公开(公告)号：US20200265984A1

公开(公告)日：2020-08-20

申请号：US16762004

申请日：2018-09-25

Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

Inventor： Rachid HIDA ,  Bertrand DELAET ,  Sophie GIROUD

IPC: H01F10/32 ,  H01F7/02 ,  H01F41/30 ,  G01R33/028

Abstract: A permanent magnet comprising an antiferromagnetic layer and a ferromagnetic layer having a first sub-layer made of a first type of ferromagnetic material, the first type of ferromagnetic material being an at least partially crystallized alloy of iron and cobalt, and a second sub-layer made of a second type of ferromagnetic material, this second type of ferromagnetic material also being an alloy of iron and cobalt in which the proportion of face-centered cubic crystals is less than the proportion of face-centered cubic crystals in the first type of ferromagnetic material.

公开(公告)号：US20180025840A1

公开(公告)日：2018-01-25

申请号：US15654115

申请日：2017-07-19

Applicant: Commissariat a l'energie atomique et aux energies alternatives

Inventor： Bertrand DELAET ,  Sophie GIROUD ,  Rachid HIDA

IPC: H01F41/02 ,  H01F41/30 ,  H01F1/00 ,  H01F7/02 ,  G01R33/028 ,  H01F10/32

CPC classification number: H01F41/0253 ,  G01R33/0052 ,  G01R33/0286 ,  G01R33/038 ,  H01F1/0009 ,  H01F7/021 ,  H01F10/30 ,  H01F10/3218 ,  H01F10/3272 ,  H01F41/30 ,  H01F41/304

Abstract: A permanent magnet including, at least once per group of ten consecutive ferromagnetic layers, a growth layer directly interposed between a top antiferromagnetic layer of a previous pattern and a bottom antiferromagnetic layer of a following pattern. This growth layer is entirely realized in a nonmagnetic material chosen from the group made up of the following metals: Ta, Cu, Ru, V, Mo, Hf, Mg, NiCr and NiFeCr, or it is realized by a stack of several sublayers of nonmagnetic material disposed immediately on one another, at least one of these sublayers being entirely realized in a material chosen from the group. The thickness of the growth layer is greater than 0.5 nm.