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Grégoire DE LOUBENS

Service de Physique de l'Etat Condensé

Laboratoire Nanomagnétisme et Oxydes

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Position

Researcher in the Laboratoire Nanomagnétisme et Oxydes of SPEC.

Research topics

Magnetization dynamics

Nanomagnetism

Spintronics

Magnetic resonance force microscopy

More informations on: gyrotropic mode in a vortex-state nano-disk ; dynamical reversal of a vortex core ; dynamical dipolar coupling between nano-disks ; electronic control of relaxation in a magnetic insulator

CV

Dec. 2017 : Habilitation à Diriger des Recherches, Université Paris-Sud. Magnetization dynamics in magnetic nanostructures: spectroscopy, spin transfer effects and nonlinearities.

Jan. 2006 – Apr. 2008 : Postdoc at New York University, Department of Physics in Prof. Andrew D. Kent's Lab (mesoscopic magnetism) Research project: Magnetization relaxation and coherence in single molecule magnets. Also involved in projects related to spintronics and FMR.

Oct. 2002 – Dec. 2005 : PhD in Physics. Degree of Université Paris-Sud (UFR d'Orsay) Dissertation topic: Microwave spectroscopy of a metallic magnetic hybrid nanostructure, under the direction of Dr. Olivier Klein (CEA/DRF/INAC/SPINTEC)

Sept. 2001 – June 2002 : Master of science in Condensed Matter Physics at the Université Paris-Sud.

Sept. 1998 – June 2001 : Engineering degree of École Centrale de Paris.

Former PhD students

  1. 2014 – 2017 : Xavier de Milly (directeur de thèse), Manipulation of the mutual synchronisation in a pair of spin-torque oscillators.
  2. 2011 – 2014 : Christian Hahn (co-encadrant ; directeur de thèse : Olivier Klein), Magnetization dynamics and pure spin currents in YIG/normal-metal systems.
  3. 2011 – 2014 : Abbass Hamadeh (co-encadrant ; directeur de thèse : Olivier Klein), Synchronization of spin transfer nano-oscillators.
  4. 2009 – 2012 : Benjamin Pigeau (co-encadrant ; directeur de thèse : Olivier Klein), Magnetic vortex dynamics in nanostructures.

Publications

My publications on ArXiv.org

My profile on Google Scholar

  1. M. Evelt, L. Soumah, A. B. Rinkevich, S. O. Demokritov, A. Anane, V. Cros, Jamal Ben Youssef, G. de Loubens, O. Klein, P. Bortolotti, V. E. Demidov, Emission of coherent propagating magnons by insulator-based spin-orbit-torque oscillators, Phys. Rev. Appl. 10, 041002 (2018)

  2. N. Beaulieu, N. Kervarec, N. Thiery, O. Klein, V. Naletov, H. Hurdequint, G. de Loubens, J. Ben Youssef, N. Vukadinovic, Temperature Dependence of Magnetic Properties of a Ultrathin Yttrium-Iron Garnet Film Grown by Liquid Phase Epitaxy: Effect of a Pt Overlayer, IEEE Magn. Lett. 9, 1-5 (2018)

  3. N. Thiery, V. V. Naletov, L. Vila, A. Marty, A. Brenac, J.-F. Jacquot, G. de Loubens, M. Viret, A. Anane, V. Cros, J. Ben Youssef, N. Beaulieu, V. E. Demidov, B. Divinskiy, S. O. Demokritov, O. Klein, Electrical properties of epitaxial yttrium iron garnet ultrathin films at high temperatures, Phys. Rev. B 97, 064422 (2018)

  4. N. Thiery, A. Draveny, V. V. Naletov, L. Vila, J. P. Attané, C. Beigné, G. de Loubens, M. Viret, N. Beaulieu, J. Ben Youssef, V. E. Demidov, S. O. Demokritov, A. N. Slavin, V. Tiberkevich, A. Anane, P. Bortolotti, V. Cros, O. Klein, Nonlinear spin conductance of yttrium iron garnet thin films driven by large spin-orbit torque, Phys. Rev. B 97, 060409(R) (2018)

