scholarly journals Dielectric relaxation and relaxor behavior in bilayered perovskites

2009 ◽  
Vol 94 (26) ◽  
pp. 262903 ◽  
Author(s):  
Y. González-Abreu ◽  
A. Peláiz-Barranco ◽  
E. B. Araújo ◽  
A. Franco Júnior
Keyword(s):  
Dielectric Relaxation ◽  
Relaxor Behavior

Relaxor behavior and dielectric relaxation in Pb(Ba1/3Nb2/3)O3: A phase pure new relaxor material

2011 ◽  
Vol 109 (1) ◽  
pp. 014114 ◽  
Author(s):  
P. K. Bajpai ◽  
Mukul Pastor ◽  
K. N. Singh
Keyword(s):  
Dielectric Relaxation ◽  
Relaxor Behavior ◽  
Phase Pure

Dielectric Relaxation and Relaxor Behavior of Ferroelectric 0.8PbFe0.5Ta0.5O3-0.2PbTiO3 Ceramics

2007 ◽  
Vol 51 (12) ◽  
pp. 133 ◽  
Author(s):  
Jin Soo KIM ◽  
Jung Hyun JEONG ◽  
Sung Yong CHO ◽  
M. S. JANG ◽  
Sang-Bock CHO
Keyword(s):  
Dielectric Relaxation ◽  
Relaxor Behavior

DEGREE OF DIFFUSED PHASE TRANSITION AND NON-DEBYE DIELECTRIC RELAXATION INBa(NdxTi1-2xNbx)O3CERAMICS

2005 ◽  
Vol 19 (26) ◽  
pp. 1335-1346 ◽  
Author(s):  
SYED MAHBOOB ◽  
G. PRASAD ◽  
G. S. KUMAR ◽  
A. R. JAMES ◽  
CHANDRA PRAKASH
Keyword(s):  
Phase Transition ◽  
Dielectric Relaxation ◽  
Lattice Site ◽  
Dielectric Behavior ◽  
Relaxor Behavior ◽  
Dielectric Measurements ◽  
Temperature Range ◽  
Arrhenius Relation ◽  
Diffused Phase Transition ◽  
Cationic Disorder

Dielectric measurements were made over the temperature range 80–300 K at different frequencies (10 kHz, 50 kHz, 100 kHz, 500 kHz and 1 MHz). The degree of relaxor behavior and diffuseness of phase transition were correlated to the cationic disorder at lattice site B. Non-Debye dielectric behavior was observed in the present samples and a modified Arrhenius relation proposed by Chen et al. was found to best describe the frequency dependent dielectric maxima temperature.

Dielectric relaxation modes in bismuth-dopedSrTiO3: The relaxor behavior

1999 ◽  
Vol 59 (10) ◽  
pp. 6670-6674 ◽  
Author(s):  
Chen Ang ◽  
Zhi Yu ◽  
P. Lunkenheimer ◽  
J. Hemberger ◽  
A. Loidl
Keyword(s):  
Dielectric Relaxation ◽  
Relaxor Behavior ◽  
Relaxation Modes

Elastic and relaxor behavior in nanocrystalline La-modified PZT-films

1998 ◽  
Vol 08 (PR9) ◽  
pp. Pr9-125-Pr9-128 ◽  
Author(s):  
M. Marx ◽  
J. K. Krüger ◽  
R. Birringer ◽  
H. Schmitt ◽  
R. Holtwick ◽  
...  
Keyword(s):  
Relaxor Behavior ◽  
Pzt Films

Dielectric Relaxation Studies of Silver Nanoparticles dispersed Liquid Crystal

2015 ◽  
Vol 8 (3) ◽  
pp. 2176-2188 ◽  
Author(s):  
Keisham Nanao Singh
Keyword(s):  
Activation Energy ◽  
Silver Nanoparticles ◽  
Liquid Crystal ◽  
Dielectric Relaxation ◽  
Relaxation Process ◽  
Relaxation Times ◽  
Low Frequency ◽  
Bulk Liquid ◽  
Molecular Rearrangement ◽  
Relaxation Studies

This article reports on the Dielectric Relaxation Studies of two Liquid Crystalline compounds - 7O.4 and 7O.6 - doped with dodecanethiol capped Silver Nanoparticles. The liquid crystal molecules are aligned homeotropically using CTAB. The low frequency relaxation process occurring above 1 MHz is fitted to Cole-Cole formula using the software Dielectric Spectra fit. The effect of the Silver Nanoparticles on the molecular dipole dynamics are discussed in terms of the fitted relaxation times, Cole-Cole distribution parameter and activation energy. The study indicate a local molecular rearrangement of the liquid crystal molecules without affecting the order of the bulk liquid crystal molecules but these local molecules surrounding the Silver Nanoparticles do not contribute to the relaxation process in the studied frequency range. The observed effect on activation energy suggests a change in interaction between the nanoparticles/liquid crystal molecules.

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