Effects of Gd3+ : Ag co-doping on structural and magnetic properties of lead tellurite glass ceramics

被引:9
作者
Bosca, M. [1 ]
Pop, L. [1 ]
Bolundut, L. [1 ]
Tothazan, N. [1 ]
Borodi, G. [2 ]
Vida-Simiti, I. [1 ]
Stefan, R. [3 ]
Popa, A. [2 ]
Culea, E. [1 ]
Pascuta, P. [1 ]
机构
[1] Tech Univ Cluj Napoca, Cluj Napoca 400641, Romania
[2] Natl Inst Res & Dev Isotop & Mol Technol, Cluj Napoca 400293, Romania
[3] Univ Agr Sci & Vet Med, Cluj Napoca 400372, Romania
关键词
Lead-tellurite glass ceramics; Gadolinium ions; XRD; EPR; Magnetic susceptibility; OPTICAL-PROPERTIES; SPECTROSCOPIC PROPERTIES; GADOLINIUM IONS; BORATE GLASSES; EPR; SUSCEPTIBILITY; RESONANCE; BEHAVIOR; SYSTEM;
D O I
10.1016/j.ceramint.2015.09.047
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Lead tellurite glass ceramics doped with variable amounts of Gd3+ ions and co-doped with fixed amounts of silver (Ag2O or Ag metallic nanoparticles, AgNPs) have been prepared and investigated by X-ray diffraction (XRD), density, electron paramagnetic resonance (EPR) and magnetic susceptibility measurements. The EPR spectra of the studied samples exhibit the typical "U"-type shape with effective g-values of approximate to 6, 2.8, 2.0 and a weaker feature at g approximate to 4.8. At higher contents of Gd3+ ions the spectral features are broadened and finally are dominated by a broad absorption line located at g approximate to 2.0 and a weaker feature at g approximate to 6. The broad EPR line centered at g approximate to 2.0 is associated to the Gd3+ ions present predominantly as clustered species. The paramagnetic susceptibility (chi) was measured at various temperatures and from the 1/chi versus T dependence the molar Curie constant (Cm) and the paramagnetic Curie temperature (theta(P)) have been evaluated. Magnetic susceptibility data show that for low Gd2O3 contents, x <= 3 mol%, the Gd3+ ions are randomly distributed in the host glass ceramics matrix and are present only as isolated species. For higher Gd2O3 contents, x > 3 mol%, the Gd3+ ions appear as both isolated and antiferromagnetically coupled species. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:1169 / 1176
页数:8
相关论文
共 33 条
[1]  
Accelrys Software Inc, 2010, MAT STUD REL 5 5
[2]   EPR and magnetic susceptibility studies of B2O3-Bi2O3-Gd2O3 glasses [J].
Ardelean, I. ;
Griguta, Lidia .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2007, 353 (24-25) :2363-2366
[3]   MAGNETIC-PROPERTIES OF XGD2O3(1-X)[3B2O3PBO] GLASSES [J].
ARDELEAN, I ;
BURZO, E ;
MITULESCUUNGUR, D ;
SIMON, S .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1992, 146 (2-3) :256-260
[4]   EPR study of Gd3+ doped lead oxide based glasses [J].
Azzoni, CB ;
Di Martino, D ;
Paleari, A ;
Speghini, A ;
Bettinelli, M .
JOURNAL OF MATERIALS SCIENCE, 1999, 34 (16) :3931-3935
[5]   Influence of Sm3+:Ag codoping on structural and spectroscopic properties of lead tellurite glass ceramics [J].
Bolundut, Liviu ;
Culea, Eugen ;
Borodi, Gheorghe ;
Stefan, Razvan ;
Munteanu, Constantin ;
Pascuta, Petru .
CERAMICS INTERNATIONAL, 2015, 41 (02) :2931-2939
[6]   Preparation and and characterization of TeO2-WO3-Li2O glasses [J].
Celikbilek, M. ;
Ersundu, A. E. ;
Aydin, S. .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2013, 378 :247-253
[7]   Structural, optical and magnetic properties of Fe3O4 sputtered TeO2-PbO-B2O3 and PbO-Bi2O3-B2O3 glasses for sensing applications [J].
Chen, Qiuling ;
Wang, Hui ;
Perero, Sergio ;
Wang, Qingwei ;
Chen, Qiuping .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 2015, 408 :43-50
[8]   Spectroscopic and magnetic behaviour of xGd2O3 (1-x)(Bi2O3 •PbO) glasses [J].
Culea, E ;
Pop, L ;
Simon, S .
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2004, 112 (01) :59-63
[9]   Effects of Er3+ :Ag codoping on structural and spectroscopic properties of lead tellurite glass ceramics [J].
Culea, Eugen ;
Vida-Simiti, Ioan ;
Borodi, Gheorghe ;
Culea, Eugen Nicolae ;
Stefan, Razvan ;
Pascuta, Petru .
CERAMICS INTERNATIONAL, 2014, 40 (07) :11001-11007
[10]   Structural and spectroscopic effects of Ag-Eu3+ codoping of TeO2-PbO glass ceramics [J].
Culea, Eugen ;
Vida-Simiti, Ioan ;
Borodi, Gheorghe ;
Culea, Eugen Nicolae ;
Stefan, Razvan ;
Pascuta, Petru .
JOURNAL OF MATERIALS SCIENCE, 2014, 49 (13) :4620-4628