Ovidiu Crisan

National Institute for Materials Physics, Bucharest, .

E-mail: trimite un mesaj.

Nascut(a) in: 1968

Interese: nanoparticule magnetice auto-organizate, re-orientare de spin si anizotropia de suprafata a nanoparticulelor prin simulari Monte Carlo, aliaje nanocristaline magnetice, magneti cuplati prin schimb de tip exchange spring,

Detalii:
Decembrie 2006: Distins cu Premiul Academiei Romane, Sectia de Stiinte Fizice, Premiul "Horia Hulubei" pe anul 2004, pentru grupul de lucrari: "Noi nanomateriale magnetice: de la procesare orientata la proprietati relevante si modelarea lor"

Details:
Scientific degree: Ph D in Physics, Materials Science, between November 1996 – July 1998: “Etude structurale et magnetique d’alliages amorphes et nanocristallisees - influence d’elements terre rare”, University of Rouen, France, obtained on 13th July 1998

Fields of professional activity – Research interests:
a) Synthesis of core-shell Ag/Co colloidal magnetic nanoparticles and their self-organization into 2D arrays and 3D superlattices: investigation of the structure, morphology and magnetic properties
b) Novel magnetic nanostructures for nanosensors fabrication using self-assembled arrays of core-shell nanoparticles – promoter of a NATO cooperative linkage grant between NIMP-Bucharest, AUTh, Greece, and Universite du Maine, Le Mans, France
c) Influence of the substrate nature, roughness and pre-patterning on the morphology and structure of the Au/Co, Pt/Co and Ag/Co thin films and multilayers, studied by AFM, TEM and SEM
d) Ion-beam patterning and formation of periodic arrays of dots / islands and/or elongated nanowires of Ag, Au and magnetoresistive Au-Co, Ag-Co, onto InP stepped functionalized surface by sputtering in UHV system; surface analysis with scanning probe techniques
e) Exchange coupling effects in FePt / Fe thin films by magnetic force microscopy (MFM) and conventional magnetometry (VSM)
f) Interface exchange coupling at the hard-soft FePt / Fe thin films interface through non-magnetic spacer layer studied by nuclear resonant forward scattering
g) Synthesis and characterization of Fe-Pt based melt spun ribbons as exchange spring nanocomposite magnets.
h) Thermal and pressure assisted phase transformations in intermetallic alloys and Fe3O4 by means of energy dispersive in-situ X-ray diffraction of synchrotron radiation –
i) Synthesis and characterization of exchange bias Fe / Fe3O4 nanocomposites obtained by mechanical alloying
j) Surface anisotropy effects on magnetic properties in nanoparticles and materials with antiphase boundaries studied by Monte Carlo simulations
k) Theoretical studies of magnetic properties of nanoparticles and nanocrystalline materials by Monte Carlo simulation using parallel computational facilities
l) Giant magnetoresistance effects in Cu-Co-(Fe,Si) and Cu-(SmCo5)-(Fe,Si) granular alloys: synthesis, characterization and investigation of the structural and electron transport properties as a function of exchange coupling between soft and hard magnetic phases
m) Investigation of the structural and soft magnetic properties of the (Fe,Gd)-Cu-Nb-Si-B thin films and ribbons (Finemet-type) and also of the nanocrystalline phases induced by annealing treatments
n) Spin structure, crystallization processes and characterization of metastable and nanocrystalline phases during annealing of Fe-RE-B (RE – rare earth) exchange spring nanocomposites
o) Noncollinear spin structures studied via Mossbauer and magnetic measurements of the FeRh anti-invar alloy with exchange bias properties
p) Structural investigation by X-ray diffraction and Mössbauer spectroscopy of ferrofluids and other fine magnetic particles

Postdoctoral research stages:
1. Dept. of Physics, Tel Aviv University, Tel Aviv, Israel
2. Laboratoire de Physique de l’Etat Condensé – Université du Maine, Le Mans, France:
3. RTN fellow at the Department of Physics, Aristotle University of Thessaloniki
4. Marie Curie fellow (host development EU project) at the Institute of Crystallography, Bari, Italy
5. Marie Curie fellow (host development EU project) at the Institute of Physics, Rostock University, Rostock, Germany
6. Marie Curie fellow (transfer of knowledge EU project) at the Institute of Physics, Jagiellonian University, Krakow, Poland
7. Research associate at the Dept of Chemistry, University of Leicester, UK (presently)

Prizes and awards:

- “Excellency in the scientific research” awarded by the Romanian Ministry of Research and Technology, sept. 2000, for the paper: "Magnetic Properties of the Magnetoresistive Cu-(SmCo5)-Fe Heterogranular Alloys", authors: O. Crisan, J.M. Le Breton, A. Jianu, A. Maignan, M. Noguès, J. Teillet and G. Filoti

