Magnetic head and magnetic recording and reproducing device

• US 10,186,284 B2
• Filed: 09/13/2017
• Issued: 01/22/2019
• Est. Priority Date: 03/08/2017
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Narita, Naoyuki, Iwasaki, Hitoshi, Shimizu, Mariko, Koui, Katsuhiko, Yamada, Kenichiro
• Primary Examiner(s): Klimowicz, William J
• Application Number:
  US15/703,089
• Publication Number:
  US 20180261241A1
• Time in Patent Office: 496 Days
• Field of Search: None
• CPC Class Codes: G11B 5/187 Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features G11B5/265, G11B5/29 , G11B5/31 take precedence
• CPC Class Codes: G11B 5/3116 Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks G11B5/3113, G11B5/245 take precedence
• CPC Class Codes: G11B 5/312 for reducing flux leakage between the electrical coil layers and the magnetic cores or poles or between the magnetic cores or poles
• CPC Class Codes: G11B 5/315 Shield layers on both sides of the main pole, e.g. in perpendicular magnetic heads
• CPC Class Codes: G11B 5/4813 Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm G11B5/484 takes precedence
• CPC Class Codes: G11B 5/4826 Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive G11B5/484 takes precedence; details of head housings or structures G11B5/10, G11B5/127; adjustment relative to the record carrier G11B5/56
• CPC Class Codes: G11B 5/66 the record carriers consisting of several layers

Abstract

According to one embodiment, a magnetic head includes a magnetic pole, and a first shield, and a stacked body provided between the magnetic pole and the first shield. The stacked body includes a first layer, a second layer and a third layer. The first layer includes at least one first element selected from the group consisting of Fe, Co, and Ni. The second layer is provided between the magnetic pole and the first layer, and includes at least one second element selected from the group consisting of Cr, V, Mn, Ti, and Sc. The third layer is provided between the first layer and the first shield, and includes at least one third element selected from the group consisting of Cr, V, Mn, Ti, and Sc.

Claims

1. A magnetic head, comprising:

a magnetic pole;

a first shield; and

a stacked body provided between the magnetic pole and the first shield,

the stacked body including

a first layer including at least one first element selected from the group consisting of Fe, Co, and Ni,

a second layer provided between the magnetic pole and the first layer, the second layer including at least one second element selected from the group consisting of Cr, V, Mn, Ti, and Sc, and

a third layer provided between the first layer and the first shield, the third layer including at least one third element selected from the group consisting of Cr, V, Mn, Ti, and Sc,

wherein

the stacked body further includes a fourth layer including a metal, and a fifth layer including a metal,

the fourth layer is provided between the first layer and the second layer,

the third layer is provided between the first layer and the fifth layer,

the second layer contacts the magnetic pole, and

the third layer contacts the first layer.

2. The head according to claim 1, wherein

the fourth layer contacts the first layer and the second layer, and

the fifth layer contacts the third layer and the first shield.

3. The head according to claim 1, further comprising an interconnect configured to supply a current to the stacked body, the current having an orientation from the third layer toward the second layer.

4. The head according to claim 1, wherein

the fourth layer includes at least one selected from the group consisting of Cu, Ag, and Au, and

the fifth layer includes at least one selected from the group consisting of Cu, Ag, and Au.

5. The head according to claim 1, wherein

a fourth thickness of the fourth layer along a direction from the second layer toward the third layer is not less than 0.5 nanometers and not more than 10 nanometers, and

a fifth thickness of the fifth layer along the direction from the second layer toward the third layer is not less than 0.5 nanometers and not more than 10 nanometers.

6. A magnetic recording and reproducing device, comprising:

the magnetic head according to claim 1;

a magnetic recording medium where information is recorded by the magnetic head; and

a first electrical circuit configured to supply a current to the stacked body, the current having an orientation from the third layer toward the second layer.

7. The device according to claim 6, further comprising a second electrical circuit,

the magnetic head further including a coil,

at least a portion of the coil being positioned between the magnetic pole and the first shield,

the second electrical circuit being configured to supply a current to the coil, the current corresponding to the information.

8. A magnetic head, comprising:

a magnetic pole;

a first shield; and

a stacked body provided between the magnetic pole and the first shield,

the stacked body including

a first layer including at least one first element selected from the group consisting of Fe, Co, and Ni,

a second layer provided between the magnetic pole and the first layer, the second layer including at least one second element selected from the group consisting of Cr, V, Mn, Ti, and Sc, and

a third layer provided between the first layer and the first shield, the third layer including at least one third element selected from the group consisting of Cr, V, Mn, Ti, and Sc,

wherein

the stacked body further includes a fourth layer including a metal, and a fifth layer including a metal,

the second layer is provided between the first layer and the fourth layer, and

the fifth layer is provided between the first layer and the third layer.

