Welcome

Welcome to my web page, here you can find information about my interests and my curriculum vitae.

I am currently working on:

  • Study of the magnetic polarization of V in V/Cr(001) interfaces by means of Spin Polarized Scanning Tunneling Microscopy (SP-STM).
  • Study of magnetic polarization on polycrystalline Fe/V interfaces with enhanced roughness.
  • Study and modeling of magnetization reversal anomalies at the hard axis of different epitaxial systems.
  • Magneto-plasmonics: study and modeling of the influence of strong surface plasmon polariton (SPP) generated electromagnetic fields on the enhanced magneto-optical response of different systems, as Au/Co/Au trilayers, Au/Co gratings or Au/Co nanocomposite systems.


News


July 2009.- Publication in Physical Review B : “Enhancement of induced V polarization due to rough Fe/V interfaces”. C. Clavero, J. R. Skuza, Y. Choi, D. Haskel, B. J. Kirby, C. Sánchez-Hanke, R. Loloee, M. R. Fitzsimmons, R. A. Lukaszew. Phys. Rev. B 80, 024418 (2009).

April 2009.- Publication in Physical Review B: “Order and phase nucleation in non-equilibrium nano-composite Fe-Pt thin films with perpendicular magnetic anisotropy”, C. Clavero, J. R. Skuza, J. M. García-Martín, A. Cebollada, D. A. Walko and R. A. Lukaszew, Phys. Rev. B. 79, 104436 (2009).

October 2008.- César Clavero named the recipient of the 2008 Outstanding Young Researcher Award from the American Vacuum Society.

Curriculum Vitae

PERSONAL AND CONTACT INFORMATION


College of William and Mary
Department of Applied Science
P.O.Box 8795, Williamsburg, VA 23187

Phone: 757 221 1210
Fax: 757 221 2050

e-mail: cclavero@wm.edu



RESEARCH AND WORK EXPERIENCE


• November 2007- Present: Associate Research Post-doc at the College of William & Mary, Williamsburg, VA, USA. Supervisor: R. A. Lukaszew (ralukaszew@wm.edu).

• June 2007-October 2007: Associate Research Post-doc at the University of Toledo, OH, USA. R. A. Lukaszew (ralukaszew@wm.edu).

• February 23rd 2007: Universidad Autónoma de Madrid, Physics PhD. diploma. Download the manuscript.

• October 2002 - June 2007: PhD studies at the Fabrication & Characterization of Nanostructures Department of the Instituto de Microelectrónica de Madrid (IMM-CNM-CSIC), Madrid, Spain. Supervisors: A. Cebollada (alfonso@imm.cnm.csic.es) and G. Armelles (gaspar@imm.cnm.csic.es).

• October 2005: Advanced Studies Diploma (DEA) at the Universidad Autónoma de Madrid (Spain).

• September-November 2004 and March-May 2005: two collaboration stays at the Laboratoire Louis Néel of Grenoble (France), working in “Growth of self-organised nanostructures Co/Au”. Supervisor: Olivier Fruchart (olivier.fruchart@grenoble.cnrs.fr).

• September 2001-July 2002: Diploma Thesis at the University of Valladolid
Title: ”Magnetic disaccommodation in hexagonal Barium ferrites with substitution of Titanium”.
Supervisor: Pablo Hernandez (pabloher@ee.uva.es ).

• October 1997- July 2002: Master degree in Physics, University of Valladolid (Spain).


EXPERTISE


• Thin film epitaxial growth and nanoparticle fabrication by means of sputtering and laser ablation. UHV related technology.

• Structural characterization by means of reciprocal space techniques as Reflection High Energy Electron Diffraction (RHEED), X-Ray Diffraction (XRD), X-Ray Reflectometry (XRR), with real space techniques as Scanning Tunneling Microscopy (STM) and Atomic Force Microscope (AFM) and with spectroscopic techniques as Auger Electron Spectroscopy (AES).

• Magnetic and Magneto-optical characterization of thin films and nanostructures by means of Kerr effect techniques and Magnetic Force Microscopy (MFM).

• Real-time Thermal Annealing (RTA) of L10 alloys.

