Nicolas Martin

Laboratory: Léon Brillouin, UMR12 CEA-CNRS

Phone: 33 1 69 08 97 02
Email: nicolas.martin@cea.fr
Personal website

Nicolas Martin is a CNRS research engineer at the Laboratoire Léon Brillouin (LLB). He studies the effects of chemical and physical constraints on the structure and spin dynamics of magnetic systems hosting topological defects (skyrmions, Bloch points, Weyl fermions, etc.). His privileged experimental technique is small-angle neutron scattering (SANS), which allows observing magnetic textures developing within bulk samples, with characteristic sizes ranging between a few Å up to several hundreds of nm. He is also scientific leader for the design and construction of the future SANS instrument "SAM", which will be installed at the Institut Laue Langevin (ILL, Grenoble), commissioned in spring 2023 and operated by the LLB. Besides conventional SANS experiments, SAM will allow accessing dynamic properties of mesoscopic objects (over time scales spanning a few ps up to tens of ns) thanks to its so-called "neutron resonant spin echo" option.

  • Research topics chiral magnets, reentrant spin glasses, heavy fermions
  • Research areas quantum and topological matter
  • Keywords neutron scattering, magnetic frustration, disordered systems, instrumental development

 

Important publications

Dualism of the 4f electrons and its relation to high-temperature antiferromagnetism in the heavy-fermion compound YbCoC2, D.A. Salamatin, N. Martin, V.A. Sidorov, N.M. Chtchelkatchev, M.V. Magnitskaya, A.E. Petrova, I.P. Zibrov, L.N. Fomicheva, Jing Guo, Cheng Huang, Liling Sun and A.V. Tsvyashchenko, Phys. Rev. B 101, 100406(R) (2020) / doi:10.1103/PhysRevB.101.100406 / arXiv:2003.11601

Partial ordering and phase elasticity in the MnGe short-period helimagnet, N. Martin, I. Mirebeau, C. Franz, G. Chaboussant, L. N. Fomicheva and A. V. Tsvyashchenko, Phys. Rev. B 99, 100402(R) (2019) / doi:10.1103/PhysRevB.99.100402

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) / doi:10.1103/PhysRevB.98.014420 / arXiv:1807.01311

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, 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) / doi:10.1103/PhysRevB.96.020413 /arXiv:1702.06511

Magnetovolume effect, macroscopic hysteresis, and moment collapse in the paramagnetic state of cubic MnGe under pressure, N. Martin, M. Deutsch, J.-P. Itié, J.-P. Rueff, U. K. Rössler, K. Koepernik, L. N. Fomicheva, A. V. Tsvyashchenko and I. Mirebeau, Phys. Rev. B 93, 214404 (2016) / doi:10.1103/PhysRevB.93.21440 / arXiv:1601.05332