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Obtention of memories with LaNiO3 and LaNiO3/BaTiO3 using PLD

Grant number: 14/01371-5
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): May 01, 2014
Effective date (End): April 30, 2019
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Elson Longo da Silva
Grantee:Leonélio Cichetto Junior
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
Associated research grant:13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID
Associated scholarship(s):17/23663-6 - Irradiation by femtosecond laser in thin films of LaNiO3 deposited by PLD for study of structural and physical properties for application in ferroelectric memories, BE.EP.PD


The compound LaNiO3 (LNO), lanthanum nickelate, is an interesting material due to its extensive and promising applications as bottom electrodes in various devices. LaNiO3 undergoes a rhomobohedral to cubic phase transition at high temperatures, and displays a metallic-like behavior and Pauli paramagnetism in a wide range of temperature as well. Recently a great interest in the fabrication of nanostructured polycristaline thin films as LNO arose, and this motivation has been leading to discovery of some properties not yet well understood, such as an increase in conductivity, which is ideal for applications as bottom electrode devices and the indication of superconductivity in heterostructures. On the other hand, barium titanate (BaTiO3) has interesting properties such as piezoelectricity and high value of dielectric constant , therefore it can be used as a dielectric in the fabrication of dielectric / ferroelectric memories.A detailed study of this system LaNiO3 and LaNiO3/ BaTiO3 thin films deposited by an accurate and reliable technique is of paramount importance and relevance to a better understanding of their physical and chemical properties, and such understanding is essential if we are intending to use this kind of material in future applications such as the construction of photoluminescent materials and FeRAM memories.This work aims to study the deposition of thin films of LaNiO3 and LaNiO3 / BaTiO3 system manufactured trough the technique known as Pulsed Laser Deposition (PLD), on different substrates (SrTiO3, MgO, LaAlO3 and SrLaAlO4).These films will be characterized with x-ray diffraction, scanning electron microscopy, atomic force microscopy and electrical resistivity measurements at low temperatures , since the data obtained by these techniques combined can provide a better understanding of the physical properties of this strongly correlated system. (AU)

Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
AMORESI, RAFAEL A. C.; CICHETTO JR, LEONELIO; KUNDU, SWARUP; TEODORO, MARCIO D.; MARQUES, GILMER E.; LONGO, ELSON; ANDRES, JUAN; CHIQUITO, ADENILSON J.; ZAGHETE, MARIA A. Direct preparation of standard functional interfaces in oxide heterostructures for 2DEG analysis through beam-induced platinum contacts. Applied Physics Letters, v. 113, n. 13 SEP 24 2018. Web of Science Citations: 0.
SERGEENKOV, S.; CICHETTO, JR., L.; DIAZ, J. C. C. A.; BASTOS, W. B.; LONGO, E.; ARAUJO-MOREIRA, F. M. Manifestation of unusual size effects in granular thin films prepared by pulsed laser deposition. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, v. 98, p. 38-42, NOV 2016. Web of Science Citations: 5.
SERGEENKOV, S.; CORDOVA, C.; CICHETTO, JR., L.; DE LIMA, O. F.; LONGO, E.; ARAUJO-MOREIRA, F. M. Anomalous temperature behavior of resistance in C1-xCox thin films grown by pulsed laser deposition technique. Journal of Alloys and Compounds, v. 667, p. 18-22, MAY 15 2016. Web of Science Citations: 2.
SERGEENKOV, S.; CICHETTO, JR., L.; ZAMPIERI, M.; LONGO, E.; ARAUJO-MOREIRA, F. M. Scaling like behaviour of resistivity observed in LaNiO3 thin films grown on SrTiO3 substrate by pulsed laser deposition. JOURNAL OF PHYSICS-CONDENSED MATTER, v. 27, n. 48 DEC 9 2015. Web of Science Citations: 5.
SERGEENKOV, S.; CICHETTO, JR., L.; LONGO, E.; ARAUJO-MOREIRA, F. M. Evidence for resonant scattering of electrons by spin fluctuations in LaNiO3/LaAlO3 heterostructures grown by pulsed laser deposition. JETP LETTERS, v. 102, n. 6, p. 383-386, SEP 2015. Web of Science Citations: 5.

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