Patent ID: 11944018
Assignee: TDK CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A magnetoresistance effect element comprising a first Ru alloy layer, a first ferromagnetic layer, a non-magnetic metal layer, and a second ferromagnetic layer in order,
wherein the first Ru alloy layer contains one or more Ru alloys represented by the following general formula (1),

RuαX1-α  (1)

where, in the general formula (1), the symbol X represents one or more elements selected from the group consisting of Be, B, Ti, Y, Zr, Nb, Mo, Rh, In, Sn, La, Ce, Nd, Sm, Gd, Dy, Er, Ta, W, Re, Os, and Ir, and the symbol α represents a number satisfying 0.5<α<1,
the first ferromagnetic layer contains a Heusler alloy, and
the second ferromagnetic layer contains a Heusler alloy.