US 12,462,834 B2
Magnetic head and magnetic recording device
Satoshi Shirotori, Yokohama Kanagawa (JP); Tazumi Nagasawa, Yokohama Kanagawa (JP); Yoshihiro Higashi, Komatsu Ishikawa (JP); and Akira Kikitsu, Yokohama Kanagawa (JP)
Assigned to Kabushiki Kaisha Toshiba, Kawasaki (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Jan. 18, 2024, as Appl. No. 18/416,106.
Claims priority of application No. 2023-123419 (JP), filed on Jul. 28, 2023.
Prior Publication US 2025/0037737 A1, Jan. 30, 2025
Int. Cl. G11B 5/31 (2006.01)
CPC G11B 5/315 (2013.01) 21 Claims
OG exemplary drawing
 
1. A magnetic head, comprising:
a reproducing section, the reproducing section including:
a first shield;
a second shield;
a third shield;
a fourth shield, a second direction from the third shield to the fourth shield crossing a first direction from the first shield to the second shield;
a first magnetic layer provided between the first shield and the second shield and between the third shield and the fourth shield;
a first intermediate layer provided between the first shield and the first magnetic layer, the first intermediate layer being nonmagnetic; and
a second intermediate layer provided between the first magnetic layer and the second shield, the second intermediate layer being nonmagnetic,
a second intermediate layer length of the second intermediate layer along the second direction being shorter than a first intermediate layer length of the first intermediate layer along the second direction,
wherein the reproducing section further includes
a third intermediate layer provided between the third shield and the first magnetic layer, the third intermediate layer being nonmagnetic, and
a fourth intermediate layer provided between the first magnetic layer and the fourth shield, the fourth intermediate layer being nonmagnetic,
a third intermediate layer length of the third intermediate layer along the first direction is shorter than a first magnetic layer thickness of the first magnetic layer along the first direction, and
a fourth intermediate layer length of the fourth intermediate layer along the first direction is shorter than the first magnetic layer thickness.