Project name: Lead-free thin film of (Ba1_xCax)(Ti1-yZry)O3 system with large piezoelectric properties for microelectronics

Contract no. 14/2013

Project code: PN-II-RU-TE-2012-3-0467

PN II Program Name: Human Resources

Subprogram: Research projects for the stimulation of the forming of young independent research teams

Contracting authority: Executive Agency for Higher Education, Research, Development and Innovation Funding

Project director: Scarisoreanu Nicu Doinel

Team:
 Andrei Andreea Carmen
Birjega Ruxandra
Colceag Dan
Ion Valetin
Stokker Flavian
Nedelcu Liviu

Coordinator: National Institute for Lasers, Plasma, and Radiation Physics

Project summary:
 The project proposes the use of laser based techniques for obtaining piezoelectric strain gauge and capacitor structures based on a new lead-free material. Thin film of solid solution of barium zirconate titanate (BaZrxTi1-xO3- BZT) with barium calcium titanate (Ba1-yCa1-yTiO3- BCT) system, or BZT-xBCT were x is molar percent of BCT, will be deposited on different substrates by Radiofrequency Assisted Pulsed Laser Deposition. The layers will be characterized by Atomic Force Microscopy, Secondary Ions Mass Spectroscopy, Spectroellipsometry, Scanning Electron Microscopy, Piezoresponse force microscopy, X-ray diffraction, ferroelectric hysteresis measurements, High Resolution Transmission Electron Microscopy. Using MAPLE (Matrix assisted pulsed laser evaporations), powders of BZT-xBCT material on different flexible support for strain gauge applications. A second approach is proposed for obtaining lead-free BZT-xBCT based pixels with dimensions in the range of tens to hundreds on microns, for capacitor structures: printing by Laser Induced Forward Transfer (LIFT). The advantages are many; the active layer can be transferred on different receiving platforms.

Project objectives:

The main purpose of the project proposal is to study for the first time the dielectric, piezoelectric and ferroelectric properties of laser-processed thin film of BZT-xBCT system as a function of x, for piezoelectric strain gauge and capacitor applications.

Concrete objectives:

RESULTS HIGHLIGHTS

1. N.D. Scarisoreanu, F. Craciu, A. Moldovan, V. Ion, R. Birjega, C. Ghica, R.F. Negrea, M. Dinescu, "High Permittivity (1 − x)Ba(Zr0.2Ti0.8)O3 − x(Ba0.7Ca0.3)TiO3 (x = 0.45) Epitaxial Thin Films with Nanoscale Phase Fluctuations", ACS Applied Materials & Interfaces 7, 23984 (2015) - ISI Impact factor: 7.145 - click to download

2. F. Cordero, F. Craciun, M. Dinescu, N. Scarisoreanu, C. Galassi, W. Schranz, V. Soprunuyk, "Elastic response of (1 − x)Ba(Ti0.8Zr0.2)O3 – x(Ba0.7Ca0.3)TiO3 (x = 0.45–0.55) and the role of the intermediate orthorhombic phase in enhancing the piezoelectric coupling", Applied Physics Letters 105, 232904 (2014) - ISI Impact factor: 3.142 - article link

 

Stage I - 31.12.2013 (click for the scientific report)

Value : 298.50 lei

Conference presentations:

1.     INDLAS 2013 – May 2013, oral presentation: “Pulsed laser deposition growth of lead-free (Ba1−xCax)(ZryTi1−y)O3 thin films and their structural, optical and electrical properties”

2.     COLA 2013 – poster presentation: “The structural, optical and electrical properties for triple-point composition (Ba1−xCax)(ZryTi1−y)O3 thin films obtained by Pulsed Laser Deposition”

E-MRS 2013 Spring Meeting – poster: “Pulsed laser deposition growth of lead-free (Ba1−xCax)(ZryTi1−y)O3 thin films and their structural, optical and electrical properties”


Stage II - 31.12.2014 (click for the scientific report)

Value: 175.490 lei

Conference presentations:
Optical and electrical properties of (Ba1−xCax)(ZryTi1−y)O3 polycrystalline thin films growth by pulsed laser deposition; Valentin Ion, Nicu Doinel Scarisoreanu, Andreea Andrei, Ruxandra Birjega, Maria Dinescu, Adrian Bercea, Floriana Craciun; 10th International Conference on Physics of Advanced Materials; 22 - 28 September 2014; Iași, Romania – poster presentation
Electrical and optical properties of (Ba1-xCax)(ZryTi1-y)O3 lead-free thin films grown by PLD, A. I. Bercea, V. Ion, N. D. Scarisoreanu, A. Andrei, R. Birjega, M. Dinescu; 4th International Colloquium “Physics of Materials” November 13-14, 2014 Bucharest, Romania – poster presentation
Depunerea cu tehnici laser şi analiza filmelor subţiri de Ba1−xCax)(ZryTi1−y)O3; Bercea A, Scarisoreanu N.D., Craciun F., Andrei A., Ion V., Birjega R. and Dinescu M. Yearly session of scientific communications hoster by the Faculty of Physics, University of Bucharest, June, 2014 – oral presentation
“Synthesis of lead –free (Ba1−xCax)(ZryTi1−y)O3 thin films by laser ablation and their functional properties.” E-MRS 2014, Lille, France – oral presentation,
“Functional properties of nanostructured lead-free (Ba1−xCax)(ZryTi1−y)O3 thin films produced by laser ablation.” N. D. Scarisoreanu, F. Craciun, A. Andrei, V. Ion , R. Birjega, L.Nedelcu, M. Dinescu, NANOSEA 2014, Marseille, France – poster

Papers:
"Elastic response of (1-x)Ba(Ti0.8Zr0.2)O3-x(Ba0.7Ca0.3)TiO3 (x = 0.45-0.55) and the role of the intermediate orthorhombic phase in enhancing the piezoelectric coupling", F. Cordero, F. Craciun, M. Dinescu, N. Scarisoreanu, C. Galassi, W. Schranz, V. Soprunyuk, APPLIED PHYSICS LETTERS


Stage III - 31.12.2015 (click for the scientific report)

Value: 200.650 lei

 

Stage IV - 30.09.2016 (click for the scientific report)

Value: 25.210 lei

 

DISSEMINATION