US 12,154,602 B2
Magnetic head and magnetic recording device
Yuji Nakagawa, Kawasaki Kanagawa (JP); Masayuki Takagishi, Kunitachi Tokyo (JP); Naoyuki Narita, Funabashi Chiba (JP); and Tomoyuki Maeda, Kawasaki Kanagawa (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION, Tokyo (JP)
Filed on Aug. 1, 2023, as Appl. No. 18/363,613.
Claims priority of application No. 2023-031361 (JP), filed on Mar. 1, 2023.
Prior Publication US 2024/0296864 A1, Sep. 5, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G11B 5/31 (2006.01); G11B 5/027 (2006.01)
CPC G11B 5/3146 (2013.01) [G11B 5/027 (2013.01); G11B 2220/2516 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A magnetic head, comprising:
a first magnetic pole;
a second magnetic pole; and
a magnetic element provided between the first magnetic pole and the second magnetic pole,
the magnetic element including:
a first magnetic layer,
a second magnetic layer provided between the first magnetic layer and the second magnetic pole,
a third magnetic layer provided between the second magnetic layer and the second magnetic pole,
a fourth magnetic layer provided between the third magnetic layer and the second magnetic pole,
a fifth magnetic layer provided between the fourth magnetic layer and the second magnetic pole,
a first non-magnetic layer provided between the first magnetic pole and the first magnetic layer,
a second non-magnetic layer provided between the first magnetic layer and the second magnetic layer,
a third non-magnetic layer provided between the second magnetic layer and the third magnetic layer,
a fourth non-magnetic layer provided between the third magnetic layer and the fourth magnetic layer,
a fifth non-magnetic layer provided between the fourth magnetic layer and the fifth magnetic layer, and
a sixth non-magnetic layer provided between the fifth magnetic layer and the second magnetic pole,
the sixth non-magnetic layer including at least one selected from the group consisting of Cu, Au, Cr, Al, and Ag, wherein
the first non-magnetic layer includes at least one selected from the group consisting of Ru, Ir, Ta, Rh, Pd, Pt and W,
the second non-magnetic layer includes at least one selected from the group consisting of Cu, Au, Cr, Al, and Ag,
the third non-magnetic layer includes at least one selected from the group consisting of Cu, Au, Cr, Al, and Ag,
the fourth non-magnetic layer includes at least one selected from the group consisting of Ru, Ir, Ta, Rh, Pd, Pt and W, and
the fifth non-magnetic layer includes at least one selected from the group consisting of Cu, Au, Cr, Al, and Ag.