• Optical and magneto-optical response simulations of different multilayer and nanostructured systems.


AWARDS

Recipient of the 2008 Outstanding Young Researcher Award granted by the Thin Film Division of the American Vacuum Society



PUBLICATIONS AND OTHER MERITS


List of publications

  1. E. Navarro, Y. Huttel, C. Clavero, G. Armelles and A. Cebollada. “Capping layer induced magnetic coupling in a 2D nanostructured system”, Applied Physics Letters 84, 2139 (2004).
  2. Y. Huttel, H. Gómez, C. Clavero, A. Cebollada, G. Armelles, E. Navarro, M. Ciria, L. Benito, J. I. Arnaudas and A. J. Kellock, “Cobalt nano-particles deposited and embedded in AlN: magnetic, magneto-optical and morphological properties”, Journal of Applied Physics 96, 1666 (2004).
  3. E. Navarro, Y. Huttel, C. Clavero, A. Cebollada and G. Armelles, “Magnetic coupling between Fe nanoislands induced by capping layer magnetic polarization”, Physical Review B, 69, 224419 (2004).
  4. J. Arbiol, F. Peiró, A. Cornet, C. Clavero, A. Cebollada, G. Armelles and Y. Huttel, “Capping layers-induced structural and compositional modifications of Co nanoparticles ultrathin films”, Applied Physics Letters, 86, 032510 (2005).
  5. C. Martínez Boubeta, C. Clavero, J.M. García-Martín, G. Armelles, A. Cebollada, Ll. Balcells, J. L. Menéndez, F. Peiró, A. Cornet and Michael F.Toney, “Coverage effects on the magnetism of Fe/MgO(001) ultrathin films”, Physical Review B 71, 014407(2005).
  6. C. Clavero, Y. Huttel, A. Cebollada, G. Armelles, J. Arbiol, F. Peiró and A. Cornet, “Size effects in the magneto-optical response of Co nanoparticles”. Physical Review B, 72, 024441 (2005).
  7. P. Hernández-Gómez, C. Clavero, B. Martín, C. Torres, C. De Francisco, J.M Muñoz, O. Alejos, and A. González-Arias, “Study of phase transition in Ti and Sn doped Ba W-type hexa-ferrites by means of magnetic disaccomodation techniques”. Phys. Stat. Sol. (c) 2, 3589 (2005).
  8. C. Clavero, A. Cebollada, G. Armelles, Y. Huttel, J. Arbiol, F. Peiró, A. Cornet, and C. Domínguez, “Magnetism and magneto-optics of Co nanoparticles embedded in dielectric and metallic matrices”, Nanotechnology II. Edited by Lugli, Paolo; Kish, Laszlo B.; Mateos, Javier. Proceedings of the SPIE, Volume 5838, pp. 266-275 (2005).
  9. C. Clavero, J. M. García-Martín, Y. Huttel, S. Estradé, J. Arbiol, F. Peiró, Ll. Balcells, G. Armelles and A. Cebollada. “Perpendicular magnetic anisotropy in chemically disordered V buffered FePd(100) alloy thin films”, J. Appl. Phys. 99, 073903 (2006).
  10. C. Clavero, J. M. García-Martín, J. L. Costa Kramer, Y. Huttel, R. A. Lukaszew, A. J. Kellock, G. Armelles and A. Cebollada. “Temperature and thickness influence in the perpendicular magnetic anisotropy of FePd thin films sputtered on MgO(001)”. Physical Review B 73,174405 (2006).
  11. C. Clavero, B. Sepulveda, G. Armelles, Z. Konstantinović, M. García del Muro, A. Labarta, and X Batlle. “Size mediated control of the optical and magneto-optical properties of Co nanoparticles in ZrO2”. Journal of Applied Physics 100, 074320 (2006).
  12. R. A. Lukaszew, A. Cebollada, C. Clavero, J. M. Garcia-Martín, “Highly ordered FePt and FePd magnetic nano-structures: Correlated structural and magnetic studies”, Physica B 384, 15 (2006).
