Electron paramagnetic resonance of Dy3+ ions in lead thiogallate single crystals

Abstract

The results of electron paramagnetic resonance (EPR) studies of Dy 3+ ions in lead thiogallate PbGa 2 S 4 single crystals have been presented. It has been shown that the ground state of these ions corre sponds to the lowest Stark sublevel Γ 6 of the term 6 H 15/2 . The spectra are well described by the axially sym metric spin Hamiltonian with the effective spin S = 1/2 with the factors g || = 15.06 and g ⊥ = 2.47. The Dy 3+ ions substitute Pb 2+ ions in the crystal lattice of PbGa 2 S 4 . The observed hyperfine structure has allowed to unambiguously interpret the EPR spectra. The hyperfine interaction constants of two odd isotopes of dyspro sium in lead thiogallate single crystals have been found to be A || = 675 × 10 -4 cm -1 and A ⊥ = 111 × 10 ⎯4 cm -1 for 163 Dy and A || = 472 × 10 -4 cm -1 and A ⊥ = 77 × 10 -4 cm -1 for 161 Dy.

Applications of Atomistic Simulation in Ceramics and Metals

“…The space group is Ia3d. [17,18] In addition, earlier study by Kuklja et al [19] reveals that the formation of defect complexes, such as an interstitial and the corresponding vacancy, requires much more energy compared to that for antisite formation. The crystalline structure of YAG is shown in Figure 3.5.…”

“…18 Galvanic corrosion of a magnesium bracket fastened by steel bolt to car transmission box Applications of Atomistic Simulation in Ceramics and Metals belongs to PVD. In the second step, vapors transport from the source to the substrate.…”

INTERACTION IN THE SYSTEM CuGaS2–PbGa2S4

“…It is known that ternary sulphides CuGaS 2 and PbGa 2 S 4 exhibit unique physical properties (photosensitivity, induced approximate photoeffects, photoelectric memory, luminescence and other) [1][2][3][4], which also have an applied value in various fields of electronics and before first of all for photoelectronics.…”

“…Unlike [5], in the work [6] it was established that PbGa 2 S 4 and Pb 2 Ga 2 S 5 melt congruently at 1163 and 1033 К, correspondingly, and the whole system PbS-Ga 2 S 3 acts like the systems Cu 2 S-Ga 2 S 3 [7] and SrS-Ga 2 S 3 [8]. According to [2], PbGa 2 S 4 is a phase of a variable composition. Compound PbGa 2 S 4 belongs to structural type of EuGa 2 S 4 and is crystallized in rhombic syngony (а=20.44, b=20.64, c=12.09 Å.…”