Magnetic head with multilayer configuration between magnetic poles and magnetic recording device

A magnetic head, comprising:

• a first magnetic pole;
• a second magnetic pole;
• and
• a magnetic element provided between the first magnetic pole and the second magnetic pole,
• the magnetic element including
• a first magnetic layer,
• a second magnetic layer provided between the first magnetic layer and the second magnetic pole,
• a third magnetic layer provided between the second magnetic layer and the second magnetic pole,
• a fourth magnetic layer provided between the third magnetic layer and the second magnetic pole,
• a fifth magnetic layer provided between the fourth magnetic layer and the second magnetic pole,
• a first non-magnetic layer provided between the first magnetic pole and the first magnetic layer,
• a second non-magnetic layer provided between the first magnetic layer and the second magnetic layer,
• a third non-magnetic layer provided between the second magnetic layer and the third magnetic layer,
• a fourth non-magnetic layer provided between the third magnetic layer and the fourth magnetic layer,
• a fifth non-magnetic layer provided between the fourth magnetic layer and the fifth magnetic layer, and
• a sixth non-magnetic layer provided between the fifth magnetic layer and the second magnetic pole,
• the sixth non-magnetic layer including at least one selected from the group consisting of Ru, Ir, Ta, Rh, Pd, Pt and W,
• wherein
• the first non-magnetic layer includes at least one selected from the group consisting of Ru, Ir, Ta, Rh, Pd, Pt and W,
• the fourth non-magnetic layer includes at least one selected from the group consisting of Ru, Ir, Ta, Rh, Pd, Pt and W,
• the second non-magnetic layer includes at least one selected from the group consisting of Cu, Au, Cr, Al, V and Ag,
• the third non-magnetic layer includes at least one selected from the group consisting of Cu, Au, Cr, Al, V and Ag,
• the fifth non-magnetic layer includes at least one selected from the group consisting of Cu, Au, Cr, Al, V and Ag,
• a second thickness of the second magnetic layer in a first direction from the first magnetic pole to the second magnetic pole is thicker than a first thickness of the first magnetic layer in the first direction,
• the second thickness is thicker than a third thickness of the third magnetic layer in the first direction,
• a fourth thickness of the fourth magnetic layer in the first direction is thinner than a fifth thickness of the fifth magnetic layer in the first direction,
• the first magnetic layer directly contacts the first non-magnetic layer and the second non-magnetic layer,
• the second magnetic layer directly contacts the second non-magnetic layer and the third non-magnetic layer,
• the third magnetic layer directly contacts the third non-magnetic layer and the fourth non-magnetic layer,
• the fourth magnetic layer directly contacts the fourth non-magnetic layer and the fifth non-magnetic layer, and
• the fifth magnetic layer directly contacts the fifth non-magnetic layer and the sixth non-magnetic layer.