Paramagnetic hexagonal metal phase coupling spacer

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United States of America Patent

PATENT NO 12108686
APP PUB NO 20230189658A1
SERIAL NO

17550464

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Abstract

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A top pinned SAF-containing magnetic tunnel junction structure is provided that contains a coupling spacer composed of a paramagnetic hexagonal metal phase material that has a stoichiometric ratio of Me3X or Me2X, wherein Me is a magnetic metal having a magnetic moment and X is a metal that alloys with Me in a hexagonal phase and dilutes the magnetic moment of Me. In embodiments in which a Me3X coupling spacer is present, Me is cobalt, and X is vanadium, niobium, tantalum, molybdenum or tungsten. In embodiments in which a Me2X coupling spacer is present, Me is iron and X is tantalum or tungsten. The coupling spacer is formed by providing a material stack including at least a precursor paramagnetic hexagonal metal phase material forming multilayered structure that includes alternating layers of magnetic metal, Me, and metal, X, and then thermally soaking the material stack.

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Patent Owner(s)

Patent OwnerAddress
INTERNATIONAL BUSINESS MACHINES CORPORATIONOLD ORCHARD ROAD ARMONK N Y 10504

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brown, Stephen L Carmel, US 46 399
Gottwald, Matthias Georg New Rochelle, US 32 248
Reznicek, Alexander Troy, US 1451 12717

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