  5. M. Cubukcu, O. Boulle, N. Mikuszeit, C. Hamelin, T. Brächer, N. Lamard, M.-C. Cyrille, L. Buda-Prejbeanu, K. Garello, I. M. Miron, O. Klein, G. de Loubens, V. V. Naletov, J. Langer, B. Ocker, P. Gambardella, G. Gaudin, Ultra-Fast Perpendicular Spin-Orbit Torque MRAM, IEEE Trans. Magn. 54, 1-4 (2018)

  6. Y. Li, X. de Milly, O. Klein, V. Cros, J. Grollier, G. de Loubens, Selective control of vortex polarities by microwave field in two robustly synchronized spin-torque nano-oscillators, Appl. Phys. Lett. 112, 022405 (2018)

  7. S. Sangiao, C. Magén, D. Mofakhami, G. de Loubens, J. M. de Teresa, Magnetic properties of optimized cobalt nanospheres grown by focused electron beam induced deposition (FEBID) on cantilever tips, Beilstein J. Nanotechnol. 8, 2106-2115 (2017)

  8. Y. Li, X. de Milly, F. Abreu Araujo, O. Klein, V. Cros, J. Grollier, G. de Loubens, Probing Phase Coupling Between Two Spin-Torque Nano-Oscillators with an External Source, Phys. Rev. Lett. 118, 247202 (2017)

  9. R. Lebrun, J. Grollier, F. Abreu Araujo, P. Bortolotti, V. Cros, A. Hamadeh, X. de Milly, Y. Li, G. de Loubens, O. Klein, S. Tsunegi, H. Kubota, K. Yakushiji, A. Fukushima, S. Yuasa, Driven energy transfer between coupled modes in spin-torque oscillators, Phys. Rev. B 95, 134444 (2017)

  10. G. de Loubens and M. Bailleul, Microwave nanomagnetism: spin torque oscillators and magnonics, in Nanomagnetism: Applications and Perspectives, C. Fermon, M. Van de Voorde Eds. (Wiley, 2017)

  11. V. Demidov, S. Urazhdin, G. de Loubens, O. Klein, V. Cros, A. Anane, S. Demokritov, Magnetization oscillations and waves driven by pure spin currents, Physics Reports 673, 1-31 (2017)

  12. J.-Y. Chauleau, M. Boselli, S. Gariglio, R. Weil, G. de Loubens, J.-M Triscone, M. Viret, Efficient spin-to-charge conversion in the 2D electron liquid at the LAO/STO interface, EPL 116, 17006 (2016)

  13. V. E. Demidov, M. Evelt, V. Bessonov, S. O. Demokritov, J. L. Prieto, M. Muñoz, J. Ben Youssef, V. V. Naletov, G. de Loubens, O. Klein, M. Collet, P. Bortolotti, V. Cros, A. Anane, Direct observation of dynamic modes excited in a magnetic insulator by pure spin current, Sci. Rep. 6, 32781 (2016)

