Abstract: According to one embodiment, a magnetic sensor includes a detection section including first to fourth shields, a first magnetic member, first to fourth conductive members being non-magnetic. A second direction from the third shield to the fourth shield crosses a first direction from the first shield to the second shield. The first magnetic member is provided between the first shield and the second shield and between the third shield and the fourth shield. The first to fourth conductive members, satisfy one of first to fourth conditions regarding first to third materials. The first material includes at least one selected from the group consisting of Nb, Mo, Tc, Ta, W, and Re. The second material includes at least one selected from the group consisting of Ru, Rh, Pd, Os, Ir, and Pt. The third material includes at least one selected from the group consisting of Cu, Al, Tb, and Cr.

Abstract: According to one embodiment, a magnetic sensor includes a detection section including first to fourth shields, a first magnetic member, first to fourth conductive members being non-magnetic. A second direction from the third shield to the fourth shield crosses a first direction from the first shield to the second shield. The first magnetic member is provided between the first shield and the second shield and between the third shield and the fourth shield. The first to fourth conductive members, satisfy one of first to fourth conditions regarding first to third materials. The first material includes at least one selected from the group consisting of Nb, Mo, Tc, Ta, W, and Re. The second material includes at least one selected from the group consisting of Ru, Rh, Pd, Os, Ir, and Pt. The third material includes at least one selected from the group consisting of Cu, Al, Tb, and Cr.

Abstract: According to one embodiment, a magnetic sensor includes a detection section including first to fourth shields, a first magnetic member, and first to fourth conductive members. A second direction from the third shield to the fourth shield crosses a first direction from the first shield to the second shield. The first magnetic member is provided between the first shield and the second shield and between the third shield and the fourth shield. The first to forth conductive members are each provided between the first to forth shields and the first magnetic member, and are non-magnetic. A least one of the first to fourth conductive members includes at least one of a first material or a second material. The first material includes at least one selected from the group consisting of ?-Ta, ?-Mo, and ?-W. The second material includes Bi.

Abstract: According to one embodiment, a magnetic recording device includes a magnetic head and a controller. The magnetic head includes a first magnetic pole, a second magnetic pole, a magnetic element provided between the first magnetic pole and the second magnetic pole, a first terminal, a second terminal, and a coil. In the first operation, the controller is configured to supply a recording coil current to the coil while supplying a recording element current to the magnetic element. An absolute value of the recording coil current is equal to or less than the first coil current value.

Abstract: According to one embodiment, a magnetic recording device includes a magnetic head, and a controller. The magnetic head including a first magnetic pole, a second magnetic pole, a magnetic element provided between the first magnetic pole and the second magnetic pole, a coil, a first terminal, and a second terminal. In the first operation, the controller is configured to supply a recording coil current to the coil while supplying a recording element current to the magnetic element. An absolute value of the recording coil current is equal to or greater than the coil current value. The recording element current is equal to or less than the first current value.

Abstract: According to one embodiment, a magnetic recording device includes a magnetic head, and a controller. The magnetic head including a first magnetic pole, a second magnetic pole, a magnetic element provided between the first magnetic pole and the second magnetic pole, a coil, a first terminal, and a second terminal. The controller is configured to switch between a first operation and a second operation. In the first operation, the controller is configured to supply a first recording coil current to the coil while supplying a first recording element current to the magnetic element. In the second operation, the controller is configured to supply a second recording coil current to the coil while supplying a second recording element current to the magnetic element.

Abstract: According to one embodiment, a magnetic head includes a first magnetic pole including a medium facing face and a first face crossing the medium facing face, a second magnetic pole including a second face, and a magnetic element. The first face faces the second face in a first direction. The magnetic element includes first and second magnetic layers. The first face includes first and second portions. A second direction crosses the medium facing face and the first direction. The first and second portions satisfy one of first and second conditions. In the first condition, a first portion position of the first portion is between a medium facing face position of the medium facing face and a second portion position of the second portion in the second direction. In the second condition, the second portion position is between the medium facing face position and the first portion position.

Abstract: According to one embodiment, a magnetic head includes a reproducing section including a medium facing face. The reproducing section includes a first magnetic element including a first magnetic layer, a second magnetic layer, and a third magnetic layer. The first magnetic layer is provided between the third magnetic layer and the second magnetic layer in a first direction along the medium facing face. A first magnetic layer magnetization of the first magnetic layer includes a first component along a second direction crossing the medium facing face. A second magnetic layer magnetization of the second magnetic layer includes a second component along the second direction. A direction of the second component is opposite to a direction of the first component. A third magnetic layer magnetization of the third magnetic layer includes a third component along a third direction crossing a plane including the first direction and the second direction.