Permanent magnet comprising an antiferromagnetic layer and a ferromagnetic layer
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsRachid HIDA, Bertrand DELAET, Sophie GIROUD
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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.
Claims13
A permanent magnet comprising:
- an antiferromagnetic layer,
- a ferromagnetic layer having a magnetization direction set by exchange coupling to the antiferromagnetic layer, the ferromagnetic layer comprising:
- a first sublayer making contact with the antiferromagnetic layer or solely separated from the antiferromagnetic layer by an intermediate ferromagnetic sublayer the thickness of which is smaller than 2 nm, the thickness of this first sublayer being larger than 2 nm, this first sublayer being made of a first type of ferromagnetic material, the first type of ferromagnetic material being an alloy of iron and cobalt that is at least partially crystallized, and
- a second sublayer separated from the antiferromagnetic layer by the first sublayer, the thickness of this second sublayer being larger than 2 nm, this second sublayer being made of a second type of ferromagnetic material,
- wherein the second type of ferromagnetic material is also an alloy of iron and cobalt in which a proportion of face-centered cubic crystals is lower than a proportion of face-centered cubic crystals in the first type of ferromagnetic material.
Dependencies are inferred from the claim text.