Centre National De La Recherche Scientifique

Toyota Jidosha Kabushiki Kaisha

University of Sheffield

Université Joseph Fourier - Grenoble 1

Leibniz Institute for Solid State and Materials Research Dresden

Leibniz-Institut Für Festkörper-Und Werkstoffforschung Dresden E.v.

Metalor Technologies International S.a.

Dominique Givord

Tetsuya Shoji

Akira Kato

Noritsugu Sakuma

Hidefumi Kishimoto

Sophie Rivoirard

Nora Dempsey

Oliver Gutfleisch

Luiz Fernando Zanini

Thomas Schrefl

Thomas George Woodcock

Gino Hrkac

Pierre Ramoni

Frédéric Dumas-Bouchiat

Didier Jeannot

Frederic Dumas-Bouchiat

Thomas Georg Woodcock

Olivier Gutfleisch

Hrkac Gino

Christine Bourda

Laurent Doublet

A method for producing a film including a non-magnetic matrix and a plurality of three-dimensional magnetic microstructures arranged within the matrix according to a predetermined pattern. The method includes providing a master substrate with a magnetically structured face formed from a plurality of magnetic field micro-sources, having a magnetic field gradient of between 10and 10T/m. The method also includes adding magnetic microparticles or nanoparticles to the magnetically structured face of the master substrate, the particles agglomerating into three-dimensional microstructures arranged under an effect of an attractive magnetophoretic force exerted by the magnetic field gradient on the surface of the master substrate. The method further includes depositing, on the magnetically structured face of the master substrate, a matrix made from a non-magnetic material, in such a way as to enclose the arranged microstructures and to form the film and peeling the film from the master substrate.

Method for producing a film comprising three-dimensional magnetic microstructures

A rare earth magnet, which is represented by a neodymium magnet (NdFeB) and neodymium magnet films with applications in micro-systems. A method for producing a rare earth magnet, comprising: (a) quenching a molten metal having a rare earth magnet composition to form quenched flakes of nanocrystalline structure; sintering the quenched flakes; subjecting the sintered body obtained to an orientation treatment; and applying a heat treatment with pressurization at a temperature sufficiently high to enable diffusion or fluidization of a grain boundary phase and at the same time, low enough to prevent coarsening of the crystal grains, (b) thick films deposited on a substrate, applying an annealing to crystallize with pressurization at a temperature sufficiently high to enable diffusion or fluidization of a grain boundary phase and, at the same time, low enough to prevent coarsening of the crystal grains.

Production method of rare earth magnet

Growing community of inventors

Grenoble, France

Dominique Givord