Pradipto, Abdul-Muizz Yakushiji, Kay Ham, Woo Seung Kim, Sanghoon Shiota, Yoichi Moriyama, Takahiro Kim, Kyoung-Whan Lee, Hyun-Woo Nakamura, Kohji Lee, Kyung-Jin Ono, Teruo 2024-01-19T20:02:27Z 2024-01-19T20:02:27Z 2021-09-02 2019-05-22 2469-9950 https://pubs.kist.re.kr/handle/201004/119982 We systematically investigate the perpendicular magnetocrystalline anisotropy (MCA) in Co-Pt/Pd-based multilayers. Our magnetic measurement data show that the asymmetric Co/Pd/Pt multilayer has a significantly larger perpendicular magnetic anisotropy (PMA) energy compared to the symmetric Co/Pt and Co/Pd multilayer samples. We further support this experiment by first-principles calculations on CoPt2, CoPd2, and CoPtPd, which are composite bulk materials that consist of three atomic layers in a unit cell, Pt/Co/Pt, Pd/Co/Pd, and Pt/Co/Pd, respectively. By estimating the contribution of bulk spin-momentum coupling to the MCA energy, we show that the CoPtPd multilayer with symmetry breaking has a significantly larger PMA energy than the other multilayers that are otherwise similar but lack symmetry breaking. This observation thus provides evidence of the PMA enhancement due to the structural inversion symmetry breaking and highlights the asymmetric CoPtPd as an artificial magnetic material with bulk spin-momentum coupling, which opens a pathway toward the design of materials with strong PMA. English AMER PHYSICAL SOC ELECTRIC-FIELD CONTROL MICROSCOPIC ORIGIN ELECTRONICS SURFACES CO/PT Enhanced perpendicular magnetocrystalline anisotropy energy in an artificial magnetic material with bulk spin-momentum coupling Article 10.1103/PhysRevB.99.180410 1 Physical Review B, v.99, no.18 Physical Review B 99 18 scie scopus 000469056800001 2-s2.0-85066397577 Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Materials Science Physics Article ELECTRIC-FIELD CONTROL MICROSCOPIC ORIGIN ELECTRONICS SURFACES CO/PT 자기이방성 비대칭성 인공초격자 스핀-궤도 결합