講演情報
[20a-D61-3]Improved magnetic properties in CoFeB/MgFeO multilayers with Fe segregated interfaces
〇Tomohiro Ichinose1, Tatsuya Yamamoto1, Takayuki Nozaki1, Kay Yakushiji1, Shingo Tamaru1, Shinji Yuasa1 (1.AIST)
キーワード：
magnetic tunnel junction、perpendicular magnetic anisotropy、segregation
We investigated effects of Fe segregation from partially Fe-substituted MgO (MgFeO) on the magnetic properties of CoFeB/MgFeO multilayers. X-ray photoelectron spectroscopy and magnetic measurements revealed that segregated Fe reduced to metallic Fe and ferromagnetism was
exhibited at the CoFeB/MgFeO interface. The CoFeB/MgFeO based multilayers exhibited 1.2 times larger PMA compared with CoFeB/MgO multilayers. Ferromagnetic resonance measurements also revealed a remarkable reduction of magnetic damping in the CoFeB/MgFeO multilayers
exhibited at the CoFeB/MgFeO interface. The CoFeB/MgFeO based multilayers exhibited 1.2 times larger PMA compared with CoFeB/MgO multilayers. Ferromagnetic resonance measurements also revealed a remarkable reduction of magnetic damping in the CoFeB/MgFeO multilayers
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