NMR in ferromagnets

RESEARCH TOPICS

• Structure and interfaces of metallic multilayers and spin valves for magneto-electronics. Developed 90-95, now routine characterisation work (internal & external)
• Chemical short range order, metastable phases in thin film alloys and their magnetic properties. Continued interest
• Nanocomposites, granular metals in metal and oxide matrices. Continued interest
• Magnetic metal / oxide interfaces and exchange coupling. Growing interest

INSTRUMENT

• Broadband 20-750 MHz spectrometer designed for the study of magnetic systems
• Operating temperature 1.5-4.2 K, 77 K-300 K
• Zero field and DC Field operation (0 – 7 kOe) (studies of the magnetization process)
• High sensitivity : 1 atomic layer achievable

SKETCH OF THE METHOD

As a probe of the short range chemical and topological order, NMR can evidence bulk structural defects and evaluate concentration profiles, densities of defects at interfaces in magnetic multilayers or granular system. As NMR yields an insight of the structure in the real space it complements nicely standard diffraction techniques. Beside such structural investigations a large emphasis is presently given to the study of the correlation between the nanostructure of composite systems and their local magnetic properties. The hyperfine field is the first output of an NMR experiment in ferromagnets, which gives a direct insight on the local magnetization. Hence, for example, one can estimate the magnetization profile at a diffuse interface between a magnetic and a non-magnetic layer. Moreover, NMR can measure the restoring torque exerted on the electronic moments by the magnetic anisotropy or the exchange coupling. This torque is quantitatively measured and expressed as a restoring field, which is a measure of the anisotropy field, or domain wall propagation field, or exchange coupling field according to the mechanism that determines the magnetization process. The magnetic measurement is done at selected frequencies, i.e. on selected parts of a composite sample. Therefore NMR is a unique tool to investigate, at a local scale, the different magnetic properties of the different components in a sample. With this local magnetometry one can evidence and measure, for example, the different magnetic anisotropy in pure clusters and in alloyed regions of supersaturated bimetallic, or the different initial magnetic susceptibility at interfaces and in the bulk of multilayers.

Selected Publications

NMR in ferromagnets methods

1 – C. MENY
Nuclear magnetic resonance investigations of the structure and magnetic properties of metallic multilayers and nanocomposites
Proc. of SPIE 7995 7995R1-5 (2011)

2 – C. MENY, P. PANISSOD
Nuclear Magnetic Resonance in Ferromagnetic Multilayers and Nanocomposites: Investigations of Their Structural and Magnetic Properties
In Modern Magnetic Resonance Part III, 1493, G. Webb, Ed., Springer, Heidelberg, (2008)

3 – P. PANISSOD, C. MENY
Nuclear Magnetic Resonance investigations of the structure and magnetic properties of metallic multilayers and nanocomposites
Appl. Magn. Reson. 19, 447-460 (2000)

4 – P. PANISSOD, C. MENY, M. WOJCIK, E. JEDRYKA
Magnetic properties and structure of metallic multilayers investigated by NMR
Materials Research Society Spring Meeting, San Francisco, USA, 30 Mars – 4 Avril 1997
Mater. Res. Soc. Symp. Proc. 475, 157-168 (1997)

5 – PANISSOD, C. MENY, M. WOJCIK, E. JEDRYKA
NMR studies of local magnetic properties in Co based multilayers
Condensed Matter Studies by Nuclear Methods, edited by E. A. Görlich and K. Latzka
(Éditions de l’Université, Cracovie), 89-102 (1997).

6 – PANISSOD, J.P. JAY, C. MENY, M. WOJCIK, E. JEDRYKA
NMR analysis of buried metallic interfaces
10^th International Conference on Hyperfine Interactions, Louvain, Belgique, 28 Août-1 Septembre 1995
Hyperfine Interact. 97-98, 75-98 (1996)

7 – P. PANISSOD, C. MENY, J.P. JAY, M. WOJCIK, E. JEDRYKA
Structure des multicouches métalliques et de leurs interfaces vues par RMN
39^ème Colloque de Métallurgie, Saclay, 25-27 Juin 1996
J. Phys. IV (Paris) Suppl. Coll. 7 6, C7_89-106 (1996)

8 – P. PANISSOD, J.P. JAY, C. MENY, M. WOJCIK, E. JEDRYKA
NMR studies of bulk and interface structure in Co based multilayers
Symposium on Magnetic Ultrathin Films, Multilayers and Surfaces, San Francisco, USA, 17-20 Avril 1995
Mater. Res. Soc. Symp. Proc. 384, 61-72 (1995)

9 – P. PANISSOD, C. MENY
NMR investigation of the nanostructure of …/Cu/Co/Cu… layers
J. Magn. Magn. Mater.126, 16-18 (1993)

NMR in ferromagnets contributions

10 – Y.F. LIU, B. DE TYMOWSKI, F. VIGNERON, I FLOREA, O. ERSEN, C. MENY, P. NGUYEN, C. PHAM, F. LUCK, C. PHAM−HUU
Titania−Decorated Silicon Carbide−Containing Cobalt Catalyst for Fischer−Tropsch Synthesis
ACS Catalysis 3 393−404 (2013)

