Magnetic head and magnetic recording device

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 layer,
• a second magnetic layer provided between the second magnetic pole and the first magnetic layer,
• a third magnetic layer provided between the second magnetic pole and the second magnetic layer,
• a first non-magnetic layer provided between the first magnetic layer and the first magnetic pole,
• a second non-magnetic layer provided between the second magnetic layer and the first magnetic layer,
• a third non-magnetic layer provided between the third magnetic layer and the second magnetic layer, and
• a fourth non-magnetic layer provided between the second magnetic pole and the third magnetic layer, wherein
• the first non-magnetic layer contacts the first magnetic layer and the first magnetic pole,
• the second non-magnetic layer contacts the second magnetic layer and the first magnetic layer,
• the third non-magnetic layer contacts the third magnetic layer and the second magnetic layer, and
• the fourth non-magnetic layer contacts the second magnetic pole and the third magnetic layer,
• a first thickness of the first magnetic layer along a first direction from the first magnetic pole toward the second magnetic pole being thicker than a second thickness of the second magnetic layer along the first direction, and
• a third thickness of the third magnetic layer along the first direction being thicker than the second thickness.