Sol-Gel Synthesis and Structure-Property Relations in ZnxCu1-xBi2O4 (0≤ x ≤0.6) Spinels |
| Journal |
Solid State Phenomena (Volume 111) |
| Volume |
Science and Technology Hybrid Materials |
| Edited by |
Cheng-Jun Sun, Jun Ding, Manoj Gupta, Gan-Moog Chow, Lynn Kurihara and Lawrence Kabacoff |
| Pages |
31-34 |
| DOI |
10.4028/www.scientific.net/SSP.111.31 |
| Online since |
April, 2006 |
| Authors |
B.B. Das,
D. Lathabai
|
| Keywords |
Bismuth Trioxide, Cupric Oxide, EPR, Spinels |
| Abstract |
Studies on ZnxCu1-xBi2O4(0≤ x ≤0.6) spinels (S1-S5: x = 0.0, 0.15, 0.3, 0.45, 0.6) were done using varieties of structure sensitive techniques. The powder X-ray diffraction (XRD) studies shows formation of cubic phase, a=10.6023 Ǻ, space group, Ia3, Z=3 in all the samples. The IR spectral results show the presence of octahedral[CuO6/2] or [BiO6/2] units and Bi-O, Cu-O, and Zn-O
bonds in the samples. From the trend g║>g┴>ge(ge=2.0023) obtained from electron paramagnetic resonance(EPR) lineshapes simulation we conclude that the paramagnetic site in these glasses is Cu2+(3d9) which is in a tetragonally elongated octahedron [O1/2-CuO4/2-O1/2] exhibiting Jahn-Teller
distortion having D4h symmetry with orbital singlet 3dx 2-y 2(2B1g) as the ground state. |
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