Bernard Barbara - Curriculum Vitae#

  • 2008 - Emeritus Director of Research at CNRS, Grenoble
  • 1993 - Directeur de Recherches 1ere Classe, CNRS, Laboratoire Louis Néel, Grenoble
  • 1982 - Maître de Recherches (Directeur de Recherche 2 eme Classe), CNRS, Lab. Louis Néel, Grenoble.
  • 1980 - 1981 Invited Scientist at IBM Yorktown Heights, NY, USA
  • 1973 - Chargé de Recherches au CNRS, LEPM, Laboratoire Louis Néel, Grenoble.
  • 1972 - State Doctorate (PhD), University of Grenoble, France
  • 1970 - Attaché de Recherches au CNRS, Laboratoire d'Electrostatique et de Physique du Métal (LEPM), Grenoble
  • 1968 - 3rd Cycle Doctorate, University of Grenoble, France
  • 1966 - Physics Diploma (DEA), University of Grenoble, France
  • Former scientific adviser at the CEA, and at the French ministry of science (ANR grants, AERES)
  • Former panel member at the European Research Council for advanced ERC-grants
Salient discoveries and main subjects initiated and developed further are:
  • Discovery of a new type of domain walls and their magnetization process (“narrow domain walls”, 1970)
  • Intrinsic pinning of arrow domain walls (1970-1973)
  • Discovery of the 1/H relaxation law of high anisotropy systems (combining wall-nucleation and pinning)
  • Experimental evidence for a first order transition in the 3d-3q Pott’s model (1975)
  • First studies of the competition between magnetic-order/Kondo-effect, precursor of “heavy fermions” (1975)
  • Evidence and nature of the phase transition of spin-glasses (divergence, scaling of the non-linear X (1981).
  • Significant works on random anisotropy magnets, weak-localisation…(1985)
  • ntroduction of micro-SQUID sensors in magnetism, first single nano-particles measurements.
  • Unique studies of single nano-particle and first demonstration of the bases of nano-magnetism (1993-1996, awaited for more than 50 years)
  • Isolated search and studies of the phenomenon of “quantum tunnelling at the macroscopic scale” in magnetism (more recently called “mesoscopic scale”) (domain walls, films, nanoparticles) (1970-1990).
  • Evidence for the phenomenon of mesoscopic quantum tunneling of the magnetization in Mn12-ac, emergence of the new field of quantum spin relaxation (1996), see e.g. K. Ziemelis, Nature, Milestones on Spin, S19, 2008.
  • Extension of this field to single paramagnetic rare-earth ions; nuclear spins driven tunnelling of the total angular momentum of rare-earths and of the macroscopic dynamics (2001 ).
  • Pulsed EPR measurements showing the crossover between quantum relaxation (strong decoherence) and quantum coherence (weak decoherence) in rare-earth ions and in the low-spin SMM V15 (2006-2008).
  • Quantitative study of decoherence of Rabi oscillations. Study of decoherence etc
  • Classical Landau-Zener model (2012)

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