- Romanian Academy Award "Horia Hulubei" for Physical Sciences (2004) for the group of papers: "Novel magnetic nanomaterials: from oriented synthesis to relevant properties and their modelling"

International Cooperation Programs promoted:
a) Scientific cooperation agreement between NIMP and Universite du Maine, Le Mans, in the frame of CNRS-France and Romanian Academy bilateral exchange program (director of the project): “Advanced Materials with Strong Surface Effects” 2004-2006
b) NATO Cooperative Linkage Grant (project promoter) “Novel Magnetic Nanostructures for Sensor Fabrication” no. CLG 980691 2004-2006

International expertise:
1. Scientific Referee of the Institute of Physics (IOP) Publishing, UK, for several journals, including: Nanotechnology, Journal of Physics: Condensed Matter, Journal of Physics D: Applied Physics, Measurement Science and Technology, etc.
2. Scientific Referee for Thin Solid Films and Journal of Optoelectronics and Advanced Materials
3. Lecturer in the frame of International Postgraduate Programme IPP – Rostock University, 2004 – 2005

Publicații selectate:

* Seqqat M, Nogues M, Ovidiu Crisan, Kuncser V, Cristea L, Jianu A, Filoti G, Dormann JL, Sayah D, Godinho M, Magnetic properties of Fe100-xSmx thin films and Fe80-xSmxB20 thin films and ribbons, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 158, 1996.

* Ovidiu Crisan, Le Breton JM, Jianu A, Teillet J, Filoti G, Structural properties of amorphous and nanocrystallized Fe-Cu-Nb-Si-B and Fe-Gd-Cu-Nb-Si-B ribbons, JOURNAL OF ALLOYS AND COMPOUNDS, 262, 1997.

* Filoti G, Kuncser V, Palade P, Micu IF, Ovidiu Crisan, On the passivation of the metallic surfaces from the nuclear plant water circuits, HYPERFINE INTERACTIONS, 112 (1-4), 1998.

* Rosenberg M, Kuncser V, Ovidiu Crisan, Hernando A, Navarro E, Filoti G, A Mossbauer spectroscopy and magnetic study of FeRh, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 177, 1998.

* Ovidiu Crisan, Le Breton JM, Nogues M, Machizaud F, Jianu A, Teillet J, Filoti G, Influence of Gd addition on the magnetic properties of Fe-Cu-Nb-Si-B ribbons, JOURNAL DE PHYSIQUE IV, 8 (P2), 1998.

* Ovidiu Crisan, Le Breton JM, Machizaud F, Jianu A, Teillet J, Filoti G, Investigation of the structural properties of crystallized Fe-(Cu)-Sm-B ribbons, JOURNAL DE PHYSIQUE IV, 8 (P2), 1998.

* Ovidiu Crisan, Le Breton JM, Jianu A, Maignan A, Nogues M, Teillet J, Filoti G, Structural and magnetic properties of magnetoresistive Cu-Co-Fe ribbons, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 197, 1999.

* Ovidiu Crisan, Le Breton JM, Maignan A, Machizaud F, Jianu A, Teillet J, Filoti G, Structural refinement effect on the magnetoresistive properties of annealed melt spun Cu-Co-(Fe-Si) ribbons, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 195 (2), 1999.

* Ovidiu Crisan, Le Breton JM, Jianu A, Maignan A, Nogues M, Teillet J, Filoti G, A magnetic study of magnetoresistive Cu-(SmCo5)-Fe heterogranular alloys, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 234 (1), 2001.

* Ovidiu Crisan, Labaye Y, Berger L, Greneche JM, Magnetic properties of nanocrystalline materials: A Monte Carlo simulation, PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 189 (3), 2002.

* Berger L, Labaye Y, Ovidiu Crisan, Greneche JM, Coey JMD, Monte Carlo simulation of the magnetization of a ferromagnet with antiphase boundaries, JOURNAL OF APPLIED PHYSICS, 91 (10), 2002.

* Ovidiu Crisan, Labaye Y, Berger L, Coey JMD, Greneche JM, Exchange coupling effects in nanocrystalline alloys studied by Monte Carlo simulation, JOURNAL OF APPLIED PHYSICS, 91 (10), 2002.

* Labaye Y, Ovidiu Crisan, Berger L, Greneche JM, Coey JMD, Surface anisotropy in ferromagnetic nanoparticles, JOURNAL OF APPLIED PHYSICS, 91 (10), 2002.