  14. B. Taurel, T. Valet, V. V. Naletov, N. Vukadinovic, G. de Loubens, O. Klein, Complete mapping of the spin-wave spectrum in a vortex-state nanodisk, Phys. Rev. B 93, 184427 (2016)
  15. M. Evelt, V. E. Demidov, V. Bessonov, S. O. Demokritov, J. L. Prieto, M. Munoz, J. Ben Youssef, V. V. Naletov, G. de Loubens, O. Klein, M. Collet, K. Garcia-Hernandez, P. Bortolotti, V. Cros, A. Anane, High-efficiency control of spin-wave propagation in ultra-thin yttrium iron garnet by the spin-orbit torque, Appl. Phys. Lett. 108, 172406 (2016)
  16. A. S. Jenkins, R. Lebrun, E. Grimaldi, S. Tsunegi, P. Bortolotti, H. Kubota, K. Yakushiji, A. Fukushima, G. de Loubens, O. Klein, S. Yuasa, V. Cros, Spin-torque resonant expulsion of the vortex core for an efficient radiofrequency detection scheme, Nature Nanotech. 11, 360–364 (2016)
  17. M. Collet, X. de Milly, O. d’Allivy Kelly, V.V. Naletov, R. Bernard, P. Bortolotti, J. Ben Youssef, V.E. Demidov, S.O. Demokritov, J.L. Prieto, M. Muñoz, V. Cros, A. Anane, G. de Loubens, O. Klein, Generation of coherent spin-wave modes in yttrium iron garnet microdiscs by spin-orbit torque, Nature Commun. 7, 10377 (2016)
  18. N. Locatelli, A. Hamadeh, F. Abreu Araujo, A. D. Belanovsky, P. N. Skirdkov, R. Lebrun, V. V. Naletov, K. A. Zvezdin, M. Muñoz, J. Grollier, O. Klein, V. Cros, G. de Loubens, Efficient Synchronization of Dipolarly Coupled Vortex-Based Spin Transfer Nano-Oscillators, Sci. Rep. 5, 17039 (2015)
  19. F. Abreu Araujo, A. D. Belanovsky, P. N. Skirdkov, K. A. Zvezdin, A. K. Zvezdin, N. Locatelli, R. Lebrun, J. Grollier, V. Cros, G. de Loubens, O. Klein, Optimizing magnetodipolar interactions for synchronizing vortex based spin-torque nano-oscillators, Phys. Rev. B 92, 045419 (2015)
  20. N. Locatelli, R. Lebrun, V. Naletov, A. Hamadeh, G. de Loubens, O. Klein, J. Grollier, V. Cros, Improved spectral stability in spin transfer nano-oscillators: single vortex versus coupled vortices dynamics, IEEE Trans. Magn. 51, 4300206 (2015)
  21. C. Hahn, G. de Loubens, V. V. Naletov, J. Ben Youssef, O. Klein, M. Viret, Conduction of spin currents through insulating antiferromagnetic oxides, EPL 108, 57005 (2014)
  22. A. Hamadeh, O. d’Allivy Kelly, C. Hahn, H. Meley, R. Bernard, A. H. Molpeceres, V. V. Naletov, M. Viret, A. Anane, V. Cros, S. O. Demokritov, J. L. Prieto, M. Muñoz, G. de Loubens, O. Klein, Full Control of the Spin-Wave Damping in a Magnetic Insulator Using Spin-Orbit Torque, Phys. Rev. Lett. 113, 197203 (2014)
  23. A. S. Jenkins,  E. Grimaldi,  P. Bortolotti,  R. Lebrun,  H. Kubota,  K. Yakushiji, A. Fukushima,  G. de Loubens,  O. Klein,  S. Yuasa, V. Cros, Controlling the chirality and polarity of vortices in magnetic tunnel junctions, Appl. Phys. Lett. 105, 172403 (2014)
  24. A. Hamadeh, N. Locatelli, V. V. Naletov, R. Lebrun, G. de Loubens, J. Grollier, O. Klein, V. Cros, Origin of spectral purity and tuning sensitivity in a vortex-based spin transfer nano-oscillator, Phys. Rev. Lett. 112, 257201 (2014)
  25. H. Lavenant, V. Naletov, O. Klein, G. de Loubens, L. Casado, J. M. de Teresa, Mechanical magnetometry of Cobalt nanospheres deposited by focused electron beam at the tip of ultra-soft cantilevers, Nanofabrication 1, 65-73 (2014)
  26. C. Hahn, V. V. Naletov, G. de Loubens, O. Klein, O. d'Allivy Kelly, A. Anane, R. Bernard, E. Jacquet, P. Bortolotti, V. Cros, J. L. Prieto, M. Muñoz, Measurement of the intrinsic damping constant in individual nanodisks of Y3Fe5O12 and Y3Fe5O12|Pt, Appl. Phys. Lett. 104, 152410 (2014)