11- B. DE TYMOWSKI,Y. LIU, C. MENY, C. LEFÈVRE, D. BEGIN,P. NGUYEN, C. PHAM, D. EDOUARD, F. LUCK, C. PHAM-HUU
Co–Ru/SiC impregnated with ethanol as an effective catalyst for the Fischer–Tropsch synthesis
Appl. Catalysis A. 418-420, 31 (2012)

12 – M.-H. HU, K. LE GUEN, J.-M. ANDRÉ, S.K. ZHOU, H.C. LI, J.T. ZHU, Z.S. WANG, C. MENY, N. MAHNE, A. GIGLIA, S. NANNARONE, I. ESTÈVE, M. WALLS, P. JONNARD
Investigation of the thermal stability of Mg/Co periodic multilayers for EUV applications
Appl. Phys. A106, 737 (2012)

13 – K. LE GUEN, M.-H. HU, J.-M. ANDRÉ, S. K. ZHOU, H. CH. LI, J. T. ZHU, Z. S. WANG, C. MENY, A. GALTAYRIES, P. JONNARD
Observation of an asymmetrical effect when introducing Zr in Mg/Co multilayers
Appl. Phys. Let.   98, 251909 (2011)

14 – K. LE GUEN, M.H. HU, J.M. ANDRE, P JONNARD, P.S.K. ZHOU, H. LI, , J.T. ZHU, Z.S. WANG, C. MENY
Development and characterization of Co/Mg periodic multilayers for EUV applications
J. Phys. Chem. C, 114, 6484–6490 (2010)

15 – N. YAACOUB, C. MENY, C. ULHAQ-BOUILLET, M. ACOSTA, P. PANISSOD
Short period magnetic coupling oscillations in Co/Si multilayers: on the role of crystallization and interface quality
Phys. Rev.B, 75, 174402,( 2007)

16 – N. YAACOUB, C. MENY, O. BENGONE, P. PANISSOD
Short period magnetic coupling oscillations in Co/Si multilayers: theory versus experiment
Phys. Rev. Lett. 97, 257206 (2006)

17 – M. VÉLEZ, C. MENY, S.M. VALVIDARES, J. DIAZ, R. MORALES, L.M. ALVAREZ-PRADO, P. PANISSOD, J.M. ALAMEDA
Amorphous to polycrystalline transition in Co_xSi_1-x alloy thin films
Eur. Phys. J. B 41, 517-524 (2004)

18 – S. COLIS, G. POURROY, P. PANISSOD, C. MENY, AND A. DINIA
Correlation between magnetic properties and nuclear magnetic resonance observations in Sr₂FeMoO₆ double perovskite
J. Magn. Magn. Mater. 272, 2018-2020 (2004)

19 – S. COLIS, A. DINIA, C. ULHAQ-BOUILLET, P. PANISSOD, C. MENY, G. SCHMERBER, AND J. ARABSKI
Magnetic, transport and structural properties of Co/Ir multilayers grown by molecular beam epitaxy
Phys. Stat. Sol. A 199, 161 (2003)

20 – G. POURROY, A. VALLES-MINGUEZ, I.S. JURCA, C. MENY, P. PANISSOD
Synthesis and properties of Fe⁰-Co⁰/Co-magnetite composites under hydrothermal conditions
J. Alloys Comp. 333, 296-301 (2002)

21 – M. DEMAND, M. HEHN, R.L. STAMPS, C. MENY, K. OUNADJELA
Structure and magnetic properties of epitaxial cobalt islands
Eur. Phys. J. B 25, 167-176 (2002)

22 – J.P. JAY, I.S. JURCA, G. POURROY, N. VIART, C. MENY, P. PANISSOD
⁵⁹Co NMR study in Fe-Co alloys/Co magnetite composites
Solid State Sciences 3, 301-308 (2001)

23 – J. P. DEVILLE, A. BARBIER, C. MOCUTA, G. RENAUD, Y. SAMSON, H. MAGNAN, P. LE FÈVRE, D. CHANDERIS, P. PANISSOD, C. MENY
Magnetic ultrathin films and multilayers : growth and charactérization
Analusis 28 N°2, 118-125 (2000)

24 – E. DUJARDIN, C. MENY, P. PANISSOD, J.P. KINTZINGER, N. YAO, T.W. EBBESEN
Interstitial metallic residues in purified single shell carbon nanotubes
Solid State Comm. 114, 543-546 (2000)

25 – F. BENSMINA, A. DINIA, C. MENY, P. PANISSOD, D. MULLER
Annealing effect on structural and magnetic properties of Ta/Cu/FeMn/Co/FeMn thin film structures
Eur. Phys. J. AP, 11, 97-101 (2000)

26 – J.L. BUBENDORFF, C. MENY, E. BEAUREPAIRE, P. PANISSOD, J.P. BUCHER
Electrodeposited Co films : hcp versus fcc nanostructuring and magnetic properties
Eur. Phys. J. B 17, 635-643 (2000)

