| 摘要 |
<p>A CPP giant magnetoresistive element 1 includes a multilayer film T1 including a lower pinned magnetic layer 40 having a laminated ferrimagnetic structure including a lower first pinned magnetic sublayer 41 , a lower nonmagnetic intermediate sublayer 42 , and a lower second pinned magnetic sublayer 43; a lower nonmagnetic layer 50; a free magnetic layer 60; an upper nonmagnetic layer 70; and an upper pinned magnetic layer 80 having a laminated ferrimagnetic structure including an upper second pinned magnetic sublayer 81, an upper nonmagnetic intermediate sublayer 82, and an upper first pinned magnetic sublayer 83 disposed in that order. Each of the free magnetic layer and the lower and upper second pinned magnetic sublayers is composed of a NiFeX alloy or NiFeCoX alloy, X being an element which decreases the saturation magnetization of a NiFe or NiFeCo base. X can be Cu, Au, Ag, Zn, Mn, Al, Cd, Zr or Hf. The free layer is made of two sublayers one of NiFeX or NiFeCoX and one of CoFe which is in contact with the nonmagnetic layer and is thinner than the other sublayer.</p> |
