Magnetic head and magnetic recording device with stacked body material configurations

A magnetic recording device, comprising:

• a magnetic head;
• and
• an electrical circuit,
• the magnetic head including
• 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 nonmagnetic layer,
• a first magnetic layer provided between the first nonmagnetic layer and the second magnetic pole,
• a first layer provided between the first magnetic layer and the second magnetic pole,
• a second nonmagnetic layer provided between the first layer and the second magnetic pole,
• a second magnetic layer provided between the second nonmagnetic layer and the second magnetic pole, and
• a third nonmagnetic layer provided between the second magnetic layer and the second magnetic pole,
• the first magnetic layer including at least one first element selected from the group consisting of Co, Fe, and Ni, a concentration of the first element in the first magnetic layer being 50 atomic % or more,
• the second magnetic layer including at least one second element selected from the group consisting of Fe, Ni, and Co, and at least one third element selected from the group consisting of Cr, V, Mn, Ti, and Sc,
• the first layer including at least one selected from the group consisting of Ta, Zr, Hf, Mo, W, Tc, Re, Ru, Rh, Os, Ir, Pd, Pt, Mn, Cr, V, Ti, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu,
• the electrical circuit being configured to supply, to the stacked body, a first current having a first orientation from the second magnetic pole toward the first magnetic pole, wherein the first orientation of the first current is opposite to an electron current orientation, and
• wherein the first layer contacts the first magnetic layer and the second nonmagnetic layer.