Riad Nechache

Visiting Post Doctoral Fellow

Joint Laboratory on Advanced Materials for applications in Energy, Environment and Health NAST Centre, Università degli Studi di Roma Tor Vergata, Via Della Ricerca Scientifica, 1
I-00133 Roma, Italy
riad.nechache@uniroma2.it

Université du Québec
Institut national de la recherche scientifique
Énergie, Matériaux et Télécommunications
1650, boulevard Lionel-Boulet
Varennes, Québec, Canada
J3X 1S2

Telephone: +1 (514) 228-6946
Fax: +1 (450) 929-8102
nechache@emt.inrs.ca
www.emt.inrs.ca

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My research interests include nanoscale materials, devices and their applications in future spintronics and energy science. My work focuses on rational design and synthesis of highly complex inorganic nanostructures with precisely controlled chemical composition, physical morphology and dimension; investigation of the novel electronic, optical and magnetic properties and exploration of new technological opportunities arising in these new nanoscale structures. An emphasis is placed on the hetero-integration of multi-composition, multi-structure and multi-function at nanoscale, in particular multiferroic materials, to create a new generation of integrated nanosystems with unique functions to break the boundaries of traditional technologies.

Research areas
- Nanoengineering of functional oxides
- Multiferroic thin films and heterostructures for solar energy conversion
- Photoconductivity and Photovoltaic Effect in novel Ferroelectric/ferromagnetic perovskite thin films.
- Inorganic/Organic hybrid structure for spintronic application(spin valve)
- Hybrid Organic/inorganic structure for spintronic application
- Si nanowires & pn junction by MBE
- Multiferroic ultrathin films for spintronics
- Embedded semiconducting nanostructures for optoelectronics and photovoltaic application
- New Oxide Materials for Fuel Cell application.

Publications
1. R. Nechache, C. Harnagea, A. Pignolet, F. Normandin, T. Veres, L.-P. Carignan, D. Ménard, Growth, structure, and properties of epitaxial thin films of first-principles predicted multiferroic Bi2FeCrO6. Appl. Phys. Lett. 89, 102902 (2006).

2. R. Nechache, C. Harnagea, A. Pignolet, L.-P. Carignan and D. Ménard, « Growth, Structure and Multiferroic Properties of Epitaxial Bi2FeCrO6 Thin Films », Cansmart Workshop proceeding 2006 (8 pages).

3. Harnagea C, Cojocaru CV , Gautreau O, Nechache R, Normandin F, Veres T, Pignolet A, « Piezoresponse force microscopy of PLD-grown multiferroic BiFeO3 films and mesostructures », Integrated Ferroelectrics, 83: 1 ( 2006).

4. R. Nechache, C. Harnagea, A. Pignolet, L.-P. Carignan, D. Ménard, Epitaxial Bi2FeCrO6 Multiferroic Thin Films, Phil. Mag. Lett. 87, 231 (2007).

5. R. Nechache, L. Gunawan, L-P Carignan, C. Harnagea, G. Botton, D. Ménard, and A. Pignolet, J. Mater. Res. 22, 2102-2110 (2007).

6. R. Nechache, C.-V. Cojocaru, C. Harnagea, L.-P. Carignan, L. Gunawan, G. Botton, D. Ménard and A. Pignolet, « Structure and Properties of Epitaxial Thin Films Bi2FeCrO6 and patterned islands of BiFeO3 », Cansmart Workshop proceeding 2007 (10 pages).

7. R. Nechache, C.Harnagea, L.-P.Carignan, D. Ménard, , L. Gunawan, , G.A. Botton and A. Pignolet, “Growth, structure and properties of BiFeO3-BiCrO3 films obtained by dual cross beam PLD“, IEEE International Symposium on Applications of Ferroelectrics , art. no. 4393269, pp. 372-375(2007).