9. The head according to claim 8, wherein

the second layer contacts the fourth layer and the first layer, and

the fifth layer contacts the first layer and the third layer.

10. The head according to claim 8, wherein

the fourth layer contacts the magnetic pole, and

the third layer contacts the first shield.

11. The head according to claim 8, further comprising an interconnect configured to supply a current to the stacked body, the current having an orientation from the second layer toward the third layer.

12. A magnetic recording and reproducing device, comprising:

the magnetic head according to claim 8;

a magnetic recording medium where information is recorded by the magnetic head; and

a first electrical circuit configured to supply a current to the stacked body, the current having an orientation from the second layer toward the third layer.

13. The device according to claim 12, further comprising a second electrical circuit,

the magnetic head further including a coil,

at least a portion of the coil being positioned between the magnetic pole and the first shield,

the second electrical circuit being configured to supply a current to the coil, the current corresponding to the information.

14. A magnetic head, comprising:

a magnetic pole;

a first shield; and

a stacked body provided between the magnetic pole and the first shield,

the stacked body including

a first layer including at least one first element selected from the group consisting of Fe, Co, and Ni,

a second layer provided between the magnetic pole and the first layer, the second layer including at least one second element selected from the group consisting of Cr, V, Mn, Ti, and Sc, and

a third layer provided between the first layer and the first shield, the third layer including at least one third element selected from the group consisting of Cr, V, Mn, Ti, and Sc,

wherein

the second layer further includes at least one selected from the group consisting of Fe, Co, and Ni, and

the third layer further includes at least one selected from the group consisting of Fe, Co, and Ni.

15. A magnetic recording and reproducing device, comprising:

the magnetic head according to claim 14;

a magnetic recording medium where information is recorded by the magnetic head; and

a first electrical circuit configured to supply a current to the stacked body, the current having an orientation from the second layer toward the third layer.

16. The device according to claim 15, further comprising a second electrical circuit,

the magnetic head further including a coil,

at least a portion of the coil being positioned between the magnetic pole and the first shield,

the second electrical circuit being configured to supply a current to the coil, the current corresponding to the information.

17. A magnetic head, comprising:

a magnetic pole;

a first shield; and

a stacked body provided between the magnetic pole and the first shield,

the stacked body including

a first layer including at least one first element selected from the group consisting of Fe, Co, and Ni,

a second layer provided between the magnetic pole and the first layer, the second layer including at least one second element selected from the group consisting of Cr, V, Mn, Ti, and Sc, and

a third layer provided between the first layer and the first shield, the third layer including at least one third element selected from the group consisting of Cr, V, Mn, Ti, and Sc,

wherein

a concentration of the second element in the second layer is not less than 1 atomic percent and not more than 80 atomic percent, and

a concentration of the third element in the third layer is not less than 1 atomic percent and not more than 80 atomic percent.

18. A magnetic head, comprising:

a magnetic pole;

a first shield; and

a stacked body provided between the magnetic pole and the first shield,

the stacked body including

a first layer including at least one first element selected from the group consisting of Fe, Co, and Ni,

a second layer provided between the magnetic pole and the first layer, the second layer including at least one second element selected from the group consisting of Cr, V, Mn, Ti, and Sc, and

a third layer provided between the first layer and the first shield, the third layer including at least one third element selected from the group consisting of Cr, V, Mn, Ti, and Sc,

wherein

a first thickness of the first layer along a first direction from the second layer toward the third layer is not less than 3 nanometers and not more than 20 nanometers,

a second thickness of the second layer along the first direction is thinner than the first thickness, and

a third thickness of the third layer along the first direction is thinner than the first thickness.

19. A magnetic head, comprising:

a magnetic pole;

a first shield; and

a stacked body provided between the magnetic pole and the first shield,

the stacked body including

a first layer including at least one first element selected from the group consisting of Fe, Co, and Ni,

a second layer provided between the magnetic pole and the first layer, the second layer including at least one second element selected from the group consisting of Cr, V, Mn, Ti, and Sc, and

a third layer provided between the first layer and the first shield, the third layer including at least one third element selected from the group consisting of Cr, V, Mn, Ti, and Sc,

wherein a magnetization of the first layer has a component having a reverse orientation of a magnetic field emitted from the magnetic pole.