  13. C. Clavero, G. Armelles, J. Mangueritat, J. Gonzalo, M. García del Muro, A. Labarta and X. Batlle, “Interface effects in the magneto-optical properties of Co nanoparticles in an insulating matrix”, Appl. Phys. Lett. 90, 182506 (2007).
  14. D. P. Kumah , A. Cebollada, C. Clavero, J. M. García-Martín, J. R. Skuza, R. A. Lukaszew and R. Clarke, "Optimizing the planar structure of (111) Au/Co/Au trilayers", J. Phys. D: Appl. Phys. 40, 2699 (2007).
  15. J. R. Skuza, R. A. Lukaszew, E. M. Dufresne, D. A. Walko, C. Clavero, A. Cebollada, C. N. Cionca, and R. Clarke, “Real time structural modification of epitaxial FePt thin films under x-ray rapid thermal annealing using undulator radiation”, Appl. Phys. Lett. 90, 251901 (2007).
  16. B. Presa, R. Matarranz, C. Clavero, J. M. García-Martín, J. F. Calleja and M. C. Contreras, "Morphological and magnetic properties of Co nanoparticle thin films grown on Si3N4", J. Appl. Phys. 102, 053901 (2007).
  17. J. B. González-Díaz, A. García-Martín, G. Armelles, J. M. García-Martín, C. Clavero, A. Cebollada, R. A. Lukaszew, J. R. Skuza, D. P. Kumah, and R. Clarke. “Surface-magnetoplasmon nonreciprocity effects in noble-metal/ferromagnetic heterostructures”. Phys. Rev. B 76, 153402 (2007).
  18. Y. Huttel, C. Clavero, G. van der Laan, P. Bencok, T. K. Johal, J. Claydon, G. Armelles and A. Cebollada. “Interface effects, magnetic and magneto-optical properties of Al/Co/V/MgO(100) structures”. Phys. Rev. B 77, 064411 (2008).
  19. C. Clavero, L. Martínez, A. García-Martín, J. M. García-Martín, Y. Huttel, N. D. Telling, G. van der Laan, A. Cebollada, G. Armelles. “Morphology and capping effects in the magnetic and magneto-optical properties of nanoparticulate Co films”, Phys. Rev. B. 77, 094417 (2008).
  20. C. Clavero, J. R. Skuza, Y. Choi, D. Haskel, J. M. García-Martín, A. Cebollada, R. A. Lukaszew, “Control of the perpendicular magnetic anisotropy of FePd films via Pd capping deposition”, Appl. Phys. Lett. 92, 162502 (2008).
  21. C. Clavero, J. R. Skuza, Y. Choi, D. Haskel, J. M. García-Martín, A. Cebollada, and R. A. Lukaszew, ‘Erratum: Control of the perpendicular magnetic anisotropy of FePd films via Pd capping deposition’, [Appl. Phys. Lett. 92, 162502 (2008)], Appl. Phys. Lett. 92, 209902 (2008).
  22. A. Cebollada, J. M. García Martín, C. Clavero, Ll. Balcells, S. Estradé, J. Arbiol, F. Peiró, C. Smith, R. Clarke, L. Martínez, Y. Huttel, E. Román, N. D. Telling, G. van der Laan, “Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition”. Phys. Rev. B. 79, 014414 (2009).
  23. C. Clavero, J. R. Skuza, J. M. García-Martín, A. Cebollada, D. A. Walko and R. A. Lukaszew, “Order and phase nucleation in non-equilibrium nano-composite Fe-Pt thin films with perpendicular magnetic anisotropy”, Phys. Rev. B. 79, 104436 (2009).
  24. C. Clavero, J. R. Skuza, Y. Choi, D. Haskel, B. J. Kirby, C. Sánchez-Hanke, R. Loloee, M. R. Fitzsimmons, R. A. Lukaszew, “Enhancement of induced V polarization due to rough Fe/V interfaces”. Phys. Rev. B 80, 024418 (2009).




SELECTED CONFERENCE PRESENTATIONS

(Talk) 52nd Annual Conference on magnetism and Magnetic Materials, November 5-9, 2007, Tampa, FL, USA. “Pd overlayer effects in highly ordered FePd nanoparticled films”, C. Clavero, J. R. Skuza, R. A. Lukaszew, A. Cebollada, Y. Choi, D. Haskel.