* Randrianantoandro N, Labaye I, Berger L, Ovidiu Crisan, Grafoute M, Calvayrac F, Greneche JM, High temperature magnetic behaviour of iron-based nanocrystalline alloys, JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 4 (2), 2002.

* Ovidiu Crisan, Le Breton JM, Machizaud F, Labaye Y, Filoti G, Crystallization processes and resulting phase structure of Sm-Fe-B melt-spun ribbons, JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 242, 2002.

* Ovidiu Crisan, Le Breton JM, Nogues M, Machizaud F, Filoti G, Magnetism and phase structure of crystallized Sm-Fe-B melt spun ribbons, JOURNAL OF PHYSICS-CONDENSED MATTER, 14 (47), 2002.

* Le Breton JM, Ovidiu Crisan, A Mossbauer investigation of amorphous Sm-Fe-B ribbons under applied field, JOURNAL OF ALLOYS AND COMPOUNDS, 351 (1-2), 2003.

* Ovidiu Crisan, Greneche JM, Le Breton JM, Crisan AD, Labaye Y, Berger L, Filoti G, Magnetism of nanocrystalline Finemet alloy: experiment and simulation, EUROPEAN PHYSICAL JOURNAL B, 34 (2), 2003.

* Ovidiu Crisan, J.M. Le Breton and G. Filoti, Nanocrystallization of soft magnetic Finemet-type amorphous ribbons, Sensors and Actuators A: Physical, 106 (1-3), 2003.

* Ovidiu Crisan, M. Angelakeris, N.K. Flevaris, N. Sobal and M. Giersig, Anisotropies in ferromagnetic nanoparticles: simulation and experimental approach, Sensors and Actuators A: Physical, 106 (1-3), 2003.

* Ovidiu Crisan, Angelakeris M, Flevaris NK, Filoti G, Magnetism and anisotropy in core-shell nanoparticles, JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 5 (4), 2003.

* Crisan AD, LeBreton JM, Ovidiu Crisan, Filoti G, Metastable phases and crystallization products in nanocrystalline FINEMET-type alloys with RE addition, JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 5 (3), 2003.

* Ovidiu Crisan, Labaye Y, Berger L, Greneche JM, Monte Carlo simulation of magnetic properties in nanocrystalline-like systems, Institute of Physics Publishing, Journal of Physics - Condensed Matter, 15 (37), 2003.

* M. Angelakeris, Ovidiu Crisan, E. Papaioannou, N. Vouroutzis, I. Tsiaoussis, E. Pavlidou, A. D. Crisan, I. Kostic, N. Sobal, M. Giersig and N. K. Flevaris, Fabrication of novel magnetic nanostructures by colloidal bimetallic nanocrystals and multilayers, Elsevier Science, Materials Science and Engineering C - Biomimetic and Supramolecular Systems, 23 (6-8), 2003.

* Larde R, Le Breton JM, Richomme F, Teillet J, Hauet A, Maignan A, Ovidiu Crisan, Influence of the SMCo5 hard magnetic phase on the magnetoresistive properties of Cu-Fe ribbons, Journal of Physics - Condensed Matter, 16 (41), 2004.

* Ovidiu Crisan, M. Angelakeris, N. Vouroutzis, A. D. Crisan, E. Pavlidou, I. Kostic, N. Sobal, M. Giersig and N. K. Flevaris, Magnetic nanostructures obtained by colloidal crystallization onto patterned substrates, Journal of Magnetism and Magnetic Materials, 272-276, 2004.

* Ovidiu Crisan, M. Angelakeris, M. Noguès, Th. Kehagias, Ph. Komninou, N. Sobal, M. Giersig and N. K. Flevaris, Correlation of structure and magnetism of AgCo nanoparticle arrays, Journal of Magnetism and Magnetic Materials, 272-276, 2004.

* Ovidiu Crisan, J. M. Le Breton, A. D. Crisan and F. Machizaud, Influence of Gd addition on the magnetism and structure of Finemet-type nanocrystalline alloys, Journal of Magnetism and Magnetic Materials, 272-276, 2004.

* V. Kuncser, M. Valeanu, F. Lifei, D. Predoi, P. Palade, G. Schinteie, Ovidiu Crisan and G. Filoti, Magnetic interactions and spin structure in composite Fe/Nd2Fe14B systems, Elsevier Science, Journal of Magnetism and Magnetic Materials, 272-276, 2004.

* V. Kuncser, W. Keune, B. Sahoo, E. Duman, M. Acet, F. Radu, M. Valeanu, Ovidiu Crisan and G. Filoti, Magnetic interactions and spin configuration in FeRh and Fe/FeRh systems, Elsevier Science, Journal of Magnetism and Magnetic Materials, 272-276, 2004.

