Laboratoire Léon Brillouin

UMR12 CEA-CNRS, Bât. 563 CEA Saclay

91191 Gif sur Yvette Cedex, France


BD diffusons les neutrons




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Directeur-adjoint du LLB

Directeur de Recherche CNRS

Sujets de recherche

Magnétisme basse dimensionnalité
Aimants moléculaires et Photomagnétisme
Couches minces et nano-objets magnétiques
Réflectivité, diffusion aux petits angles des neutrons, diffusion inélastique des neutrons


1993-1997: Thèse de l'Université Joseph-Fourier (Grenoble)
1997-2000: Post-doc à ISIS (Rutherord Appleton Labs, UK)
2000-2003: Post-doc à l'université de Berne (Suisse)
Depuis fin 2003: CNRS au LLB (CEA-CNRS)
2009 : Habilitation à Diriger des Recherches, Université Paris-VI Jussieu. "Contribution de la diffusion des neutrons à l'étude des aimants moléculaires".

2008-2012: membre du comité national du CNRS (ex section 06, maintenant section 03):


Publications scientifiques

New magnetic phase of the chiral skyrmion material Cu2OSeO3, F. Qian, L.J. Bannenberg, H. Wilhelm, G. Chaboussant, L. M. Debeer-Schmitt, M. P. Schmidt, A. Aqeel, T.T.M. Palstra, E.H. Brück, A.J.E. Lefering, C. Pappas, M. Mostovoy, and A. O. Leonov, Science Advances, 4, eaat7323 (2018).

Spin textures induced by quenched disorder in a reentrant spin glass: Vortices versus “frustrated skyrmions”, I. Mirebeau, N. Martin, M. Deutsch, L. J. Bannenberg, C. Pappas, G. Chaboussant, R. Cubitt, C. Decorse, and A. O. Leonov, Phys. Rev. B. 98, 014420 (2018).

Spin waves stiffness in Dzyaloshinskii-Moriya helimagnets Mn1-xFexSi, S. V. Grigoriev, E. V. Altynbaev, S.-A. Siegfried, K. A. Pschenichnyi, D. Menzel, A. Heinemann, and G.Chaboussant, Phys. Rev. B 97, 024409 (2018).

Reorientations, relaxations, metastabilities, and multidomains of skyrmion lattices, L. J. Bannenberg, F. Qian, R. M. Dalgliesh, N. Martin, G. Chaboussant, M. Schmidt, D. L. Schlagel, T. A. Lograsso, H. Wilhelm, and C. Pappas, Phys. Rev. B 96, 184416 (2017).

Long-period helical structures and twist-grain boundary phases induced by chemical substitution in the Mn1−x(Co,Rh)xGe chiral magnet, N. Martin, M. Deutsch, H. Fuchs, G. Chaboussant, F. Damay, P. Bonville, L. N. Fomicheva, A. V. Tsvyashchenko, U.K. Rössler, and I. Mirebeau, Phys. Rev. B 96, 020413(R) (2017).

Probing photo-induced spin states in spin-crossover molecules with neutron scattering, K. Ridier, F. Damay, B. Gillon, G. Chaboussant, T. Fennell, G. A. Craig, M. Murrie, Phys. Rev. B 95, 094403 (2017).

Individual-collective crossover driven by particle size in dense assemblies of superparamagnetic nanoparticles, K. Ridier, B. Gillon, G. Chaboussant, L. Catala, S. Mazérat, E. Rivière, T. Mallah, Eur. Phys. J. B 90: 77 (2017). DOI: 10.1140/epjb/e2017-70534-9

Polarized neutron diffraction to probe local magnetic anisotropy of a low-spin Fe(III) complex, K. Ridier, A. Mondal, C. Boilleau, O. Cador, B. Gillon, G. Chaboussant, B. Le Guennic, K. Kostuas, R. Lescouëzec. Angewandte Chemie Int. Edition 55,  3963 (2016).

Polarized Neutron Diffraction as a tool for mapping the molecular magnetic anisotropy: local susceptibility tensors in Co2+ complexes,K. Ridier, B. Gillon, A. Gukasov, G. Chaboussant, A. Cousson, D. Luneau, A. Borta, J-F. Jacquot, R. Checa, Y. Chiba, H. Sakiyama and M. Mikuriya, Chem. Eur J 22, 724 (2016).

Small-angle neutron scattering study of the short-range organization of dispersed CsNi[Cr(CN)6] nanoparticles, K. Ridier, B. Gillon, G. André, G. Chaboussant, L. Catala, S. Mazérat, T. Mallah. Journal of Applied Physics, 118, 114034 (2015).

