Size effects in polarization switching in ferroelectric thin films

Tagantsev, A. K.

doi:10.1080/10584589708013046

Cited by 39 publications

(36 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recent studies of the dependence of the size effect in LB March, 2000 Two-dimensional ferroelectricsferroelectric copolymer films on thickness confirm the size effect in the thickness range of 18 to 60 nm [74]. This behavior is consistent with the dominance of the nucleation mechanism; as the films become thinner, the nucleation volume is reduced and becomes energetically less favorable [91,92] until it is completely inhibited. The present results lead to the following conclusions.…”

Section: Two-dimensional Ferroelectric Filmssupporting

confidence: 61%

Two-dimensional ferroelectrics

Blinov¹,

Fridkin²,

Palto³

et al. 2000

Phys.-Usp.

138

100

View full text Add to dashboard Cite

Blinov, L. M.; Fridkin, V. M.; Palto, S.P.; Bune, A. V.; Dowben, Peter A.; and Ducharme, Stephen, "Two-Dimensional Ferroelectrics" (2000). Abstract. The investigation of the finite-size effect in ferroelectric crystals and films has been limited by the experimental conditions. The smallest demonstrated ferroelectric crystals had a diameter of $ 200 A and the thinnest ferroelectric films were $ 200 A thick, macroscopic sizes on an atomic scale. Langmuir ± Blodgett deposition of films one monolayer at a time has produced high quality ferroelectric films as thin as 10 A, made from polyvinylidene fluoride and its copolymers. These ultrathin films permitted the ultimate investigation of finite-size effects on the atomic thickness scale. Langmuir ± Blodgett films also revealed the fundamental two-dimensional character of ferroelectricity in these materials by demonstrating that there is no so-called critical thickness; films as thin as two monolayers (1 nm) are ferroelectric, with a transition temperature near that of the bulk material. The films exhibit all the main properties of ferroelectricity with a first-order ferroelectric ± paraelectric phase transition: polarization hysteresis (switching); the jump in spontaneous polarization at the phase transition temperature; thermal hysteresis in the polarization; the increase in the transition temperature with applied field; double hysteresis above the phase transition temperature; and the existence of the ferroelectric critical point. The films also exhibit a new phase transition associated with the twodimensional layers.

show abstract

Section: Two-dimensional Ferroelectric Filmssupporting

confidence: 61%

Two-dimensional ferroelectrics

Blinov¹,

Fridkin²,

Palto³

et al. 2000

Phys.-Usp.

138

100

View full text Add to dashboard Cite

show abstract

“…More recent studies of the finite-size effect reported by extended the thickness range down to 18 nm and determined that the coercive field scaled at the 20.7 power of the thickness [23]. This behavior is consistent with the nucleation mechanism and finite-size scaling; as the films are made thinner, nucleation volume is reduced and becomes energetically less favorable [7,24].…”

Section: (Received 29 June 1999)supporting

confidence: 57%

“…A more effective way to increase the coercive field is to make a particle small enough or a film thin enough to inhibit nucleation [3][4][5][6]. Several mechanisms for this finite-size effect have been proposed, including reduction of nucleation volume, space charge near the electrodes, and surface pinning [2,6,7]. Even in the thinnest ferroelectric films obtained previously, the measured extrinsic coercive field is much smaller than the intrinsic value calculated from the LG theory [1], and consequently there has been relatively little published discussion of the intrinsic coercive field.…”

Section: (Received 29 June 1999)mentioning

confidence: 99%

Intrinsic Ferroelectric Coercive Field

et al. 2000

View full text Add to dashboard Cite

show abstract

“…The size effect of different ferroelectric properties has been attributed to the presence of these layers. 29 It has also been suggested that depolarizing fields exist in these layers. The sense of depolarizing manifests in the opposite direction with respect to the field inside the film.…”

Section: Effect Of Space Chargementioning

confidence: 99%

Modeling the role of oxygen vacancy on ferroelectric properties in thin films

2002

Journal of Applied Physics

View full text Add to dashboard Cite

The presence of oxygen vacancies is considered to be the cause of various phenomena in ferroelectric thin films. In this work, the role of oxygen vacancies is theoretically modeled. Various properties are numerically simulated using the two-dimensional Ising model. In the presence of an oxygen vacancy in a perovskite cell, the octahedral cage formed by oxygen ions is distorted so that the potential energy profile for the displacement of the titanium ion becomes asymmetric. It requires additional energy to move from the lower minimum position to the higher one. Moreover, space charges are also developed by trapping charge carriers into these vacancies. The combination of the pinning effect induced by the distorted octahedral cage and the screening of the electric field in the presence of space charges results in phenomena such as fatigue and imprint.

show abstract

Size effects in polarization switching in ferroelectric thin films

Cited by 39 publications

References 16 publications

Two-dimensional ferroelectrics

Two-dimensional ferroelectrics

Intrinsic Ferroelectric Coercive Field

Modeling the role of oxygen vacancy on ferroelectric properties in thin films

Contact Info

Product

Resources

About