(Invited Talk) AVS 55th International Symposium and Exhibition, Boston, USA. “New Developments in Magneto-Plasmonic Devices”, C. Clavero, J. R. Skuza, K. Yang, R. A. Lukaszew.




INTERNATIONAL CONFERENCE PRESENTATIONS


ICMFS2003: 18th International Colloquium on Magnetic Films and Surfaces, Madrid, Spain, July 2003. Three contributed presentations:

1. “Magnetism in ultrathin Fe/MgO(001) films grown by sputtering”, C. Martínez Boubeta, Ll. Balcells, C. Clavero, F. García, G. Armelles, A. Cebollada, J. L. Menéndez and M.F. Toney. Type: Poster.

2. “Size dependency of the magneto-optical properties of small Fe(110) islands and modification of their magnetic properties by a capping layer”. E. Navarro, Y. Huttel, A. Cebollada, C. Clavero and G. Armelles. Type: Poster.

3. “Size dependent structural, magneto-optical and magnetic properties of Co nanoparticles”. H. Gómez, C. Clavero, Y. Huttel, A. Cebollada, G. Armelles, E. Navarro, M. Ciria, L. Benito and J.I. Arnaudas. Type: Poster

4. ICM 2003: International Conference on Magnetism, Rome, Italy August 2003: “Nitrogen doping effects in magnetic FePd alloys”, M. S. Martín-González, A. Cebollada, G. Armelles, S. Melle, C. Clavero, J. Anguita and F. Briones. Type: Poster.

5. International Workshop on Nano-Scale Magnetoelectronics, Nagoya, Japan, November 2003: “Magnetotoransport in ultrathin Fe/MgO(001) films”, C. Martínez Boubeta, Ll. Balcells, C. Clavero, F. García, G. Armelles, A. Cebollada, J. L. Menéndez and M. F. Toney. Type: Poster.

6. 2004 MRS Spring Meeting, San Francisco, CA, April 2004: “Capping layer controlled magnetic coupling between Fe nanoislads”, E. Navarro, Y. Huttel, C. Clavero, G. Armelles and A. Cebollada. Type: Poster.

7. 13 th European Microscopy Congress, Antwerb, Sweden, August 2004: “Interface reactivity of magnetic Co nanoparticles with Pt, AlN and MgO capping layers”, . Arbiol, F. Peiró, A. Cornet, C. Clavero, Y. Huttel, A. Cebollada, G. Armelles. Type: Poster.

8. TNT Trends in Nanotechnology, Segovia, Spain, September 2004: “Matrix and growth effects in the structure and magnetism of Co nanoparticles ultra thin films”, C. Clavero, Y. Huttel, A. Cebollada, G. Armelles, Y. Huttel, J. Arbiol, F. Peiró, A. Cornet. Type:Poster.

9. 51st American Vacuum Society Symposium, Anaheim, California, November 2004: “Artificially and self organized FePd (001) nanoparticles: fabrication, magnetic and magneto-photonic properties”, J. V. Anguita, G. Armelles, A. Bengoechea, A. Cebollada, C. Clavero, J. L. Costa Krämer, A. García-Martín, J. M. García-Martín, F. Torres, Y. Huttel, E. Navarro, Ll. Balcells, V.F. Puntes, C. Martínez Boubeta, J. L. Menéndez, M. F. Toney. Type: Invited talk.

10. Microtechnologies for the New Millennium 2005, Sevilla, Spain, May 2005: “Magnetism and magneto-optics of Co nanoparticles embedded in dielectric and metallic matrices”. C. Clavero, Y. Huttel, A. Cebollada, G. Armelles, J. Arbiol, F. Peiró, A. Cornet. Type: Poster

11. XXII Reunión Bienal de la Sociedad de Microscopía de España, Granada, Spain, June 2005: “Dependencia con la temperatura de la difusión del V de la capa tampón en capas magnéticas de FePd.”, S. Estradé, J. Arbiol, F. Peiró, A. Cornet, C. Clavero, Y. Huttel, A. Cebollada y G. Armelles. Type: Poster.

