US 12,033,676 B2
Magnetic head and magnetic recording device
Yuji Nakagawa, Kawasaki (JP); Naoyuki Narita, Funabashi (JP); Masayuki Takagishi, Kunitachi (JP); Tomoyuki Maeda, Kawasaki (JP); Tazumi Nagasawa, Yokohama (JP); and Hirofumi Suto, Ota (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 Nov. 1, 2022, as Appl. No. 17/978,516.
Application 17/978,516 is a division of application No. 17/397,226, filed on Aug. 9, 2021, granted, now 11,521,644.
Claims priority of application No. 2021-028528 (JP), filed on Feb. 25, 2021.
Prior Publication US 2023/0046928 A1, Feb. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G11B 5/00 (2006.01); G11B 5/127 (2006.01); G11B 5/31 (2006.01)
CPC G11B 5/3146 (2013.01) [G11B 5/1278 (2013.01); G11B 2005/0005 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetic head comprising:
a first magnetic pole;
a second magnetic pole; and
a stacked body provided between the first magnetic pole and the second magnetic pole,
the stacked body including
a first magnetic layer,
a second magnetic layer provided between the second magnetic pole and the first magnetic layer,
a third magnetic layer provided between the second magnetic pole and the second magnetic layer,
a fourth magnetic layer provided between the second magnetic pole and the third magnetic layer,
a first non-magnetic layer provided between the first magnetic layer and the first magnetic pole,
a second non-magnetic layer provided between the second magnetic layer and the first magnetic layer,
a third non-magnetic layer provided between the third magnetic layer and the second magnetic layer,
a fourth non-magnetic layer provided between the fourth magnetic layer and the third magnetic layer, and
a fifth non-magnetic layer provided between the second magnetic pole and the fourth magnetic layer.