Diffused phase transition and relaxor behavior in Pb(Fe2∕3W1∕3)O3 thin films

2007 ◽  
Vol 90 (16) ◽  
pp. 162903 ◽  
Author(s):  
Ashok Kumar ◽  
N. M. Murari ◽  
R. S. Katiyar
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Relaxor Behavior ◽  
Diffused Phase Transition

Diffuse phase transition and relaxor behavior in (PbLa)TiO3 thin films

2002 ◽  
Vol 80 (21) ◽  
pp. 3997-3999 ◽  
Author(s):  
S. Bhaskar ◽  
S. B. Majumder ◽  
R. S. Katiyar
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Diffuse Phase Transition ◽  
Relaxor Behavior ◽  
Diffuse Phase

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.

Field Induced Dielectric Properties of 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 Thin Films

2002 ◽  
Vol 748 ◽  
Author(s):  
Apurba Laha ◽  
S. Saha ◽  
S. B. Krupanidhi
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Long Range ◽  
Bias Voltage ◽  
Frequency Dispersion ◽  
Dielectric Maximum ◽  
Diffused Phase Transition ◽  
Relaxor Property

ABSTRACTDC electric field induced dielectric properties of 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) thin films were studied as a function of frequency at different temperatures. It was observed that the dielectric constant (ε) and dissipation factor (tanδ) were decreased in presence of bias field. The temperature of dielectric maxima was found to increase with increasing bias level. The low temperature (<Tm) frequency dispersion of dielectric permittivity was suppressed with the application of dc bias. After a certain bias voltage the relaxor property of films was disappeared i.e. the films exhibited normal ferroelectric behavior. Since the absence of long range interaction among the nanopolar clusters in PMN and its family is believed to be the origin of relaxor behavior, disappearance of relaxor nature in PMN-PT (70/30) films could be attributed to manifestation of long-range order at higher bias voltage. This was observed in the temperature dependence of dielectric constant i.e. the films neither exhibited any frequency dispersion in the temperature of dielectric maximum (Tm) nor showed any diffused phase transition. The relaxor property of PMN-PT thin films was studied in terms of diffused phase transition together with frequency dispersion of the temperature of dielectric maximum (Tm). Vogel-Fulcher relation was used to analyze the frequency dependence of temperature of dielectric maximum.

Dielectric Studies of laser ablated Ca doped BaTiO3 thin films.

2002 ◽  
Vol 748 ◽  
Author(s):  
P. Victor ◽  
R. Ranjith, Asis Sarkar ◽  
R. Vinayak ◽  
S. Saha ◽  
S. B. Krupanidhi
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Room Temperature ◽  
Compositional Analysis ◽  
Optical Storage ◽  
Calcium Titanate ◽  
Relaxor Behavior ◽  
Dielectric Studies ◽  
Laser Technique ◽  
Si Substrates

ABSTRACTRecently, there has been growing interest in Ca modified BaTiO3 structures due to their larger electro-optic coefficients for their use in optical storage of information over conventional BaTiO3 crystals. Barium Calcium Titanate (BCT) shows promising applications in advanced laser systems, optical interconnects and optical storage devices. BaTiO3 thin films of varied Ca (3 at. % - 15 at. %) doping were deposited using pulsed laser ablation (KrF excimer laser) technique over Pt/Si substrates. The stoichiometric and the compositional analysis were carried out using EDAX and SIMS. The dielectric studies were done at the frequency regime of 40 Hz to 100 kHz at different ambient temperatures from 200 K to 600 K. The BCT thin films exhibited diffuse phase transition, which was of a typical non lead relaxor behavior and had high dielectric constant and low dielectric loss. The phase transition for the different compositions of BCT thin films was near the room temperature, showing a marked departure from the bulk phase transition. The C - V and the hysteresis behavior confirmed the ferroelectric nature below the phase transition and paraelectric at the room temperature.

scholarly journals Modulating the phase transition temperature of giant magnetocaloric thin films by ion irradiation

2017 ◽  
Vol 1 (6) ◽  
Author(s):  
S. Cervera ◽  
M. Trassinelli ◽  
M. Marangolo ◽  
C. Carrétéro ◽  
V. Garcia ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Transition Temperature ◽  
Phase Transition Temperature ◽  
Ion Irradiation

Strain Control of Phase Transition and Exchange Bias in Flexible Heusler Alloy Thin Films

2021 ◽  
Author(s):  
Yechao Ling ◽  
Yong Hu ◽  
Haobo Wang ◽  
Ben Niu ◽  
Jiawei Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Exchange Bias ◽  
Heusler Alloy ◽  
Strain Control

Amorphous-to-crystalline phase transition of (InTe)x(GeTe) thin films

2010 ◽  
Vol 108 (2) ◽  
pp. 024506 ◽  
Author(s):  
Ki-Ho Song ◽  
Seung-Cheol Beak ◽  
Hyun-Yong Lee
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Crystalline Phase ◽  
Crystalline Phase Transition

Orientation control of phase transition and ferroelectricity in Al-doped HfO2 thin films

2021 ◽  
pp. 111114
Author(s):  
Hei Man Yau ◽  
Xinxin Chen ◽  
Chi Man Wong ◽  
Deyang Chen ◽  
Jiyan Dai
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Orientation Control

Cr doping-induced structural phase transition, optical tuning and magnetic enhancement in BiFeO3 thin films

2017 ◽  
Vol 186 ◽  
pp. 198-201 ◽  
Author(s):  
Benlong Guo ◽  
Hongmei Deng ◽  
Xuezhen Zhai ◽  
Wenliang Zhou ◽  
Xiankuan Meng ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Bifeo3 Thin Films ◽  
Magnetic Enhancement ◽  
Cr Doping
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