12. XIII International Materials Research Congress, Cancún, Mexico, August 21-25, 2005: “Structure-magnetism correlations in continuous and self-organized, high anisotropy epitaxial FePd alloys”, A. Cebollada, C. Clavero, J. L. Costa-Krämer, J. M. García-Martín, G. Armelles, M. S. Martín-González, J. Anguita, F. Briones, Y. Huttel, Ll. Balcells, R. A. Lukaszew, S. Estradé, J. Arbiol, and F. Peiró. Type: invited talk.

13. TNT Trends in Nanotechnology, Oviedo, Spain, August 2005: “Magneto optical properties and reversal mechanisms in large area arrays of perpendicularly magnetized nanodots”. B. te Dorsthorst, J. L. Costa-Krämer, R. Murillo, C. Clavero, G. Armelles, M. S. Martín-González, J. M. García, R. Álvarez-Sánchez, F. Briones and L. Abelmann. Type: Poster.

14. First annual workshop on Advances in Nanophotonics, Heraklion, Creta, Greece, October 2005: “Magnetism and magneto-optics of Co nanoparticles embedded in dielectric and metallic matrices”, C. Clavero, Y. Huttel, A. Cebollada, G. Armelles, J. Arbiol, F. Peiró, A. Cornet. Type: Poster.

15. European Conference on Surface Science, Berlin, Germany, September 2005: “Higly ordered L10 FePt nanomagnets.”, R. A. Lukaszew, A. Cebollada, J. M. García Martín, M. Mitra and C. Clavero. Type: Poster.

16. AVS 52th International Symposium, Boston, Massachussets, October, 2005: “Correlated AFM/MFM and Magneto-Optical Studies on Epitaxial L1o FePd thin films”, R. A. Lukaszew, J. Skuza, A. Cebollada, C. Clavero and J.M. Garcia-Martín.

17. 2006 APS March Meeting, Baltimore, Maryland, March 2006: “Enhancement of L10 Order in FePt Thin Films and X-ray Rapid Thermal Annealing (XRTA)”, R. A. Lukaszew, J. Skuza, E. Dufresne, C. Cionca, A. Cebollada, C. Clavero, and C. Lind. Type: talk.

18. 2006 MRS Spring Meeting, San Francisco, California, April 2006, “L10 Order In FePt Thin Films And X-Ray Rapid Thermal Annealing (XRTA)”, R. A. Lukaszew, J. Skuza, C. Clavero, A. Cebollada and E. Dufresne. Type: talk.

19. XV International Materials Research Congress, Cancún, Mexico, August 2006, “Magnetic nanoparticles obtained by advanced physical methods for magneto-plasmonic devices”, J. M. García-Martín, A. Cebollada, C. Clavero, J. B. González, R. Asenjo, A. García-Martín, G. Armelles, C. Smith, D. Kumah, R. Clarke, Ll. Balcells, S. Estradé, and F. Peiró. Type: talk.

20. Icon2006: International conference of nanotechnology, Choroní, Venezuela, May 2006, "Combining plasmonic and magneto-optical activity as a way to control light in active nano-optical devices", J. B. González-Díaz, A. García-Martín, G. Armelles, A. Cebollada, J. M. García-Martín, C. Clavero, R. Clarke, D. Kumah, R. A. Lukaszew and J. Skuza. Type: Poster.

21. Latin American Symposium of Solid State Physics (SLAFES), Puebla, Mexico, November 2006. G. Armelles, A. Cebollada, C. Clavero, A. García-Martín, J.M. García-Martín, J. B. González-Díaz, L. M. Lechuga, B. Sepúlveda, R.Clarke(a), D. Kumah, R. A. Lukaszew and J. Skuza. “Optical Plasmon Resonances & Magnetooptical Properties of Metallic Nanostructures”. Type: Invited talk.

