Correlation between the Structures of GeS Glasses and that of Impurity Mn²⁺ Complexes

Abstract

EPR method is used to study the Mn impurity in glass system (GeS),(GeS,)loo-, for 0 5 z 5 80.Three types of M n 2 + centers homogeneously incorporated in the glass network are found. They have different coordination numbers and different magnitude and symmetry of crystal field. The dependence of the parameters of Mn2+ EPR spectra on glass composition is obtained for every Mn2+ center. The results are compared with known glass structure data.MeTOnOM 3nP HccJIeAoBaHo noBeAeHHe IIpHMeCH Mn B CTeKJIaX CHCTeMbl (GeS),(GeSz)ioo--z, 0 5 Z 5 80. 0 6~a p y m e~o TPII THlIa UeHTpOB & h 2 + , OTJIU%UOUIIXCfi KOOpAHHaUHOH-CHMOCTH napaMeTpoB cneKTpoB 3nP Mn2+ OT cocTaBa cTema AJIH p a a n a s~~x IleHTPOB l ) Leninskii Gory, SU-119899 Moscow, USSR. 2, SU-199 164 Leningrad, USSR.

Electron Spin Resonance and Electron Spin Echo Modulation Spectroscopy of Aluminophosphate-Based Mesoporous Molecular Sieve Containing Framework Manganese

“…It is striking that the g ) 4.30 peak associated with Mn 2+ varies so much in intensity with adsorbates and between MnUHM-1 (Figure 5) and Mn-UHM-1 (Figure 6). The interpretation of this g ) 4.30 peak is somewhat controversial [29][30][31][32][33][34] although it can be ascribed to transitions in the M s ) ( 3 / 2 doublet for a high-spin S ) 3 / 2 system in a rhombic ligand field. 33,34 The intensity changes may be related to the degree of rhombic distortion of the Mn 2+ environment, but we have been unable to relate this to any specific local structural model thus far.…”

Nature of electrical transport in ambipolar amorphous semiconductors (PbS) x (GeS)0.7-x (GeS2)0.3

“…This property is attributed to the presence of Ge/S dangling bonds. In a recent study (Zhilinskaya, Lazukin, Bychkaov and Rosenkov 1988) of Mn impurity in the glass system (GeS), (GeS,),,, -, (0 < x < 80) using the ESR method, three types of Mn2 + centres homogeneously incorporated in the glass network have been found. Appearance of each Mn2+ centre is connected with the existence of certain structural units in the host Ge-S glass network.…”