[22p-12K-1~14] 10.1 Emerging materials in spintronics and magnetics (including fabrication and characterization methodologies)

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)English Presentation

[22p-12K-3] Two-dimensional imaging of spin and orbital magnetic moments in ultra-thin Co films by soft X-ray ptychography

〇Shoya Sakamoto¹, Yoko Takeo^1,2, Noboru Furuya³, Kai Sakurai³, Kyota Yoshinaga³, Akihiro Suzuki⁴, Iwao Matsuda^1,5, Yoshihisa Harada¹, Takashi Kimura¹, Shinji Miwa^1,5 (1.ISSP, Univ. of Tokyo, 2.JASRI, 3.Univ. of Tokyo, 4.RIES, Hokkaido Univ., 5.TQSI, Univ. of Tokyo)

Keywords:

Perpendicular magnetic anisotropy,XMCD,Ptychography

As technology continues to advance, there is a growing demand for imaging nanometer-scale devices and spin textures. Among various imaging techniques, x-rays imaging stands out for its high spatial resolution and element-selectivity. Circularly polarized x-rays enable the separate imaging of spin and orbital magnetic moments through x-ray magnetic circular dichroism (XMCD). In this study, we performed XMCD ptychography measurements to demonstrate the two-dimensional mapping of spin and orbital magnetic moments in an ultrathin Co layer of 0.6 nm. The measurements were conducted at BL07LSU of SPring-8 [4]. The sample was grown using molecular beam epitaxy with the following structure: Si-SiN substrate/Ta (3 nm)/Pt (5 nm)/Co (0.6 nm)/Pt (3 nm). The obtained spin and orbital magnetic moment mappings clearly reveal ferromagnetic domains with an out-of-plane easy axis.