Ferroelectric phase transition and electrical properties of high-TC PMN-PH-PT ceramics prepared by partial oxalate route

2018 ◽  
Vol 38 (4) ◽  
pp. 1463-1472 ◽  
Author(s):  
Rongfeng Zhu ◽  
Bijun Fang ◽  
Xiangyong Zhao ◽  
Shuai Zhang ◽  
Dun Wu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electrical Properties ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
High Tc ◽  
Oxalate Route

Ferroelectric phase transition and electrical properties of Ba(Bi0.5Ta0.5)O3

2013 ◽  
Vol 32 (2-3) ◽  
pp. 154-162
Author(s):  
B. C. Sutar ◽  
R. Padhee ◽  
Piyush R. Das ◽  
R. N. P. Choudhary
Keyword(s):  
Phase Transition ◽  
Electrical Properties ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase

Electrical Properties of Pb(Mg1/3Nb2/3)-PbTiO3 Ferroelectric Single Crystal

2009 ◽  
Vol 421-422 ◽  
pp. 419-422
Author(s):  
Ghulam Shabbir ◽  
Seiji Kojima
Keyword(s):  
Phase Transition ◽  
Electrical Properties ◽  
Single Crystal ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Charge Carriers ◽  
Frequency Range ◽  
Thermally Activated ◽  
Phase Transition Temperatures ◽  
Ferroelectric Single Crystal

The electrical properties of [001]-oriented morphotropic phase boundary (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-33%PT) single crystal have investigated as a function of temperature and frequency. The ac-conductivity exhibited continuous dispersion at all temperatures and frequency range examined and was associated to the thermally activated space charge carriers and local off-centering of Ti4+ and Pb2+ ions. The variations in ferroelectric phase transition temperatures observed in the poled state were associated to the polarization fluctuations and phase co-existence.

Normal-to-relaxor ferroelectric phase transition and electrical properties in Nb-modified 0.72BiFeO3-0.28BaTiO3 ceramics

2015 ◽  
Vol 36 (1-4) ◽  
pp. 1-7 ◽  
Author(s):  
Qiaolan Fan ◽  
Changrong Zhou ◽  
Weidong Zeng ◽  
Lei Cao ◽  
Changlai Yuan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electrical Properties ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Relaxor Ferroelectric

Ti-doping induced antiferroelectric to ferroelectric phase transition and electrical properties in Sm-PbZrO3 thin films

2021 ◽  
Vol 24 ◽  
pp. 12-18
Author(s):  
Santhosh Kumar Thatikonda ◽  
Wenhua Huang ◽  
Xingru Du ◽  
Chuangye Yao ◽  
Yifu Ke ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Electrical Properties ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Ti Doping

scholarly journals The origin of the lattice thermal conductivity enhancement at the ferroelectric phase transition in GeTe

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Đorđe Dangić ◽  
Olle Hellman ◽  
Stephen Fahy ◽  
Ivana Savić
Keyword(s):  
Phase Transition ◽  
Thermal Conductivity ◽  
Phase Transitions ◽  
Thermoelectric Materials ◽  
Ferroelectric Phase Transition ◽  
Lattice Thermal Conductivity ◽  
Ferroelectric Phase ◽  
Structural Phase ◽  
High Symmetry ◽  
Structural Phase Transitions

AbstractThe proximity to structural phase transitions in IV-VI thermoelectric materials is one of the main reasons for their large phonon anharmonicity and intrinsically low lattice thermal conductivity κ. However, the κ of GeTe increases at the ferroelectric phase transition near 700 K. Using first-principles calculations with the temperature dependent effective potential method, we show that this rise in κ is the consequence of negative thermal expansion in the rhombohedral phase and increase in the phonon lifetimes in the high-symmetry phase. Strong anharmonicity near the phase transition induces non-Lorentzian shapes of the phonon power spectra. To account for these effects, we implement a method of calculating κ based on the Green-Kubo approach and find that the Boltzmann transport equation underestimates κ near the phase transition. Our findings elucidate the influence of structural phase transitions on κ and provide guidance for design of better thermoelectric materials.

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