8. R. Nechache, P. Gupta, C. Harnagea, and Alain Pignolet, “Structural and multiferroic properties of BiFeO3/BiCrO3 epitaxial heterostructures”,

9. L. Gunawan, R. Nechache, C. Harnagea, A. Pignolet and G.A. Botton, “Electron Energy Loss Spectroscopy of Bi2FeCrO6 Thin Films on SrRuO3/SrTiO3”, Microscopy and Microanalysis, Volume 13, Supplement S02, Aug 2007, pp 1280-1281 (2007).

10. R. Nechache, C. Harnagea, L.-P. Carignan, D. Ménard, L. Gunawan, G. Botton, and A. Pignolet, “Growth, Structure and Properties of BiFeO3-BiCrO3 Films obtained by dual cross beam PLD”, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency 54, 2645 (2007).

11. D. Nuzhnyy, S. Kamba, R. Nechache, D. Niznansky, K. Zaveta, C. Harnagea, and A. Pignolet,“Far-infrared and Mossbauer spectroscopy of multiferroic Bi2FeCrO6 thin film over a broad temperature range”, Phys. Rev. B 77, 104111 (2008).

12. C. Harnagea, C. V. Cojocaru, R. Nechache, O. Gautreau, F. Rosei and A. Pignolet, Towards ferroelectric and multiferroic nanostructures and their characterization, Int. J. Nanotechnol. 5(9-12), 930-962 (2008).

13. O. Gautreau, R. Nechache, C. Harnagea et A. Pignolet. « Epitaxial multiferroic thin films and heterostructures ». Proceedings of 11th Cansmart Workshop 2008 (Montreal, QC, 23-24 Oct.): 10 pages (September 2008).

14. R. Nechache, C. Harnagea, L.-P. Carignan, D. Ménard, and A. Pignolet “Structure and Properties of Epitaxial Thin Films of Bi2FeCrO6: A Multiferroic Material Postulated by ab-initio Computations”, Integrated Ferroelectrics, 101(1), 152 (2008).

15. O. Gautreau, C. Harnagea, L. Gunawan, R. Nechache, M. P. Singh, P. Fournier, G. A. Botton, and A. Pignolet, “Piezoresponse Force Microscopy and Magnetic Force Microscopy Characterization of ?-Fe2O3 - BiFeO3 Nanocomposite / Bi3.25La0.75Ti3O12 Multiferroic Bilayers”, J. of Magnetism and Magnetic Materials, 321, p.1799 (2009).

16. R. Nechache, C. Harnagea, L.-P. Carignan, O. Gautreau, L. Pintilie, M. P. Singh, D. Ménard, P. Fournier, M. Alexe, and A. Pignolet, “Epitaxial thin films of the multiferroic double perovskite Bi2FeCrO6 grown on (100)-oriented SrTiO3 substrates: Growth, characterization, and optimization”, J. Appl. Phys, 105, 061621(2009).

17. C.-V. Cojocaru, R. Nechache, C. Harnagea, A. Pignolet and F. Rosei, “Nanoscale patterning of Functional Perovskite-type Complex Oxides by Pulsed Laser Deposition through a Nanostencil”, Applied Surface Science, 256, p.4777 (2010).

18. R. Nechache, C. Harnagea, A. Ruediger, F. Rosei and A. Pignolet, “Effect of Epitaxial Strain on The Structural and Ferroelectric Properties of Bi2FeCrO6 Thin Films”, Functional Material letters, 3, p.83 (2010).

19. S. Lazar, Y. Shao, L. Gunawan, R. Nechache, A. Pignolet, G.A. Botton, “Imaging, Core- Loss, and Low-Loss Electron-Energy-Loss Spectroscopy Mapping in Aberration-Corrected STEM”, Microscopy and Microanalysis, 16, p.416-424 (2010).

20. R. Nechache, C.V. Cojocaru, C. Harnagea, C. Nauenheim, M. Nicklaus, A. Ruediger, F. Rosei and A. Pignolet, “Epitaxial patterning of Bi2FeCrO6 double perovskite nanostructures multiferroic at room temperature”, accepted for publication in Adv Mater, adma.201004405 (Jan. 2011).