Electron spin echo and spin relaxation of low-symmetry Mn2+-complexes in ammonium oxalate monohydrate single crystal

Resonance local phonon mode and electron spin-lattice relaxation of formate-type free radicals studied by electron spin echo in Cd(HCOO)2·2H2O crystal

“…It can be described as a damped harmonic oscillator. Spin-lattice relaxation via localized phonons of energy Δ L with Δ L > Θ D have been theoretically considered [46][47][48][49] and identified experimentally in various solids [47,[50][51][52][53][54][55][56][57]. However, in most theoretical approaches the low temperature dependence of…”

“…The vibrational energy ω ℏ R values for formate radicals in our crystal are similar to the energies determined for various radicals formed by ionizing radiation in diamagnetic crystals (table 2). Paramagnetic ions doped to a diamagnetic lattice can relax also via local mode as it was suggested for Cu 2+ [1] and Mn 2+ ions [57,66].…”

Phonon spectrum, electron spin–lattice relaxation and spin–phonon coupling of Cu2+ ions in BaF2 crystal

“…When different Raman relaxation processes predicting various 1/T 1 temperature dependence (T 5 , T 7 , T 9 ) are considered, the calculated G-value can discriminate between them or can exclude those which lead to non-realistic G-value [59] …”