Magnetic neutron spectroscopy of a spin−transition Mn3+ molecular complex, K. Ridier, S. Petit, B. Gillon, G. Chaboussant, D.A. Safin, Y. Garcia, Physical Review B 90, 104407 (2014).

10-Terabit-per-Square-Inch Arrays of self-organized monocrystalline 1D nanomagnets,  N. Liakakos, Th. Blon, C. Achkar, V. Vilar, B. Cormary, R. P. Tan,  O. Benamara, G.  Chaboussant, F. Ott, B. Warot-Fonrose, E. Snoeck, B. Chaudret, K. Soulantica et M. Respaud, Nanoletters, 14, 3481 (2014).

Ordered arrays of magnetic nanowires investigated by polarized small−angle neutron scattering, Th. Maurer, S. Gautrot, F. Ott, G. Chaboussant, F. Zighem, L. Cagnon, O. Fruchart, Physical Review B. 89, 188423 (2014).

K. Ait-Atmane, F. Zighem, Y. Soumare, M. Ibrahim, R. Boubekri, T. Maurer, J. Margueritat, J.-Y. Piquemal,  F. Ott, G. Chaboussant, F. Schoenstein, N. Jouini and G. Viau, « High temperature structural and magnetic properties of cobalt and cobalt-nickel nanorods and nanowires », Journal of Solid State Chemistry 197, 297-303 (2013)

G. Chaboussant, S. Désert, P. Lavie and A. Brûlet, “PA20: A new SANS and GISANS project for soft matter, materials and magnetism“, Journal of Physics: Conference Series 340, 012002 (2012).

Th. Maurer, F. Zighem, W. Fang, F. Ott, G. Chaboussant, Y. Soumare, K. Ait-Atmane, J.-Y. Piquemal, and G. Viau, “Dipolar interactions in magnetic nanowire aggregates”, J. Appl. Phys. 110, 123924 (2011)

V. V. Bryk, R. L. Vasilenko, A. V. Goncharov, T. K. Grogorova, A. G. Guglya, V. G. Kolobrodov, M. L. Litvinenko, I. G. Marchenko, E. S. Mel’nikova, I. V. Sassa, Yu. V. Nikitenko, Yu. N. Khaidukov, V. V. Volkov, and G. Chaboussant, « Formation Mechanism, Structure and Adsorption Characteristics of Microporous Nanocrystalline Thin Films (V, Ti)–N–He Composites », Journal of Surface Investigation. Xray, Synchrotron and Neutron Techniques, 5, 566 (2011)

F. Zighem, Th. Maurer, F. Ott et G. Chaboussant, « Dipolar interactions in arrays of ferromagnetic nanowires: a micromagnetic study », Journal of Applied Physics 109, 013910 (2011)

G. Chaboussant "Neutron spectroscopy of isolated magnetic molecules",
Scientific Case for ESS-Bilbao Project (2009).

A.A. Stashkevich, Y. Roussigné, P. Djémia, S.M. Chérif, P.R. Evans, A.P. Murphy, W.R. Hendren, R. Atkinson, R.J. Pollard, A.V. Zayats, G. Chaboussant, F. Ott, "Spin wave modes in Ni nanorod arrays studied by Brillouin light scattering",
Physical Review B 80,  144406 (2009)

T. Maurer, F. Ott, G. Chaboussant, Y. Soumare, J.-Y. Piquemal, G. Viau,
"Coercivity drop in exchange biased Co nanowires induced by AFM fluctuations",
Physical Review B 80, 064427 (2009)

Y. Soumare, C. Garcia, Th. Maurer, G. Chaboussant, F.Ott, F. Fiévet, J-Y. Piquemal, G. Viau
"Kinetically Controlled Synthesis of Hexagonally Close- Packed Cobalt Nanorods with High Magnetic Coercivity"
Advanced Functional Materials 19, (12) 1971 (2009)

F. Cousin, J. Jestin, G. Chaboussant, S. Gautrot et F. Ott,
"Probing Simultaneously the volume and surface structure of nanospheres adsorbed at the liquid-solid interface by GISANS",
European Physics Journal, Special Topics 167, 177183 (2009).

F. Ott , T. Maurer, G. Chaboussant, Y. Soumare, J.-Y. Piquemal et G. Viau,
"Effects of the shape of elongated magnetic particles on the coercive field"
J. Appl. Phys. 105, 013915 (2009).