22. 3ª Reunión de Tecnología y Aplicaciones Biológicas de Partículas Magnéticas (Xarxa Temàtica Tecnologia i Aplicacions de Nanopartícules Magnètiques en els àmbits de les Ciències de la Vida i Mediambiental. III Pla de Recerca de Catalunya), Barcelona (Spain), Octuber 2006, “Magnetic nanoparticles obtained by advanced physical methods for magneto-plasmonic devices”, J.M. García-Martín, C. Clavero, J.B. González, R. Asenjo, A. García-Martín, L. Lechuga, A. Cebollada, G. Armelles, C. Smith, D. Kumah, R. Clarke, Ll. Balcells, B. Martínez, S. Estradé, F. Peiró. Type: talk

23. 10 th Joint MMM/ Intermag Conference, Baltimore, Maryland, USA, January 2007. “Morphology dependent capping layer effects in ultra-thin Co films and nanoparticles”, C. Clavero, J. M. García-Martín, A. Cebollada, G. Armelles, E. Navarro, Y. Huttel. Type: poster.

24. 10 th Joint MMM/ Intermag Conference, Baltimore, Maryland, USA, January 2007. “Surface plasmon resonance effects in the Magneto Optical activity of noble metal-ferromagnet ultrathin films”. A. Cebollada , J. B. González-Díaz, A. García-Martín, G. Armelles, J. M. Garcia-Martin, C. Clavero, R.Clarke, D.Kumah, R.A.Lukaszew, J.Skuza. Type: talk.

25. 4 th Nanospain Workshop, Seville, Spain, March 2007. “Morphology dependent capping layer effects in Co films and nanoparticles”. C. Clavero, J. M. García-Martín, A. García-Martín, Y. Huttel, E. Navarro, A. Cebollada, G. Armelles. Type: poster.

26. PhOREMOST “ADVANCES IN NANOPHOTONICS" Workshop, Istanbul, Turkey, September 2007. “On the effects of incorporating Magneto-Optically active materials in Plasmonic structures: Magneto-Plasmonics”. J.B. González-Díaz, A. García-Martín, G. Armelles, J.M. García-Martín, C. Clavero, A. Cebollada. Type: poster.

27. TNT Trends in Nanotechnology, San Sebastian, Spain, September 2007. “Surface plasmon resonance effects in the magneto-optical activity of noble metal-ferromagnet utrathin films”. A. García-Martín, J. B. González-Díaz, G. Armelles, J.M. García-Martín, C. Clavero, A. Cebollada, R. Clarke, D. Kumah, R.A. Lukaszew, J. Souza. Type: poster.

28. MORIS 2007 Workshop on Thermal and Optical Magnetic Materials and Devices, Pittsburgh, PA, USA. September 2007. “Fabrication and real time characterization of highly anisotropic nanomagnets”. J. R. Skuza, C. Clavero, R. A. Lukaszew, D. A. Walko, and R. Clarke. Type: poster.

29. AVS 54th International Symposium & Exhibition, September 2007, Seattle, WA, USA. “Fabrication and Real Time Characterization of Highly Anisotropic Magnetic Nanostructures”, J. R. Skuza, R. A. Lukaszew, C. Clavero, D. A. Walko, R. Clarke. Type: Talk.

30. (Talk) 52nd Anual Conference on magnetism and Magnetic Materials, November 5-9, 2007, Tampa, FL, USA. “Fabrication and real time characterization of highly anisotropic nanomagnets”, J. R. Skuza , C. Clavero, , R. A. Lukaszew, A. Cebollada, D. A. Walko, R. Clarke.

31. (Poster) 2007 MRS fall meeting, November 2007, Boston, MA, USA, “Nanofabrication and Characterization of Magneto-plasmonic Materials”, J. R. Skuza, C. Clavero, M. N. Sestak, N. M. Dushkina, and R. A. Lukaszew.

32. (Talk) IEEE International Magnetism Conference 2008, Madrid, Spain “Highly anisotropic FePt nanomagnets obtained via Fe ion implantation on Pt films”, R. A. Lukaszew, C. Clavero, J. Skuza.



PROFESSIONAL MEMBERSHIP

• American Vacuum Society AVS (Since 2007).
• Institute of Electrical and Electronics Engineers IEEE (Since 2007).

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