Effect of LaNiO3 electrode on microstructural and ferroelectric properties of Bi3.25Eu0.75Ti3O12 thin films

Kim, Kyoung‐Tae; Kim, Chang-Il; Kim, Jong-Gyu; Kim, Gwan-Ha

doi:10.1016/j.tsf.2007.04.035

Cited by 23 publications

(13 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For this reason, LaNiO 3 is widely used as an electrode in oxide electronic devices, in particular in epitaxially strained perovskite thin films. [11][12][13][14][15] In addition, ultrathin films of LaNiO 3 were found to display thickness-dependent MITs.…”

Section: Introductionmentioning

confidence: 99%

First-principles study of oxygen-deficientLaNiO3structures

Malashevich

Ismail‐Beigi

2015

Phys. Rev. B

View full text Add to dashboard Cite

We describe the results of first-principles calculations of the properties of oxygen vacancies in LaNiO3. We consider isolated oxygen vacancies, pairs of vacancies, and vacancies at finite concentrations that form oxygen-deficient phases of LaNiO3. The key electronic structure question we address is whether and to what extent an oxygen vacancy acts as an electron donor to the Fermi level (mobile and conducting electronic states). More generally, we describe how one can quantify, based on electronic structure calculations, the extent to which a localized point defect in a metallic system donates electrons to the Fermi level compared to trapping electrons in localized defect states. For LaNiO3, we find that an oxygen vacancy does not create mobile carrier but instead makes the two Ni sites adjacent to it turn into Ni 2+ cations. Energetically, we compute the formation energy and diffusion barrier for oxygen vacancies. Structurally, we show that pair of vacancies prefer to form on opposite sides of a Ni cation, aligning along a pseudocubic axis. For finite concentrations of vacancies, we compute the dependence of the LaNiO3 lattice parameters on the vacancy concentration to provide reliable data for experimental determination of oxygen content in LaNiO3 and LaNiO3 thin films.

show abstract

Section: Introductionmentioning

confidence: 99%

First-principles study of oxygen-deficientLaNiO3structures

Malashevich

Ismail‐Beigi

2015

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…For a long time, the technological interest in this material has been limited to the development of highly conductive bottom electrodes for various ferroelectric thin-film devices [3][4][5]. But recently, the enthusiasm was renewed by experimental recognition of electric-field tunable metal-to-insulator transition and theoretical findings that heterostructures and superlattices composed of thin LaNiO 3 layers separated by wide-gap insulators could possibly exhibit high-temperature superconductivity [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Elastic properties of rhombohedral, cubic, and monoclinic phases of LaNiO 3 by first principles calculations

Masys

Jonauskas

2015

Computational Materials Science

View full text Add to dashboard Cite

By applying density functional theory (DFT) approximations, we present a firstprinciples investigation of elastic properties for the experimentally verified phases of a metallic perovskite LaNiO 3 . In order to improve the accuracy of calculations, at first we select the most appropriate DFT approaches according to their performance in reproducing the low-temperature crystalline structure and the electronic density of states observed for the bulk LaNiO 3 . Then, we continue with the single-crystal elastic constants and mechanical stability for the most common rhombohedral as well as high-temperature cubic and strain-induced monoclinic phases. Together with the calculated single-crystal elastic constants, the deduced polycrystalline properties, including bulk, shear, and Young's moduli, Poisson's ratio, Vickers hardness, sound velocities, Debye temperature, and anisotropy indexes, remedy the existing gap of knowledge about the elastic and mechanical behaviour of LaNiO 3 , at least from a theoretical standpoint.

show abstract

“…When li + doping content is 0.10, the remanent polarization (2Pr) value is 21.6 μc/cm 2 which is higher than those of bEuT without li + doping (16.5 μc/cm 2 ) prepared under the same experimental conditions. The remanent polarization values are lower than that of metalorganic-solutionderived bEuT (x = 0.75) thin films annealed at the same temperature [8], [20]. This is possibly caused by relatively low Eu content in the li + -doped bEuT thin films.…”

Section: Improved Photoluminescence and Ferroelectric Properties Of (mentioning

confidence: 77%

Improved photoluminescence and ferroelectric properties of (Bi_3.6Eu_0.4)Ti₃O₁₂thin films via Li⁺doping

Zhou

Gao

et al. 2010

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

View full text Add to dashboard Cite

(Bi(3.6)Eu(0.4))Ti₃O₁₂ (BEuT) thin films with different Li+ doping contents were prepared on fused silica and Pt/Ti/SiO₂/Si substrates by chemical solution deposition, and the effects of Li+ doping contents on the photoluminescence and ferroelectric properties of the thin films were investigated in detail. The results showed that an appropriate amount of Li+ doping could effectively improve emission intensities for two characteristic Eu³+ emission transitions of ⁵D₀→⁷F₁ (594 nm) and ⁵D₀→⁷F₂ (617 nm) compared with BEuT thin films without Li doping. This photoluminescence improvement can be attributed to the dual roles of Li+ ions, one of which is that Li ions can act as co-activators which are helpful to the energy transfer from the host to the Eu³+ ions, leading to a higher quantum yield; the other is that Li ion doping can induce local distortion of crystal field surrounding the Eu³+ activator because Bi³+ and Li+ ions have different ionic radii. In addition, the Li+-doped BEuT thin films had larger remanent polarization than BEuT thin films without Li doping prepared under the same experimental conditions. These results suggest that Li+ doping is an effective way to improve photoluminescence and ferroelectric properties of the (Bi,Eu)₄Ti₃O₁₂ thin films.

show abstract

Effect of LaNiO3 electrode on microstructural and ferroelectric properties of Bi3.25Eu0.75Ti3O12 thin films

Cited by 23 publications

References 23 publications

First-principles study of oxygen-deficientLaNiO3structures

First-principles study of oxygen-deficientLaNiO3structures

Elastic properties of rhombohedral, cubic, and monoclinic phases of LaNiO 3 by first principles calculations

Improved photoluminescence and ferroelectric properties of (Bi_3.6Eu_0.4)Ti₃O₁₂thin films via Li⁺doping

Contact Info

Product

Resources

About

Effect of LaNiO3 electrode on microstructural and ferroelectric properties of Bi3.25Eu0.75Ti3O12 thin films

Cited by 23 publications

References 23 publications

First-principles study of oxygen-deficientLaNiO3structures

First-principles study of oxygen-deficientLaNiO3structures

Elastic properties of rhombohedral, cubic, and monoclinic phases of LaNiO 3 by first principles calculations

Improved photoluminescence and ferroelectric properties of (Bi3.6Eu0.4)Ti3O12thin films via Li+doping

Contact Info

Product

Resources

About

Improved photoluminescence and ferroelectric properties of (Bi_3.6Eu_0.4)Ti₃O₁₂thin films via Li⁺doping