G. Viau, C. Garcia, T. Maurer, G. Chaboussant, F. Ott, Y. Soumare et J.-Y. Piquemal,
"Highly crystalline Cobalt nanowires with high coercivity prepared by soft chemistry",
Physica status solidi A 206, No. 4, 663 (2009)

A .A. Stashkevich, Y. Roussigné, A.I. Stognij, N.I. Novitskii , G. Wurtz, A. V. Zayats ,  G. Viau, G. Chaboussant, F. Ott , L. V. Lutsev , P. Djemia, M. P. Kostylev, V. Belotelov,
« Magnetic excitations in (SiO2)Co nano-composite Films: Brillouin light scattering study »,
J. Magn. Magn. Mater. 321, 876 (2009).

Y. Soumare, J.-Y. Piquemal, Th. Maurer , F. Ott, G. Chaboussant, A. Falqui et G. Viau,
"Oriented magnetic nanowires with high coercivity",
Journal of Materials Chemistry. 18, 5696.

A .A. Stashkevich, Y. Roussigné, P. Djemia, D. Billet, A. I. Stognij, N. N. Novitskii, G. A. Wurtz, A. V. Zayats, G. Viau, G. Chaboussant,  F. Ott, S. Gautrot, M. P. Kostylev, et L. V. Lutsev,
« BLS Observation of the Transition from the Super-Paramagnetic to the Super-Ferromagnetic State in Nano-Granular (SiO2)Co Films »,
J. Appl. Phys. 104, 093912 (2008).

T. Maurer, T. Maurer, F. Ott, G. Chaboussant, Y. Soumare, J.-Y. Piquemal, G. Viau,
"Magnetic nanowires as permanent magnet materials"
Appl. Phys. Lett. 91 172501 (2007).

R. Bircher, G. Chaboussant, C. Dobe, H.-U. Güdel, S.T. Ochsenbein, A. Sieber and O. Waldmann,
“Single-molecule magnets under pressure”
Advanced Functional Materials, 16, 209 (2006)

R. Bircher, G. Chaboussant, S.T. Ochsenbein, F. Hernandez-Alonso, H.-U. Güdel and E.K. Brechin,
“ Inelastic neutron scattering study of undeuterated [Mn9O7(OAc)11(thme)(py)3(H20)2] ”
Polyhedron, 24, 2455 (2005)

G . Chaboussant
“Nanostructures magnétiques”, Dix moins Neuf (Techniques de l’Ingénieur), vol 2, 21 (2005)

R. Basler, A. Sieber, G. Chaboussant, H.-U. Güdel, N.E. Chakov, M. Soler, G. Christou, A. Desmedt and R. Lechner
“Inelastic Neutron Scattering Study of Electron Reduction in Mn12 derivatives”
Inorganic Chemistry, 44, 649 (2005)

A. Honecker, N. Fukushima, B. Normand, G. Chaboussant and H.-U. Güdel, “Exchange constants and spin dynamics in Mn12-acetate”,
Journal of Magnetism and Magnetic Materials, 290, 966 (2005)

A. Sieber, R. Bircher, O. Waldmann, G. Carver, G. Chaboussant, H. Mutka and H.-U. Güdel
”Effect of pressure on magnetic anisotropy in the single-molecule magnet Mn12-acetate: An inelastic neutron scattering study”
Angewandte Chemie Intl Edition, 44, 4239 (2005)

A. Sieber, C. Boskovic, R. Bircher, O. Waldmann, S.T. Ochsenbein, G. Chaboussant, H.-U. Güdel, N. Kirchner, J. Van Slageren, W. Wernsdorfer, A. Neels, H. Stoeckli-Evans, S. Janssen, F. Juranyi and H. Mutka
“Synthesis and Spectroscopic Characterization of a New Family of Ni4 Spin Clusters”
Inorganic Chemistry, 44, 4315 (2005)

G. Chaboussant, A. Sieber, S.T. Ochsenbein, H.-U. Güdel, M. Murrie, A. Honecker, N. Fukushima and B. Normand, “Exchange Interactions and High-Energy Spin States in Mn12-acetate”
Physical Review B, 70, 104422 (2004)

R. Bircher, G. Chaboussant, A. Sieber, H.-U. Güdel and H. Mutka, “Transverse Magnetic Anisotropy in Mn12-acetate: Direct Determination by Inelastic Neutron Scattering”
Physical Review B, 70, 212413 (2004)

A. Sieber, G. Chaboussant, R. Bircher, C. Boskovic, H.-U. Güdel, G. Christou and H. Mutka, “Pressure Dependence of the Magnetic Anisotropy in the "Single-Molecule Magnet" [Mn4O3Br(OAc)3(dbm)3]”
Physcial Review B, 70, 172413 (2004)

