Electron Paramagnetic Resonance and Optical Absorption Studies on Copper Ions in Mixed Alkali Cadmium Phosphate Glasses

材料科学技术（英文）, 2009, 25(4): 531-534.

^1, , ^2, , ^3, , ^4,

1.Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar-522 510, India

2.Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar-522 510, India

3.Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar-522 510, India

4.Department of Chemistry, Pondicherry University, Pondicherry-605 014, India

基金项目: Indian Institute of Sciences, Bangalore and Central Instrumentation Laboratory, University of Hyderabad, Hyderabad for recording various spectra of glass samples indebted to the Director, Centralized Laboratory, Acharya Nagarjuna University, Nagarjuna Nagar

Electron Paramagnetic Resonance and Optical Absorption Studies on Copper Ions in Mixed Alkali Cadmium Phosphate Glasses

G.Giridhar ^1, , M.Rangacharyulu ^2, , R.V.S.S.N.Ravikumar ^3, , P.Sambasiva Rao ^4,

1.Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar-522 510, India

2.Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar-522 510, India

3.Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar-522 510, India

4.Department of Chemistry, Pondicherry University, Pondicherry-605 014, India

Keywords： Glasses

Electron paramagnetic resonance (EPR) and optical absorption studies were carried out at room temperature on copper doped mixed alkali cadmium phosphate (LiNaCdP) glasses to understand the nature and symmetry of dopant. Three samples with varying concentrations of alkali ions have been prepared. The spin Hamiltonian parameters obtained from room temperature EPR spectra are: g||=2.437, g⊥=2.096, A||=117×10-4 cm-1, A⊥=26×10-4 cm-1 for LiNaCdP1, g||=2.441, g⊥=2.088, A||=121×10-4 cm-1, A⊥=25×10-4 cm-1 for LiNaCdP2 and g||=2.433, g⊥=2.096, A||=125×10-4 cm-1, A⊥=32×10-4 cm-1 for LiNaCdP3. These EPR results indicate that the dopant Cu2+ ion enters the glass matrix into a tetragonally elongated octahedral site. The bonding parameters evaluated by correlating optical and EPR data suggest that bonding between the central metal ion and ligands is partially covalent. The mixed alkali effect in cadmium phosphate glasses was reported.

参考文献

[1]	J O Isard .[J].Journal of Non-Crystalline Solids,1969,1:235.
[2]	D E Day .[J].Journal of Non-Crystalline Solids,1976,21:343.
[3]	J W Wiench;B Tischendorf;J U Otaigbe;M Pruski .[J].Journal of Molecular Structure,2002,602:145.
[4]	N S Rao;S Bale;M Purnima;K S Kumar S Rahman .[J].Bulletin of Materials Science,2005,28:589.
[5]	R.V.S.S.N.Ravikumar;B.C. Jamalaiah .Optical absorption and EPR spectral studies on vanadyl doped zinc phosphate glass[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(1/2):84-86.
[6]	R V S S N Ravikumar;A V Chandrasekhar;B J Reddy;Y P Reddy .[J].Asian Journal of Physics,1999,8:223.
[7]	R. V. S. S. N. Ravikumar;V. Rajagopal Reddy;A. V. Chandrasekhar .Tetragonal site of transition metal ions doped sodium phosphate glasses[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(1/2):272-276.
[8]	A.V. Chandrasekhar;R.V.S.S.N. Ravikumar;B.J. Reddy .Distorted octahedral sites of Cr~(3+) doped sodium phosphate glasses[J].Glass Technology,2002(1):32-33.
[9]	A V Chandrasekhar;R V S S N Ravikumar;B J Reddy;Y P Reddy P S Rao .[J].Physics and Chemistry of Glasses,2002,43:173.
[10]	R V S S N Ravikumar;R Komatsu;K Ikeda;A V Chandrasekhar B J Reddy Y P Reddy P S Rao .[J].Solid State Comunm,2003,126:251.
[11]	R V S S N Ravikumar;K Ikeda;A V Chandrasekhar;Y P Reddy P S Rao J Yamauchi .[J].Journal of Physics and Chemistry of Solids,2003,64:2433.
[12]	R.V.S.S.N. Ravikumar;A.V. Chandrasekhar;L. Ramamoorthy .Spectroscopic studies of transition metal doped sodium phosphate glasses[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):176-179.
[13]	R V S S N Ravikumar;J Yamauchi;A V Chandrasekhar;Y P Reddy P S Rao .[J].Journal of Molecular Structure,2005,740:169.
[14]	R P Sreekanth Chakradhar;B Yasoda;J Lakshmana Rao;N O Gopal .[J].Journal of Non-Crystalline Solids,2006,352:3864.
[15]	R P Sreekanth Chakradhar;K P Ramesh;J L Rao;J Ramakrishna .[J].Journal of Physics Condensed Matter,2003,15:1469.
[16]	R. P. Sreekanth Chakradhar;B. Yasoda;J. Lakshmana Rao;N.O. Gopal .Mixed alkali effect in Li_2O-Na_2O-B_2O_3 glasses containing Fe_2O_3-An EPR and optical absorption study[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2006(9):1646-1656.
[17]	R P Sreekanth Chakradhar;B Yasoda;J L Rao;N O Gopal .[J].Journal of Non-Crystalline Solids,2007,353:2355.
[18]	D Viviani;A Faivre;C Levelut;M Smaihi .[J].Journal of Physical Chemistry B,2006,110:7281.
[19]	A Abragam;M H L Pryce .[J].P Roy Soc Lond A-Mat,1951,205:135.
[20]	R V S S N Ravikumar;R Komatsu;K Ikeda;A V Chandrasekhar B J Reddy Y P Reddy P S Rao .[J].Journal of Physics and Chemistry of Solids,2003,64:261.
[21]	R V S S N Ravikumar;R Komatsu;K Ikeda;A V Chandrasekhar L Ramamoorthy B J Reddy Y P Reddy P S Rao .[J].Physica B,2003,334:398.
[22]	D Kivelson;R Neiman .[J].Journal of Chemical Physics,1961,35:149.
[23]	K E Falk;E Ivaniva;B Roos;T Vanngard .[J].Inorganic Chemistry,1970,9:556.
[24]	J H Van Vleck .[J].Physical Review,1932,41:208.
[25]	H Kawazoe;H Hosono;T Kanazawa .[J].Journal of Non-Crystalline Solids,1978,29:173.

上一张下一张

计量

下载量()
访问量()

作者相关

在本站搜索
在百度学术搜索
在万方数据库搜索
在CNKI搜索

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网

Electron Paramagnetic Resonance and Optical Absorption Studies on Copper Ions in Mixed Alkali Cadmium Phosphate Glasses

参考文献