EPR and optical studies on transition metal doped LiRbB4O7 glasses

The structural and spectroscopic investigations of ternary tellurite glasses, doped with copper

“…(2) and (3) the spinHamiltonian parameters of all the glasses have been evaluated and are presented in Table 3. The EPR parameters of Cu 2+ ion in present glasses are compared with other oxide glasses and are in good agreement with earlier reported values [17][18][19][20][21][25][26][27]. It can be seen from Fig.…”

Photoacoustic spectroscopic and electron paramagnetic resonance investigations on copper doped alkali borosilicate glasses

“…The broadening of this band may be attributed to the super position of three-electron transition in d orbitals corresponding to 2 B 1 g 2 Eg, 2 B 1g 2 A 1g and 2 B 1g 2 B 2g transitions. As compared to literature reports, the peak is shifted towards lower wavelength regions (blue shifted) which is attributed to a different matrix and higher concentration of the Cu-ions [7]. Figure 2 shows the experimental and computer simulated EPR spectrum for the 2.5% Cu doped glass recorded at room temperature.…”

Effect of lattice defects in divalent lattices by incorporating trivalent ions in biominerals: An EPR study of Cr(III) in zinc(II) potassium phosphate hexahydrate

“…The space group is Pmn2 1 and there are two molecules per unit cell. The structure consists of PO 4 3-tetrahedra and the metal ion is surrounded by six water molecules in a very distorted octahedral configuration with metal -oxygen distances ranging from 2.046-2.1076 Å. None of the six Mg-O bonds are equal or the angles O-Mg-O are 90˚ or 180˚.…”

“…Also, Cr(III) is useful for obtaining information about the amorphous local environment in glasses [1,2,3,4,5,25]. Cr(III) ion is studied quite extensively by EPR spectroscopy in octahedral crystal fields due to its importance as MASER ion in ruby as well as tanning agent in leather industry [6,7,8,9].…”