G. Chaboussant, R. Basler, H.-U. Güdel, S. Ochsenbein, A. Parkin, S. Parsons, G. Rajaraman, A. Sieber, A. A. Smith, G. A. Timco and R. E. P. Winpenny
”Nickel pivalate complexes: structural variations and magnetic susceptibility and inelastic neutron scattering studies”
Dalton Transactions 2758-2766 (2004)

G. Chaboussant, S. T. Ochsenbein, A. Sieber, H.-U. Güdel, H. Mutka, A. Müller and B. Barbara, ”Mechanism of ground-state selection in the frustrated molecular spin cluster V15”
Europhysics Letters 66, 423-429 (2004)

C. Boskovic, A. Sieber, G. Chaboussant, H. U. Güdel, J. Ensling, W. Wernsdorfer, A. Neels, G. Labat, H. Stoeckli-Evans and S. Janssen, ”Synthesis and Characterization of a New Family of Bi-, Tri-, Tetra-, and Pentanuclear Ferric Complexes”
Inorganic Chemistry 43, 5053-5068 (2004)

G. Chaboussant, S. T. Ochsenbein, A. Sieber, H.-U. Güdel, B. Barbara, A. Müller and H. Mutka, ”Probing mixing of quantum spin states in frustrated molecular magnets with neutron scattering”
Physica Status Solidi, 12, 3399 (2004)

G. Chaboussant, R. Basler, A. Sieber, S. T. Ochsenbein and H.-U. Güdel, ”Neutron scattering studies of magnetic molecular spin clusters”
Physica B 350, e51-e54 (2004)

S.T. Ochsenbein, G. Chaboussant, A. Sieber, H.-U. Güdel, S. Janssen, A. Furrer and J. P. Attfield, ”Magnetic cluster excitations in the antiferromagnetic phase of a-MnMoO4”
Physical Review B 68, 092410 (2003)

G. Chaboussant, S. T. Ochsenbein, A. Sieber, R. Bircher, H.-U. Güdel, B. Barbara, A. Müller and H. Mutka, ”Magnetic field reveals nature of quntum spin state in the molecular spin cluster V15”
Highlight of the 2003 ILL Annual Report

R. Basler, G. Chaboussant, C. Cañada-Vilalta, G. Christou, H. Mutka, S. Janssen, F. Altorfer and H.-U. Güdel
”Magnetic and inelastic neutron scattering studies of a frustrated tetranuclear Mn3+ butterfly-type cluster”
Polyhedron 22, 2471-2479 (2003)

R. Basler, C. Boskovic, G. Chaboussant, H.-U. Güdel, M. Murrie, S. T. Ochsenbein and A. Sieber, ”Molecular Spin Clusters: New Synthetic Approaches and Neutron Scattering Studies”
Chem. Phys. Chem. 4, 910-926 (2003)

G. Chaboussant, R. Basler, A. Sieber, S.T. Ochsenbein, A. Desmedt, R. E. Lechner, M.F.T. Telling, P. Koegerler, A. Müller and H-U. Güdel, “Low-energy spin excitations in the molecular magnetic cluster V15”
Europhysics Letters 59, 291 (2002).

J. M. Clemente-Juan, E. Coronado, A. Gaita-Ariño, C. Giménez-Saiz, G. Chaboussant, H.-U. Güdel, R. Burriel and H. Mutka, “Magnetism in Polyoxometalates: Anisotropic Exchange Interactions in the CoII3 Moiety of [Co3W(D2O)2(ZnW9O34)2]12-: A Magnetic and Inelastic Neutron Scattering Study”
Chemistry European Journal 8, 5701 (2002).

H. Andres, R. Basler, A. J. Blake, C. Cadiou, G. Chaboussant, C.M. Grant, H-U. Güdel, M. Murrie, S. Parsons, C. Paulsen, F. Semadini, V. Villar, W. Wernsdorfer and R.E.P. Winpenny, “Studies of a Nickel-Based Single Molecule Magnet”
Chemistry European Journal 8, 4867 (2002).

R. Basler, G. Chaboussant, M. Murrie, A. Sieber, H. Andres, P. Kögerler, H. Bögge, D. C. Crans, E. Krickemeier, S. Janssen, H. Mutka, A. Müller and H-U. Güdel, "Inelastic Neutron Scattering on three Mixed-Valence Dodecanuclear Polyoxovanadate Clusters"
Inorganic Chemistry 41, 5675 (2002)

R. Schenker, M. Leuenberger, G. Chaboussant, H-U. Güdel and D. Loss, “Butterfly Hysteresis and Slow Relaxation of the Magnetisation in (Et4N)3Fe2Fe9: Manifestations of a Single-Molecule Magnet.”
Chemical Physics Letters 358, 413 (2002).

