Magnetic recording device including a magnetic head including a stacked body between magnetic poles
According to one embodiment, a magnetic head includes a first magnetic pole, a second magnetic pole, and a stacked body provided between the first and second magnetic poles. The stacked body includes a first magnetic member, a second magnetic member provided between the first and second magnetic members, and a first layer provided between the first and second magnetic members, and including at least one selected from the group consisting of Cr, V, Mn, Ti and Sc. The first magnetic member includes first magnetic regions and a first non-magnetic region. A direction from one of the first magnetic regions toward another one of the first magnetic regions is along a first direction from the first magnetic pole toward the second magnetic pole. The first non-magnetic region is between the one of the first magnetic regions and the other one of the first magnetic regions.
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 member,
a second magnetic member provided between the first magnetic member and the second magnetic member, and
a first layer provided between the first magnetic member and the second magnetic member, and including at least one selected from the group consisting of Cr, V, Mn, Ti and Sc,
the first magnetic member including a plurality of first magnetic regions and a first non-magnetic region,
a direction from one of the first magnetic regions toward another one of the first magnetic regions being along a first direction from the first magnetic pole toward the second magnetic pole,
the first non-magnetic region being between the one of the first magnetic regions and the other one of the first magnetic regions,
the first non-magnetic region including at least one selected from the group consisting of Cr, V, Mn, Ti and Sc,
the first magnetic regions including at least one selected from the group consisting of Fe, Co and Ni, and
a first layer thickness along the first direction of the first layer being thicker than a first non-magnetic region thickness along the first direction of the first non-magnetic region,
wherein
the second magnetic member includes a plurality of second magnetic regions and a second non-magnetic region,
a direction from one of the second magnetic regions toward another one of the second magnetic regions is along the first direction,
the second non-magnetic region is between the one of the second magnetic regions and the other one of the second magnetic regions,
the second non-magnetic region includes at least one selected from the group consisting of Cr, V, Mn, Ti and Sc, and
the second magnetic regions include at least one selected from the group consisting of Fe, Co and Ni.
2. The head according to claim 1 , wherein
the first layer thickness exceeds 1 times the first non-magnetic region thickness and is not more than 16.7 times.
3. The head according to claim 2 , wherein
the first layer thickness is not less than 0.8 nm and not more than 2.5 nm.
4. The head according to claim 2 , wherein
the first layer thickness is not less than 0.8 nm and not more than 1.2 nm.
5. The head according to claim 2 , wherein
the first non-magnetic region thickness is not less than 0.15 nm and not more than 0.8 nm.
6. The head according to claim 1 , wherein
a first magnetic region thickness along the first direction of the one of the first magnetic regions is not less than 0.1 nm and not more than 0.8 nm.
7. The head according to claim 1 , wherein
the first magnetic member includes a plurality of the first non-magnetic regions,
one of the first magnetic regions is between one of the first non-magnetic regions and another one of the first non-magnetic regions.
8. The head according to claim 7 , wherein
number of the first magnetic regions is not less than 2 and not more than 20.
9. The head according to claim 7 , wherein
one of the first non-magnetic regions is in contact with the first layer.
10. The head according to claim 1 , wherein
one of the first magnetic regions is in contact with the first layer.
11. The head according to claim 1 , wherein
the stacked body includes a second layer provided between the second magnetic member and the second magnetic pole, and
the second layer includes Cu.
12. The head according to claim 11 , wherein
the stacked body includes a second magnetic pole side magnetic layer provided between the second layer and the second magnetic pole, and
the second magnetic pole side magnetic layer includes at least one selected from the group consisting of Fe, Co and Ni.
13. The head according to claim 1 , wherein
the stacked body includes a third layer provided between the first magnetic pole and the first magnetic member, and
the third layer includes at least one selected from the group consisting of Ta, Ru and Cr.
14. The head according to claim 1 , wherein
the second magnetic member includes a plurality of the second non-magnetic regions, and
one of the second magnetic regions is between one of the second non-magnetic regions and the other one of the second non-magnetic regions.
15. The head according to claim 1 , wherein
when a current having an orientation from the second magnetic member toward the first magnetic member flows through the stacked body, an alternating magnetic field is emitted from the stacked body.
16. A magnetic recording device, comprising:
the magnetic head according to claim 1 ; and
an electric circuit,
the electric circuit being configured to supply a current to the magnetic head, and
the current having an orientation from the second magnetic member toward the first magnetic member.
17. The device according to claim 16 , wherein
when the current flows through the stacked body, an alternating magnetic field is emitted from the stacked body.
18. 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 member,
a second magnetic member provided between the first magnetic member and the second magnetic member, and
a first layer provided between the first magnetic member and the second magnetic member, and including at least one selected from the group consisting of Cr, V, Mn, Ti and Sc,
the first magnetic member including a plurality of first magnetic regions and a first non-magnetic region,
a direction from one of the first magnetic regions toward another one of the first magnetic regions being along a first direction from the first magnetic pole toward the second magnetic pole,
the first non-magnetic region being between the one of the first magnetic regions and the other one of the first magnetic regions,
the first non-magnetic region including at least one selected from the group consisting of Cr, V, Mn, Ti and Sc,
the first magnetic regions including at least one selected from the group consisting of Fe, Co and Ni, and
a first layer thickness along the first direction of the first layer being thicker than a first non-magnetic region thickness along the first direction of the first non-magnetic region,
wherein
the stacked body further includes a third magnetic member provided between the first magnetic pole and the first magnetic member,
the third magnetic member includes a plurality of third magnetic regions and a third non-magnetic region,
a direction from one of the third magnetic regions toward another one of the third magnetic regions is along the first direction,
the third non-magnetic region is between the one of the third magnetic regions and the other one of the third magnetic regions,
the third non-magnetic region includes at least one selected from the group consisting of Cr, V, Mn, Ti and Sc, and
the third magnetic regions include at least one selected from the group consisting of Fe, Co and Ni.
19. The head according to claim 18 , wherein
the second magnetic member includes at least one selected from the group consisting of Fe, Co and Ni.