scholarly journals Exploring Electric Polarization Mechanisms in Multiferroic Oxides

2017 ◽  
Author(s):  
Trevor A. Tyson
Keyword(s):  
Electric Polarization ◽  
Multiferroic Oxides

Fluorine Doping Effects on the Electric Property of BiFeO3 Thin Films

2014 ◽  
Vol 624 ◽  
pp. 161-164
Author(s):  
Fang Long Xu ◽  
Peng Jun Zhao ◽  
Jia Qi Zhang ◽  
Xin Qian Xiong
Keyword(s):  
Thin Films ◽  
Direct Evidence ◽  
Sol Gel ◽  
Electric Polarization ◽  
Rhombohedral Structure ◽  
X Ray Diffraction ◽  
Glass Substrates ◽  
Doping Effects ◽  
Ito Glass ◽  
Multiferroic Oxides

F doping BiFeO3-xFx (x=0, 0.02, 0.04, 0.06, 0.08) thin films were successfully fabricated on ITO/glass substrates by sol-gel method. X-ray diffraction analysis indicated that the un-doped BiFeO3 and F doping BiFeO3 thin films presented rhombohedral structure with the space group R3c. F-doping is found to significantly enhance the dielectric constant and decrease the leakage current density for x=0.08 compared with x=0. This study provides direct evidence that the multiferroic characteristics of BiFeO3 are sensitive to the anion doping, such as F, providing a convenient alternative to manipulate the electric polarization in multiferroic oxides.

scholarly journals Characterization of Multiferroic Domain Structures in Multiferroic Oxides

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Lizhi Liang ◽  
Heng Wu ◽  
Lei Li ◽  
Xinhua Zhu
Keyword(s):  
Electric Polarization ◽  
Order Parameters ◽  
Domain Structures ◽  
Transmission Electron ◽  
Multiferroic Oxides ◽  
Recent Developments ◽  
And Performance ◽  
Applied Fields ◽  
Aberration Corrected

Multiferroic oxides have been received much attention due to that these materials exhibit multiple ferroic order parameters (e.g., electric polarization in ferroelectrics, magnetization in ferromagnetics, or spontaneous strain in ferroelastics) simultaneously in the same phase in a certain temperature range, which offer an exciting way of coupling between the ferroic order parameters. Thus, this provides a possibility for constructing new type of multifunctional devices. The multiferroic domain structures in these materials are considered to be an important factor to improve the efficiency and performance of future multiferroic devices. Therefore, the domain structures in multiferroic oxides are widely investigated. Recent developments in domain characterization techniques, particularly the aberration-corrected transmission electron microscopy (TEM), have enabled us to determine the domain structures at subangstrom scale, and the recent development ofin situTEM techniques allows ones to study the dynamic behaviors of multiferroic domains under applied fields or stress while the atomic structure is imaged directly. This paper provides a review of recent advances on the characterization of multiferroic domain structures in multiferroic oxides, which have been achieved by the notable advancement of aberration-corrected TEM.

Spontaneous electric polarization and electric field gradient in hybrid improper ferroelectrics: insights and correlations

2021 ◽  
Author(s):  
Samuel Silva dos Santos ◽  
Michel L. Marcondes ◽  
Ivan P. Miranda ◽  
Pedro Rocha-Rodrigues ◽  
Lucy Vitória Credidio Assali ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Field Gradient ◽  
Ab Initio ◽  
Field Gradient ◽  
Electric Polarization ◽  
Double Perovskites

An ab-initio study for several hybrid improper ferroelectric (HIF) materials in the Ruddlesden-Popper phases and double perovskites structures is here presented. The focus is on the correlation between the electric...

scholarly journals Stacking faults in α−RuCl3 revealed by local electric polarization

2021 ◽  
Vol 103 (17) ◽  
Author(s):  
Xinrun Mi ◽  
Xiao Wang ◽  
Hengrui Gui ◽  
Maocai Pi ◽  
Tingting Zheng ◽  
...  
Keyword(s):  
Stacking Faults ◽  
Electric Polarization

scholarly journals Giant magnetostriction and nonsaturating electric polarization up to 60 T in the polar magnet CaBaCo4O7

2021 ◽  
Vol 103 (17) ◽  
Author(s):  
Yi-Sheng Chai ◽  
Jun-Zhuang Cong ◽  
Jin-Cheng He ◽  
Dan Su ◽  
Xia-Xin Ding ◽  
...  
Keyword(s):  
Electric Polarization ◽  
Giant Magnetostriction

scholarly journals Conservation Integrals in Nonhomogeneous Materials with Flexoelectricity

2021 ◽  
Vol 11 (2) ◽  
pp. 681
Author(s):  
Pengfei Yu ◽  
Weifeng Leng ◽  
Yaohong Suo
Keyword(s):  
Electromechanical Coupling ◽  
Energy Momentum Tensor ◽  
Great Influence ◽  
Operator Method ◽  
Electric Polarization ◽  
Momentum Tensor ◽  
Noether Theorem ◽  
Strain Gradients ◽  
Flexoelectric Effect ◽  
Nonhomogeneous Materials

The flexoelectricity, which is a new electromechanical coupling phenomenon between strain gradients and electric polarization, has a great influence on the fracture analysis of flexoelectric solids due to the large gradients near the cracks. On the other hand, although the flexoelectricity has been extensively investigated in recent decades, the study on flexoelectricity in nonhomogeneous materials is still rare, especially the fracture problems. Therefore, in this manuscript, the conservation integrals for nonhomogeneous flexoelectric materials are obtained to solve the fracture problem. Application of operators such as grad, div, and curl to electric Gibbs free energy and internal energy, the energy-momentum tensor, angular momentum tensor, and dilatation flux can also be derived. We examine the correctness of the conservation integrals by comparing with the previous work and discuss the operator method here and Noether theorem in the previous work. Finally, considering the flexoelectric effect, a nonhomogeneous beam problem with crack is solved to show the application of the conservation integrals.

ROLE OF ELECTRIC POLARIZATION IN THE THERMOLUMINESCENCE OF CHLOROPLASTS

1984 ◽  
Vol 40 (1) ◽  
pp. 119-125 ◽  
Author(s):  
P. P. Knox ◽  
P. S. Venediktov ◽  
A. A. Kononenko ◽  
Gy. I. Garab ◽  
Á. Faludi-Dániel
Keyword(s):  
Electric Polarization
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