R. Schenker, H. Weihe, H. Andres, G. Chaboussant, R. Basler, K. Michelsen, M. Aebersold, H. Büttner, and H-U. Güdel, “Competing Interactions in the Tetranuclear Spin Cluster Ni[(OH)2Cr(bispictn)]3.5H2O. An Inelastic Neutron Scattering and Magnetic Study”
Inorganic Chemistry 41, 4266 (2002).

R. Basler, G. Chaboussant, H. Andres, P. Kögerler, E. Krickemeier, H. Bögge, H. Mutka, A. Müller and H-U. Güdel, "Inelastic Neutron Scattering on a Mixed-Valence Dodecanuclear Polyoxovanadate Clusters"
Applied Physics. A 74 (suppl), S734 (2002).

T.G. Perring, D.T. Adroja, G. Chaboussant, G. Aeppli, T. Kimura and Y. Tokura, “Spectacular doping dependence of interlayer exchange and other results on spin waves in bilayer manganites”
Physical Review Letters 87, 217201-1 (2001).

T.G. Perring, D.T. Adroja, G. Chaboussant, G. Aeppli and T. Kimura, "Spin Waves in the Bilayer Manganite La2-2xSr1+2xMn2O7 , x=0.35"
Journal of Magnetism and Magnetic Materials 226-230, 860 (2001).

G. Chaboussant, T.G. Perring, G. Aeppli, and Y. Tokura, "Spin Waves in the Two-Dimensional Colossal-magnetoresistive Ferromagnet La1.2Sr1.8Mn2O7"
Physica B. 276-278, 801 (2000).

G. Chaboussant, M.-H. Julien, Y. Fagot-Revurat, H. Mayaffre, M. Horvatic, L.P. Lévy, C. Berthier and O. Piovesana, "High-field magnetic phases of a two-leg spin ladder : Cu2(C5H12N2)2Cl4"
Physica B 280, 315 (2000).

C. Berthier, M. Horvatic, Y. Fagot-Revurat, M.-H. Julien, G. Chaboussant, H. Mayaffre, L.P. Lévy and P. Ségransan, "High Magnetic Field Studies of Quantum Spin Chains and Ladders"
Journal of the Physical Society of Japan, 69 (Suppl. B), 54 (2000).

R. Calemczuk, J. Riera, D. Poilblanc, J.-P. Boucher, G. Chaboussant, L.P. Lévy and O. Piovesana, "Thermodynamics Properties of the Spin-1/2 AFM Ladder Cu2(C5H12N2)2Cl4 under magnetic field",
European Physical Journal B7, 171 (1999).

G. Chaboussant, M.-H. Julien, Y. Fagot-Revurat, M.E. Hanson, L.P Lévy, C. Berthier, M. Horvatic and O. Piovesana, "Zero Temperature Phase Transitions in Spin ladders: Phase Diagram and Dynamical Studies of Cu2(C5H12N2)2Cl4",
European Physical Journal B6, 167 (1998)

G. Chaboussant, Y. Fagot-Revurat, M.-H. Julien, M.E. Hanson, C. Berthier, M. Horvatic, L.P. Lévy and O. Piovesana, "NMR study of the S=1/2 Heisenberg Ladder Cu2(C5H12N2)2Cl4: Quantum Phase Transition and Critical Dynamics",
Physical Review Letters 80, 2713 (1998)

G. Chaboussant, M.-H. Julien, Y. Fagot-Revurat, L.P. Lévy, C. Berthier, M. Horvatic and O. Piovesana, "Identification of Nuclear Relaxation Processes in a Gapped Quantum Magnet: 1H NMR in the S=1/2 Heisenberg Ladder Cu2(C5H12N2)2Cl4",
Physical Review Letters 79, 925 (1997).

G. Chaboussant, P.A. Crowell, L.P Lévy, O. Piovesana, A. Madouri and D. Mailly,"Experimental Phase Diagram of Cu2(C5H12N2)2Cl4 : a Quasi-1D Antiferromagnetic Spin-1/2 Heisenberg Ladder",
Physical Review B 55, 3046 (1997)

P. A. Crowell, A. Madouri, M. Specht, G. Chaboussant, D. Mailly and L.P. Lévy, "Torsional Oscillator magnetometer for High Magnetic Fields".
Review of Scientific Instruments, 67, 4161 (1996).

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