  27. A. Hamadeh, N. Locatelli, V. V. Naletov, R. Lebrun, G. de Loubens, J. Grollier, O. Klein, V. Cros, Perfect and robust phase-locking of a spin transfer vortex nano-oscillator to an external microwave source, Appl. Phys. Lett. 104, 022408 (2014)
  28. C. Hahn, G. de Loubens, M. Viret, O. Klein, V. V. Naletov, J. Ben Youssef, Erratum: Detection of Microwave Spin Pumping Using the Inverse Spin Hall Effect [Phys. Rev. Lett. 111, 217204 (2013)], Phys. Rev. Lett. 112, 179901 (2014)
  29. O. V. Sukhostavets, B. Pigeau, S. Sangiao, G. de Loubens, V. V. Naletov, O. Klein, K. Mitsuzuka, S. Andrieu, F. Montaigne, K. Y. Guslienko, Probing the Anharmonicity of the Potential Well for a Magnetic Vortex Core in a Nanodot, Phys. Rev. Lett. 111, 247601 (2013)
  30. C. Hahn, G. de Loubens, M. Viret, O. Klein, V. V. Naletov, J. Ben Youssef, Detection of Microwave Spin Pumping Using the Inverse Spin Hall Effect, Phys. Rev. Lett. 111, 217204 (2013)
  31. G. Melkov, D. Slobodianiuk, V. Tiberkevich, G. de Loubens, O. Klein, A. Slavin, Nonlinear Ferromagnetic Resonance in Nanostructures Having Discrete Spectrum of Spin-Wave Modes, Magnetics Letters 4, 4000504 (2013)
  32. O. d'Allivy Kelly, A. Anane, R. Bernard, J. Ben Youssef, C.Hahn, A. H. Molpeceres, C. Carrétéro, E. Jacquet, C. Deranlot, P. Bortolotti, R. Lebourgeois, J.-C. Mage, G. de Loubens, O. Klein, V. Cros, A. Fert, Inverse spin Hall effect in nanometer-thick yttrium iron garnet/Pt system, Appl. Phys. Lett. 103, 082408 (2013)
  33. C. Hahn, G. de Loubens, O. Klein, M. Viret, V. V. Naletov, J. Ben Youssef, Comparative measurements of inverse spin Hall effects and magnetoresistance in YIG/Pt and YIG/Ta, Phys. Rev. B 87, 174417 (2013)
  34. V. V. Naletov, G. de Loubens, S. Borlenghi, O. Klein, Spin-wave eigenmodes in a normally magnetized nano-pillar in Magnonics: from Fundamentals to Applications, S. O. Demokritov, A. N. Slavin Eds. Topics in Applied Physics 125, pp. 3–15 (Springer, 2013)
  35. B. Pigeau, C. Hahn, G. de Loubens, V. V. Naletov, O. Klein, K. Mitsuzuka, D. Lacour, M. Hehn, S. Andrieu, F. Montaigne, Measurement of the Dynamical Dipolar Coupling in a Pair of Magnetic Nanodisks Using a Ferromagnetic Resonance Force Microscope, Phys. Rev. Lett. 109, 247602 (2012)
  36. V. Castel, J. Ben Youssef, F. Boust, R. Weil, B. Pigeau, G. de Loubens, V. V. Naletov, O. Klein, N. Vukadinovic, Perpendicular ferromagnetic resonance in soft cylindrical elements: Vortex and saturated states, Phys. Rev. B 85, 184419 (2012)
  37. A. Hamadeh, G. de Loubens, V. V. Naletov, J. Grollier, C. Ulysse, V. Cros, O. Klein, Autonomous and forced dynamics in a spin-transfer nano-oscillator: Quantitative magnetic-resonance force microscopy, Phys. Rev. B 85, 140408(R) (2012)
  38. V. V. Naletov, G. de Loubens, G. Albuquerque, S. Borlenghi, V. Cros, G. Faini, J. Grollier, H. Hurdequint, N. Locatelli, B. Pigeau, A. N. Slavin, V. S. Tiberkevich, C. Ulysse, T. Valet, and O. Klein, Identification and selection rules of the spin-wave eigenmodes in a normally magnetized nanopillar, Phys. Rev. B 84, 224423 (2011)
  39. N. Locatelli, V. V. Naletov, J. Grollier, G. de Loubens, V. Cros, C. Deranlot, C. Ulysse, G. Faini, O. Klein,  A. Fert, Dynamics of two coupled vortices in a spin valve nanopillar excited by spin transfer torque, Appl. Phys. Lett. 98, 062501 (2011)
  40. B. Pigeau, G. de Loubens, O. Klein, A. Riegler, F. Lochner, G. Schmidt, L.W. Molenkamp, Optimal control of vortex-core polarity by resonant microwave pulses, Nature Phys., 7, 26–31 (2011)