* Ovidiu Crisan, Tornau EE, Petrauskas V, Angelakeris M, Monte Carlo simulation study of magnetic behaviour of core-shell bimetallic nanoparticles, WILEY-VCH VERLAG GMBH, Physica Status Solidi (c), 1, 2004.

* S. Mourdikoudis, K. Simeonidis, I. Tsiaoussis, Makis Angelakeris, C. Dendrinou-Samara, O. Kalogirou, Jean-Marc Greneche, Ovidiu Crisan and George Filoti, A deeper study on heteregeneous thermal decomposition synthesis and characterization of Fe-oxide, Modern Physics Letters B, 2007.

* Ovidiu Crisan, Radu Nicula, Alina-Daniela Crisan and Eberhard Burkel, Thermally induced phase transitions in Fe/Fe3O4 mixed nanopowders, Institute of Physics Publishing, Journal of Physics D: Applied Physics, 2007.

* Ovidiu Crisan, Jean-Marc Greneche, Ivan Skorvanek, Radu Nicula, Eberhard Burkel, George Filoti, Structural and magnetic characterization of Fe/Fe3O4 mixed nanopowders, Institute of Physics Publishing, Journal of Physics D: Applied Physics, 2007.

* Ovidiu Crisan, Makis Angelakeris, Thomas Kehagias and George Filoti, Hybrid approach to the synthesis of FePt / Fe3B nanocomposite magnets, Journal of Optoelectronics and Advanced Materials, 2007.

* Ovidiu Crisan, Greneche JM, Labaye Y, Berger L, Crisan AD, Angelakeris M, LeBreton JM, Flevaris NK, Magnetic properties of nanostructured materials - Monte Carlo simulation and experimental approach for nanocrystalline alloys and core-shell nanoparticles, Springer Verlag, Idzikowski B, Svec P, Miglierini M, Properties and Applications of Nanocrystalline Alloys from Amorphous Precursors, NATO Science Series II: Mathematics, Physics and Chemistry 184, 2005.

* Daniela Predoi, Ovidiu Crisan, A. Jitianu, M.C. Valsangiacom, M. Raileanu, M. Crisan and M. Zaharescu, Iron oxide in a silica matrix prepared by the sol-gel method, Elsevier Science, Thin Solid Films, DOI: 10.1016/j.tsf.2006.11.148, 2007.

* Evaldas Tornau, Vytas Petrauskas and Ovidiu Crisan, Effect of Surface Anisotropy in Core-Shell Bimetallic Nanoparticles, Polish Academy of Sciences, Institute of Physics, Acta Physica Polonica A, 107 (2), 2005.

* Alina-Daniela Crisan, Radu Nicula, Ovidiu Crisan, and Eberhard Burkel, Thermally and pressure activated phase evolution in Fe–Pt–Nb–B melt spun ribbons, Elsevier Science, Materials Science and Engineering C - Biomimetic and Supramolecular Systems, doi:10.1016/j.msec.2006.06.033, 2006.

* Alina-Daniela Crisan, Ovidiu Crisan, Nirina Randrianantoandro, Mihaela Valeanu, Mircea Morariu and Eberhard Burkel, Crystallization processes in Fe–Pt–Nb–B melt spun ribbons, Elsevier Science, Materials Science & Engineering C - Biomimetic and Supramolecular Systems, doi:10.1016/j.msec.2006.08.031, 2006.

* Ovidiu Crisan, Alina-Daniela Crisan, Nirina Randrianantoandro, Radu Nicula and Eberhard Burkel, Crystallization processes and phase evolution in amorphous Fe–Pt–Nb–B alloys, Elsevier Science, Journal of Alloys and Compounds, DOI:10.1016/j.jallcom.2006.08.331, 2006.

* Torsten Klein, Ralf Röhlsberger, Ovidiu Crisan, Kai Schlage and Eberhard Burkel, Magnetic structure and interlayer exchange coupling in spring magnets—studied via nuclear resonant scattering, Elsevier Science, Thin Solid Films, 515 (4), 2006.

* Ovidiu Crisan, Jean-Marie Le Breton, Alina-Daniela Crisan, George Filoti, Study of crystallization processes in Gd-substituted Finemet alloys, ELSEVIER SCIENCE, Journal of Alloys and Compounds, 422 (1-2), 2006.

* Ovidiu Crisan , M. Angelakeris, K. Simeonidis, Th. Kehagias, Ph. Komninou, M. Giersig and N.K. Flevaris, Structure effects on the magnetism of AgCo nanoparticles, Elsevier, Acta Materialia, 54 (19), 2006.