Dielectric anomalies in Nd3+ doped Ba2NaNb5O15 laser crystal

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作者：
Torres, M.E. [1 ]
Kaminskii, A.A. [2 ]
González-Silgo, C. [3 ]
Platas, J. González [3 ]
Jaque, D. [4 ]
Ródenas, A. [4 ]
Martín, I.R. [5 ]
Lavín, V. [5 ]
机构：
[1] Dpto. Física Básica, Universidad de La Laguna, Avda. Astrofisico Fco. Sanchez s/n La Laguna, 38204, Spain
[2] V. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Moscow, 117333, Russia
[3] Dpto. Física Fundamental II, Universidad de La Laguna, Avda. Astrofisico Fco. Sanchez s/n La Laguna, 38204, Spain
[4] Dpto. Física de Materiales, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, 28049, Spain
[5] Dpto. Física Fundamental y Experimental, Electrónica y Sistemas, Universidad de La Laguna, Avda. Astrofisico Fco. Sanchez s/n La Laguna, 38204, Spain
来源：
Journal of Alloys and Compounds | 1600年 / 451卷 / 1-2期
关键词：
In the present study we analyze the thermal and dielectric behavior from 292 to 930 K of BNN doped with Nd3+ (1 at.%). The crystal was grown by the Czochralski method along the tetragonal axis. The complicated dielectric permittivity Ε{lunate}′r behavior; which depends on the cooling or heating process; was compared with the pure crystal. Two unexpected Ε{lunate}′r anomalies were detected around 318 and 847 K while the remaining transitions are in good agreement with the thermal expansion measurements. © 2007 Elsevier B.V. All rights reserved;
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