairs in KTaO(3), KTaO(3):Li:Cu and KTaO(3):Li:Nb crystals has been analyzed in the temperature range of 300 - 1000 K. The temperature stability of the paired centers was found to be similar to that of single Cu(2+) ions. The influence of oxygen vacancies on the Cu(2+) EPR spectra was studied