  41. B. Pigeau, G. de Loubens, O. Klein, A. Riegler, F. Lochner, G. Schmidt, L.W. Molenkamp, V.S. Tiberkevich, A.N. Slavin, A frequency-controlled magnetic vortex memory, Appl. Phys. Lett. 96, 132506 (2010)
  42. W. Chen, G. de Loubens, J.-M. L. Beaujour, J. Z. Sun, A. D. Kent, Spin-torque driven ferromagnetic resonance in a nonlinear regime, Appl. Phys. Lett. 95, 172513 (2009)
  43. G. de Loubens, A. Riegler, B. Pigeau, F. Lochner, F. Boust, K. Y. Guslienko, H. Hurdequint, L. W. Molenkamp, G. Schmidt, A. N. Slavin, V. S. Tiberkevich, N. Vukadinovic, O. Klein, Bistability of Vortex Core Dynamics in a Single Perpendicularly Magnetized Nanodisk, Phys. Rev. Lett. 102, 177602 (2009)
  44. M. Fonin, S. Voss, S. Herr, G. de Loubens, A. D. Kent, M. Burgert, U. Groth, U. Rüdiger, Influence of the ligand shell on the surface orientation of Mn12 single molecule magnets, Polyhedron, 28, 1977 (2009)
  45. O. Klein, G. de Loubens, V. V. Naletov, F. Boust, T. Guillet, H. Hurdequint, A. Leksikov, A. N. Slavin, V. S. Tiberkevich, N. Vukadinovic, Ferromagnetic resonance force spectroscopy of individual submicron-size samples, Phys. Rev. B 78, 144410 (2008)
  46. G. de Loubens, D. A. Garanin, C. C. Beedle, D. N. Hendrickson, A. D. Kent, Magnetization relaxation in the single molecule magnet Ni4 under continuous microwave irradiation, EPL 83, 37006 (2008)
  47. H. M. Quddusi, C. M. Ramsey, J. C. Gonzalez-Pons, J. J. Henderson, E. del Barco, G. de Loubens, A. D. Kent, On-chip integration of high-frequency electron paramagnetic resonance spectroscopy and Hall-effect magnetometry, Rev. Sci. Instrum. 79, 074703 (2008)
  48. W. Chen, J.-M. L. Beaujour, G. de Loubens, A. D. Kent, J. Z. Sun, Spin-torque driven ferromagnetic resonance of Co/Ni synthetic layers in spin valves, Appl. Phys. Lett. 92, 012507 (2008)
  49. W. Chen, G. de Loubens, J.-M. L. Beaujour, A. D. Kent, J. Z. Sun, Finite size effects on spin-torque driven ferromagnetic resonance in spin valves with a Co/Ni synthetic free layer, J. Appl. Phys. 103, 07A502 (2008)
  50. G. de Loubens, A. D. Kent, V. Krymov, G. J. Gerfen, C. C. Beedle, D. N. Hendrickson, High frequency EPR on dilute solutions of the single molecule magnet Ni4, J. Appl. Phys. 103, 07B910 (2008)
  51. G. de Loubens, G. D. Chaves-O'Flynn, A. D. Kent, C. Ramsey, E. del Barco, C. Beedle, D. N. Hendrickson, Magnetization and EPR studies of the single molecule magnet Ni4 with integrated sensors, J. Appl. Phys. 101, 09E104 (2007)
  52. G. de Loubens, V. V. Naletov, M. Viret, O. Klein, H. Hurdequint, J. Ben Youssef, F. Boust, N. Vukadinovic, Magnetic resonance spectroscopy of perpendicularly magnetized Permalloy multilayer disks, J. Appl. Phys. 101, 09F514 (2007)
  53. G. de Loubens, V. V. Naletov, O. Klein, J. Ben Youssef, F. Boust, N. Vukadinovic, Magnetic resonance studies of the fundamental spin-wave modes in individual submicron Cu/NiFe/Cu perpendicularly magnetized disks, Phys. Rev. Lett. 98, 127601 (2007)
  54. V. V. Naletov, G. de Loubens, V. Charbois, O. Klein, V. S. Tiberkevich, A. N. Slavin, Ferromagnetic resonance spectroscopy of parametric magnons excited by a four-wave process, Phys. Rev. B 75, 140405 (R) (2007)
  55. G. de Loubens, V. V. Naletov, O. Klein, Reduction of the spin-wave damping induced by nonlinear effects, Phys. Rev. B 71, 180411(R) (2005)
  56. J. Lambert, G. de Loubens, C. Guthmann, M. Saint-Jean, T. Melin, Dispersive charge transport along the surface of an insulating layer observed by electrostatic force microscopy, Phys. Rev. B 71, 155418 (2005)

