PLAD: Applications

PLAD of thin films and multilayers of innovative materials

Here following is a (partial) list of materials we have deposited by PLAD in the last years:

Material	Stoichiometry	Substrate	Function
YBCO	YBa₂Cu₃O_7-x	MgO, SrTiO₃	superconductor
G. Masciarelli, F. Fuso, A. Iembo, M. Allegrini and E. Arimondo, "In-situ spectroscopic analysis for pulsed laser deposition of superconductive Y-Ba-Cu-O thin films", pag. 819 in High T_c Superconductor Thin Films, L. Correra Editor, Elsevier, Amsterdam, 1992. G. Alzetta, E. Arimondo, R. M. Celli, and F. Fuso, "Simple method for resistance measurements on thin films, and bulk of high T_c superconducting materials", J. Phys. III France 4 1495 (1994).
PZT	PbZr_xTi_1-xO₃	Si, Si/Ti/Pt	ferroelectric
A. Iembo, F. Fuso, M. Allegrini, E. Arimondo, V. Berardi, N. Spinelli, F. Leccabue, B. E. Watts, G. Franco, and G. Chiorboli, "In-situ diagnostics of pulsed laser deposition of ferroelectric Pb(Ti_0.48 Zr_0.52)O₃ on Si", Appl. Phys. Lett. 63 1194 (1993). V.A. Yakovlev, G. Mattei, A. Iembo, F. Fuso, E. Arimondo, M. Allegrini, F. Leccabue, and B.E. Watts, "Raman, and Infrared Spectroscopy of Ferroelectric Pb(Zr_0.48 Ti_0.52)O₃ Films Deposited by Pulsed Laser Ablation", J. Appl. Phys. 78 6321 (1995). M. Labardi, M. Allegrini, F. Fuso, F. Leccabue, B. E. Watts, C. Ascoli, and C. Frediani, "Scanning, and Friction Force Microscopy (SFFM) of ferroelectric Pb(Zr,Ti)O₃ thin films", Integr. Ferroelectr. 8 143 (1995).
Fullerene	C₆₀+La₂O₃	KBr, HOPG	endohedral doped C₆₀
M. Allegrini, E. Arimondo, C. Callegari, F. Fuso, A. Iembo, G. Masciarelli, V. Berardi, N. Spinelli, S. Rossini and R. Danieli, "Laser Ablation and Deposition of Graphite, Lanthanum and Lanthanum-Doped Fullerene", pag. 31 in Fullerene Status and Perspectives, C. Taliani, G. Ruani and R. Zamboni Editors, World Scientific, Singapore, 1992.
RuO₂		Si, SiO₂	conductive oxide
A. Iembo, F. Fuso, E. Arimondo, C. Ciofi, G. Pennelli, G.M. Currò, F. Neri, and M. Allegrini, "Pulsed Laser Deposition, and Characterization of Conductive RuO2 Thin Films", J. Mater. Res. 12 1433 (1997). G. Mondio, F. Neri, M. Allegrini, A. Iembo, and F. Fuso, "Energy Loss Spectroscopy of RuO₂ Thin Films", J. Appl. Phys. 82 1730 (1997).
NiTi	approx 1:1	Al₂O₃, Si, Si/SiO_{2, Si₃N₄}, KBr	shape memory films
F. Ciabattari, F. Fuso, and E. Arimondo, "Pulsed Laser Deposition of NiTi Shape Memory Effect Thin Films", Appl. Phys. A 64 623 (1997). A. Camposeo, F. Fuso, E. Arimondo, and A. Tuissi, " Pulsed laser deposition and in--situ diagnostics of the process applied to shape memory alloys ", Appl. Phys. A, in press (2002).
Hg-cuprates	HgBa₂Ca_n-1Cu_nO_2n+2+x (n=2,3)	MgO, LaAlO₃ TiSrO₃	superconductors (T_c over 120 K)
M. Bindi, F. Fuso, N. Puccini, E. Arimondo, A. Tampieri, and G. Celotti, "Synthesis and charaterization of Hg-based superconducting thin films produced staring from laser deposited precursors", Int. J. Mod. Phys. B 14 2731 (2000). M. Bindi, F. Fuso, E. Arimondo, A. Tampieri, and G. Celotti, and D. Rinaldi, " Fabrication and characterization of Hg-based superconductive thin films ", Physica C, in press (2002).
YBCO/PZT		MgO, TiSrO₃	non-volatile memories
L.Ceresara, A.Iembo, F.Fuso, et al., Supercond. Sci. Technol., 9 276 (1996).
RuO₂/PZT		Si, SiO₂	non-volatile memories
A. Iembo, F. Fuso, M. Allegrini, E. Arimondo, A. Debenedittis, A. Di Cristoforo, P. Mengucci, B.E. Watts, and F. Leccabue, "Preparation of Pb(TiZr)O₃/RuO₂multilayers in situ by pulsed laser ablation deposition", Integr. Ferroelectr 18 397 (1997).
YSZ/YBCO		Inco alloy, Ni, Ni alloys	superconductive tapes
L. Ceresara, F. Fuso, E. Arimondo, and P. Scardi, "Pulsed laser deposition of YBCO thin films on metal substrates with YSZ buffer layer", Nuovo Cimento D 19 1033 (1997). M. Cantoro, N. Coppedè, A. Camposeo, M. Labardi, L. Pardi, F. Fuso, M. Allegrini, E. Arimondo, A. Baldini, A. Botarelli, M. Lancia, and G. Masciarelli," Laser deposition of YBCO films onto Ni-based substrates", Int. J. Mod. Phys. B, submitted (2002).

Presently, our major efforts are oriented towards:

in-situ fabrication by PLAD of shape-memory alloy (SMA)

films for applications in the field of micro-electromechanical systems (MEMS) [work supported by CNR through Progetto Finalizzato MSTA II - "Leghe a Memoria di Forma"];

in-situ fabrication by PLAD of superconductive multilayers on flexible metal substrates

for applications in the field of power-transmission [work supported by CNR through Progetto di Ricerca Applicata (5%) - "Applicazioni della Superconduttività ad alta T"];

in-situ fabrication by PLAD of superconductive Hg-based films on crystal substrates [work in collaboration with Dr. Anna Tampieri, IRTEC/CNR Faenza].

Characterization of our thin films and multilayers is mostly based on collaborations we have with other groups operating in the field of materials science. Anyway, in our lab we can perform preliminary optical (space-resolved reflection and transmission meaurements) and electrical (four probe resistance vs temperature) analysis on our samples. In addition, we fully exploit the capabilities of the Probe Microscopy Laboratory of Prof. Maria Allegrini to investigate the morphology and the optical properties of our samples with a space resolution below the diffraction limit.