Dielectric properties of e-gun evaporated LiNbO3 thin films

Perentzis, G.; Horopanitis, E. E.; Papadimitriou, L.; Durman, Vladimir; Šály, V.; Milovska, S.

doi:10.1109/isse.2006.365360

2006 29th International Spring Seminar on Electronics Technology 2006

DOI: 10.1109/isse.2006.365360

|View full text |Cite

Dielectric properties of e-gun evaporated LiNbO3 thin films

G. Perentzis

E. E. Horopanitis

L. Papadimitriou

et al.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2007

2008

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As anode of the microbattery carbon-graphite films were used. The high melting point (1275 °C) of the LiNbO 3 is very convenient for forming interfaces between these two materials because during the evaporation of Carbon with the e-gun technique the substrate, with the previous deposited films on it, is thermally radiated [13]. Most of the electrolytes do not show such a high melting point.…”

mentioning

confidence: 99%

Influence of different substrates on the ionic conduction in LiCoO₂/LiNbO₃ thin‐film bi‐layers

Horopanitis

Perentzis

Papadimitriou

2008

Phys. Status Solidi (c)

View full text Add to dashboard Cite

LiNbO3 thin films, deposited by e‐gun evaporation, show lithium deficiency, which is cured by “Li doping”. The “Li doping” of the films was achieved by preparing a structure of Li‐Nb‐O/Li/Li‐Nb‐O, which after annealing forms a homogenized LiNbO3 layer because of diffusion of Li in the two Li‐Nb‐O layers. The LiCoO2/LiNbO3 bi‐layers were prepared either on Stainless Steel/TiN or on Al2O3/Co/Pt substrates/ohmic‐contacts by depositing first either the cathode LiCoO2 or the electrolyte LiNbO3. The Nyquist plots of the AC impedance measurements of all structures showed that the interfaces prepared on Stainless‐Steel/TiN consisted of two semicircles. The structures deposited on Al2O3/Co/Pt showed a third semicircle, which is probably due to the roughness of the substrate. It is important that the ionic properties of the bi‐layers with the cathode material deposited first, a usual structure in a microbattery, are improved compared to the other structures. The quality of the LiNbO3 layer depends very much on the substrate. It can be evaluated from Arrhenius plots that the activation energy of this layer is considerably lower when the whole structure is deposited on Stainless Steel/TiN. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

show abstract

mentioning

confidence: 99%

Influence of different substrates on the ionic conduction in LiCoO₂/LiNbO₃ thin‐film bi‐layers

Horopanitis

Perentzis

Papadimitriou

2008

Phys. Status Solidi (c)

View full text Add to dashboard Cite

show abstract

“…The first results on dielectric properties of e-gun evaporated LiNbO 3 thin films we discussed in [9] and also an equivalent circuit was proposed and presented there. In this paper we present an improved equivalent circuit and further more detailed results.…”

mentioning

confidence: 99%

Dielectric properties of Li doped Li‐Nb‐O thin films

Perentzis

Horopanitis

Papadimitriou

et al. 2007

Phys. Status Solidi (c)

View full text Add to dashboard Cite

Lithium niobate LiNbO3 was prepared as a thin film layered structure deposited on stainless steel substrate using e-gun evaporation. The Li doping was provided for by the formation of Li-Nb-O/Li/LiNb-O sandwich structure and annealing at about 250 °C. AC impedance spectroscopy measurements were performed on the samples at temperatures from the interval between 28 and 165 °C and in a frequency range of 10 -3 to 10 6 Hz. Using the values Z´ and Z´´ at different frequencies, the dielectric parameters -parts of the complex permittivity ε´ and ε´´ and loss tangent tan δ were calculated. The results prove validity of the proposed equivalent circuit containing parallel RC elements connected in series where the first RC element represents the bulk of material and the second RC element belongs to the double layer at the metal interface.1 Introduction Ferroelectric materials, such as crystalline lithium niobate, are very useful for fabricating a variety of optical and electronic devices, including optical switches and modulators, frequency switching devices, polarized controllers, pulsed waveguide lasers, surface-acoustic-wave filters and acousto-optic devices. Other useful properties of these materials include their piezoelectric, elasto-optic and pyroelectric characteristics. Lithium niobate-based devices are typically manufactured from bulk crystal material -usually a wafer about 0.5 to 1 mm thick -even though the devices use only a small fraction of the material's surface volume. The most important progress has been made in the 1960s when a high quality optical grade LN material started to be prepared [1]. The useful, well known, bulk single crystal properties can be also expanded to unique features of thin films. Furthermore, the thin film approach gives the possibility of using various substrates with alternate utilities [2]. As an alternative, scientists have attempted to produce thin films of crystalline lithium niobate. LN thin films are also known for their technological applications in electrochromic displays or in all solid state thin film microbatteries [3,4]. The methods used for preparation of LiNbO 3 thin films include MBE, laser ablation, sol-gel deposition, rf sputtering and, very recently, e-gun evaporation. Thin films formed by rf sputtering or e-gun evaporation show lithium deficiency [3,4]. The deposited films are cured by "Li doping" in order to solve this problem. The Li doping of deposited films leads to considerable increase of the conductivity and such values as 10 -4 Sm -1 can be reached. The behaviour of LN is affected by phase transitions. The samples of LN show such phase transitions. A transition usually appears at high temperatures (over 1000 °C) and one or more phases appear in doped samples at low temperatures (typically 60 to 130 °C) while the pure samples show no low temperature transition. It was pointed out that only very small amount of critical impurities may be enough for such phase transitions [1].

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Dielectric properties of e-gun evaporated LiNbO3 thin films

Cited by 2 publications

References 9 publications

Influence of different substrates on the ionic conduction in LiCoO₂/LiNbO₃ thin‐film bi‐layers

Influence of different substrates on the ionic conduction in LiCoO₂/LiNbO₃ thin‐film bi‐layers

Dielectric properties of Li doped Li‐Nb‐O thin films

Contact Info

Product

Resources

About

Dielectric properties of e-gun evaporated LiNbO3 thin films

Cited by 2 publications

References 9 publications

Influence of different substrates on the ionic conduction in LiCoO2/LiNbO3 thin‐film bi‐layers

Influence of different substrates on the ionic conduction in LiCoO2/LiNbO3 thin‐film bi‐layers

Dielectric properties of Li doped Li‐Nb‐O thin films

Contact Info

Product

Resources

About

Influence of different substrates on the ionic conduction in LiCoO₂/LiNbO₃ thin‐film bi‐layers

Influence of different substrates on the ionic conduction in LiCoO₂/LiNbO₃ thin‐film bi‐layers