27 – S. COLIS , A. DINIA, C. MENY, P. PANISSOD, C. ULHAQ-BOUILLET, G. SCHMERBER
Magnetic, transport, and structural properties of Fe/Co/Cu/[Co/Ir/Co] sandwiches and Fe/Co/Cu/[Co/Ir] multilayers prepared by ion-beam sputtering
Phys. Rev. B 62, 11709-11718 (2000)

28 – C. TIUSAN, M. HEHN, K. OUNADJELA, Y. HENRY, J. HOMMET, C. MENY, H. VAN DEN BERG, L. BAER, R. KINDER
Artificial antiferromagnetic tunnel junction sensors based on Co/Ru/Co sandwiches
J. Appl. Phys. 85, 5276-5278 (1999)

29 – M. MALINOWSKA, M. WOJCIK, S. NADOLSKI, E. JEDRYKA, C. MENY, P. PANISSOD, M. KNOBELL, A. D. C. VIEGAS, J. E. SCHMIDT
Identification of magnetic phases in granular Co₁₀Cu₉₀ alloy using ⁵⁹Co NMR method
J. Magn. Magn. Mater. 198-199, 599-601 (1999)

30 – J.L. BUBENDORFF, E. BEAUREPAIRE, C. MÉNY, J.P. BUCHER
Overpotential driven perpendicular magnetization of electrodeposited ultrathin cobalt films
J. Appl. Phys. 83, 7043-7045 (1998)

31 – H. EL FANITY, K. RAHMOUNI, M. BOUANANI, A. DINIA, G. SCHMERBER, C. MENY, P. PANISSOD, A. CZIRAKI, F. CHERKAOUI, A. BERRADA
Structural properties of electrodeposited Co/Cu multilayers
Thin Solid Films 318, 227-230 (1998)

32 – S. ZOLL, A. DINIA, J.P. JAY, C. MENY, G. Z. PAN, A. MICHEL, L. EL CHAHAL, V. PIERRON-BOHNES, P. PANISSOD, H. A. M. VAN DEN BERG
Influence of the growth technique on the coupling and magnetoresistance of Co/Ru sandwiches
Phys. Rev. B 57, 4842-4848 (1998)

33 – M. MALINOWSKA, C. MENY, E. JEDRYKA, P. PANISSOD
The anisotropic first-neighbour contribution to the hyperfine field in hexagonal-close-packed Co : A nuclear magnetic resonance study of diluted alloys and multilayers
J. Phys.: Condens. Matter. 10, 4919-4928 (1998)

34 – J.L. BUBENDORFF, E. BEAUREPAIRE, C. MENY, P. PANISSOD, J.P. BUCHER
Perpendicular magnetization in ultrathin electrodeposited cobalt films
Phys. Rev. B 56, R7120-R7123 (1997)

35 – N. PERSAT, A. DINIA, J.P. JAY, C. MENY, P. PANISSOD
Structural properties and oscillatory magnetoresistance of Co(hcp)/Cu sandwiches
J. Magn. Magn. Mater. 164, 37-42 (1996)

36 – N. PERSAT, A. DINIA, J.P. JAY, C. MENY, P. PANISSOD
Structure and oscillatory magnetoresistance of Co(hcp)/Cu sandwiches
Thin Solid Films 275, 115-118 (1996)

37 – C. MENY, E. JEDRYCKA, P. PANISSOD
Satellite structure of Co NMR spectra in some Co alloys
J. Phys. : Condens. Matter 5 1547-1556 (1993)

38 – J. DEKOSTER, E. JEDRYKA, C. MENY, G. LANGOUCHE
Epilayer induced structural transition to bcc Co during epitaxial growth of Co/Fe superlattices
Europh. Lett. 22,433-438 (1993)

39 – Y. HENRY, C. MENY, A. DINIA, P. PANISSOD
Structural and magnetic properties of semiepitaxial Co/Cr multilayers
Phys. Rev. B 47 15037-15045 (1993)

40 – C. MENY, P. PANISSOD, P. HUMBERT, J.P. NOZIÈRES, V.S. SPERIOSU, B.A. GURNEY, R. ZEHRINGER
Structural study of Cu/Co/NiFe/FeMn spin valves by nuclear magnetic resonance
J. Magn. Magn. Mater. 121, 406-408 (1993)

41 – C. MENY, J.P. JAY, P. PANISSOD, P. HUMBERT, V.S. SPERIOSU, H. LEFAKIS, J.P. NOZIÈRES, B.A. GURNEY
Annealed Cu/Co/Cu/NiFe/FeMn spin valves : nanostructure and magnetism
Mat. Res. Soc. Symp. Proc. 313, 289 (1993)

42 – J. DEKOSTER, E. JEDRYKA, C. MENY, G. LANGOUCHE
Epitaxial growth of bcc Co/Fe superlattices
J. Magn. Magn. Mater. 121, 69-72 (1993)

43 – C. MENY, P. PANISSOD, R. LOLOEE
Structural study of cobalt-copper multilayers by NMR
Phys. Rev. B 45, 12269-12277 (1992)

Contact :