Teaching


Sept. 2002 – June 2005: Teaching assistant at École Centrale de Paris. Quantum mechanics and statistical physics classes.

Patents

  1. O. Klein, G. de Loubens, B. Pigeau. Dispositif de stockage à tourbillon magnétique. Année de dépôt 23/04/2009, WO/2010/122126.

Research projects

Sept. 2008 – Feb. 2012 : European project MASTER (NMP-FP7 212257), Microwave Amplification by Spin Transfer Emission Radiation. Coordinated by CEA-SPEC (O. Klein)

Oct. 2009 – Mar. 2011 : ANR project CAPUCINE (Nano-INNOV/RT program), Capteur Multi-fonction à Nanofil de Silicium. Coordinated by CEA-LETI (P. Rey)

Nov. 2009 – Nov. 2012 : ANR project VOICE (ANR-09-NANO-006-01), Spin transfer dynamics of single or interacting magnetic vortices. Coordinated by CNRS-Thales (V. Cros)

Dec. 2010 – Nov. 2014 : ANR project MARVEL (ANR-2010-JCJC-041001), MAgnetic Resonance force spectroscopy of an indiVidual magnEtic nanoparticLe. Coordinated by CEA-SPEC (G. de Loubens)

Jan. 2012 – Jun. 2015 : ANR project SPINNOVA (ANR-11-NANO-0016), Dispositifs SPINtroniques inNOVAnts : des excitations collectives vers les systèmes microondes miniaturisés. Coordinated by CEA-LETI (M.-C. Cyrille)

Jan. 2013 – Dec. 2014 : ANR project TRINIDAD (ASTRID program), EleTRnonIcally coNtrolled YIG nano-waveguiDe as mAgnon Delay line. Coordinated by CEA-SPEC (O. Klein)

Jan. 2013 – Dec. 2016 : European project MOSAIC (ICT-FP7 317950), MicrOwave Spintronics as an AlternatIve Path to Components and Systems for Telecommunications, Storage and Security Applications. Coordinated by CEA-SPINTEC (U. Ebels)

Dec. 2014 – Nov. 2018 : ANR project MEMOS (ANR-14-CE26-0021), MEmoires associatives Magnétiques basées sur des nano-OScillateurs. Coordinated by CNRS-Thales (J. Grollier)

Dec. 2017 – Nov. 2020 : ANR project TOPSKY, Topological properties of magnetic skyrmions and opportunities for novel spintronic devices. Coordinated by CNRS-Thales (V. Cros)

Jan. 2019 – Oct. 2022 : ANR project MAESTRO, MAgnon Excitation in the STRong Out-of-equilibrium regime. Coordinated by CEA-SPEC (G. de Loubens)

 

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