Coupling of Defect Fields to Domains and Phase Transition Characteristics of Ferroelectric Thin Films with Charged Defects

ABSTRACTWe analyze the effect of charged defects on the electrical domains, phase transition characteristics and electrical properties of ferroelectric thin films with thin dead layers using a non-linear thermodynamic model. Depending on their density and field strength, defects can pin and couple to electrical domains in the film. For ultrathin films, depolarizing effects dominate and the transition from the paraelectric state is into the multidomain ferroelectric state during cooling and is strongly smeared. The competition between defect induced extrinsic effects and the dead layer related limit is demonstrated.

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First Principles Study of Size Effect in BaTiO3 Ultrathin Films

MRS Proceedings ◽

10.1557/proc-881-cc5.10 ◽

2005 ◽

Vol 881 ◽

Author(s):

Bo-Kuai Lai ◽

Igor Kornev ◽

Laurent Bellaiche ◽

Greg Salamo

Keyword(s):

Thin Films ◽

Phase Transition ◽

Size Effect ◽

Ultrathin Films ◽

First Principles ◽

Size Effects ◽

Surface Film ◽

Misfit Strain ◽

Ferroelectric Thin Films ◽

Electrical Boundary Conditions

AbstractProperties and phase transition behaviors of ferroelectric thin films that are different from that of their bulk form is usually referred to as size effect. A first-principles-based scheme is used to investigate the effects of four important factors contributing to the size effects in epitaxial (001) BaTiO3 ultrathin films: misfit strain, existence of surface, film thickness, and electrical boundary conditions.

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Thickness Dependence of Phase Transition Temperature in Disordered Monodomain Ferroelectric Thin Films

Ferroelectrics ◽

10.1080/00150193.2014.889542 ◽

2014 ◽

Vol 461 (1) ◽

pp. 44-49

Author(s):

E. V. Kirichenko

Keyword(s):

Thin Films ◽

Phase Transition ◽

Transition Temperature ◽

Phase Transition Temperature ◽

Ferroelectric Thin Films ◽

Thickness Dependence

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A new type of first-order phase transition in ferroelectric thin films

Journal of Physics Condensed Matter ◽

10.1088/0953-8984/6/6/022 ◽

1994 ◽

Vol 6 (6) ◽

pp. 1207-1212 ◽

Cited By ~ 9

Author(s):

Bao-Dong Qu ◽

Wei-Lie Zhong ◽

Pei-Lin Zhang

Keyword(s):

Thin Films ◽

Phase Transition ◽

Order Phase Transition ◽

Ferroelectric Thin Films ◽

First Order ◽

First Order Phase Transition ◽

New Type ◽

First Order Phase

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Phase-transition behavior of the spontaneous polarization and susceptibility of ferroelectric thin films

Physical Review B ◽

10.1103/physrevb.52.766 ◽

1995 ◽

Vol 52 (2) ◽

pp. 766-770 ◽

Cited By ~ 30

Author(s):

Baodong Qu ◽

Weilie Zhong ◽

Peilin Zhang

Keyword(s):

Thin Films ◽

Phase Transition ◽

Spontaneous Polarization ◽

Ferroelectric Thin Films ◽

Phase Transition Behavior ◽

Transition Behavior

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Phase transition properties of ferroelectric thin films with diluted surfaces

Ferroelectrics ◽

10.1080/00150199908224312 ◽

1999 ◽

Vol 229 (1) ◽

pp. 21-26

Author(s):

C. L. Wang ◽

L. Zhang ◽

W. L. Zhong ◽

P. L. Zhang

Keyword(s):

Thin Films ◽

Phase Transition ◽

Ferroelectric Thin Films

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The effect of strain and dead layer on the nonlinear electric-mechanical behavior of ferroelectric thin films

Computational Materials Science ◽

10.1016/j.commatsci.2013.04.062 ◽

2013 ◽

Vol 77 ◽

pp. 377-383

Author(s):

Y.J. Zhang ◽

X.J. Zheng ◽

F. Jiao ◽

H.P. Hu

Keyword(s):

Thin Films ◽

Mechanical Behavior ◽

Ferroelectric Thin Films ◽

Dead Layer

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Thickness dependence of susceptibility and phase transition temperature in ferroelectric thin films

physica status solidi (b) ◽

10.1002/pssb.200642302 ◽

2007 ◽

Vol 244 (2) ◽

pp. 783-793 ◽

Cited By ~ 3

Author(s):

V. C. Lo ◽

K. T. Li

Keyword(s):

Thin Films ◽

Phase Transition ◽

Transition Temperature ◽

Phase Transition Temperature ◽

Ferroelectric Thin Films ◽

Thickness Dependence

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Phase Transition Behaviours of the Spontaneous Polarization in Ferroelectric Thin Films

Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering ◽

10.2991/meic-15.2015.14 ◽

2015 ◽

Author(s):

Rong Li

Keyword(s):

Thin Films ◽

Phase Transition ◽

Spontaneous Polarization ◽

Ferroelectric Thin Films

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RF Magnetron Sputtered Ba0.96Ca0.04Ti0.84Zr0.16O3 Thin Films for High Frequency Applications

MRS Proceedings ◽

10.1557/proc-833-g1.2 ◽

2004 ◽

Vol 833 ◽

Author(s):

Ali Mahmud ◽

T. S. Kalkur ◽

N. Cramer

Keyword(s):

Thin Film ◽

Thin Films ◽

Dielectric Constant ◽

Substrate Temperature ◽

High Frequency ◽

Satellite Communications ◽

Ferroelectric Thin Films ◽

Paraelectric State ◽

Deposited Films

ABSTRACTPerovskite ferroelectric thin films in the paraelectric state exhibit outstanding dielectric properties, even at high frequencies (>1 GHz). The tunable dielectric constant of ferroelectric thin films can be used to design frequency and phase agile components. High dielectric constant thin film ferroelectric materials in the paraelectric state have received enormous attention due to their feasibility in applications such as decoupling capacitors and tunable microwave capacitors; the latter application has been fueled by the recent explosion in wireless and satellite communications. This paper reportsBa0.96Ca 0.04Ti0.84Zr0.16O3 (BCTZ) thin films that were deposited on Pt electrodes using radio frequency magnetron sputtering at a low (450 °C) substrate temperature. Sputtered thin film BCTZ at low substrate temperature is compatible with conventional integrated circuit technology. The structural characterization of the deposited films was performed by x-ray diffraction. The electrical characterization of the films was achieved by capacitance-voltage, current-voltage, and S-parameter (via vector network analyzer) measurements. In addition, the effect of post annealing on the deposited films was investigated. A detailed understanding of both their processing and material properties is discussed for successful implementation in high frequency applications.

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