TY - JOUR
T1 - Robust perpendicular magnetization of Co nanomagnets against alloy composition
AU - Yang, Hung Hsiang
AU - Hsu, Chuan Che
AU - Lin, Wen Chin
AU - Hasegawa, Yukio
N1 - Funding Information:
Japan Society for the Promotion of Science Ministry of Science and Technology, Taiwan
Funding Information:
This work is partially supported by Grants-in-Aid for Scientic Research from the Japan Society for the Promotion of Science (Grants No. JP16H02109, No. JP18K19013, and No. JP19H00859) and Ministry of Science and Technology of Taiwan under Grant No. MOST 108-2112-M-003-011-MY2.
Publisher Copyright:
©2021 American Physical Society
PY - 2021/7/15
Y1 - 2021/7/15
N2 - bilayer nanomagnets formed on a Cu(111) substrate with the alloy composition of , 0.2, 0.5, 0.8, and 1 were investigated using scanning tunneling microscopy (STM). The islands with , 0.2, and 0.5 were further studied using spin-polarized STM. With , the nanoislands exhibit triangular shapes similar to the pure Co islands with an upward shift in the peak energy of the minority state. On the other hand, at , the appearance of the nanoislands evolve to a round shape, and the peak energy is distributed irregularly within the islands. A hexagonal shape and inhomogeneous electronic states similar to pure Fe islands are observed on the islands. The magnetic field dependence of the spin-sensitive signal revealed that the perpendicular anisotropy of the alloy islands is persistent up to half of the Fe alloy composition.
AB - bilayer nanomagnets formed on a Cu(111) substrate with the alloy composition of , 0.2, 0.5, 0.8, and 1 were investigated using scanning tunneling microscopy (STM). The islands with , 0.2, and 0.5 were further studied using spin-polarized STM. With , the nanoislands exhibit triangular shapes similar to the pure Co islands with an upward shift in the peak energy of the minority state. On the other hand, at , the appearance of the nanoislands evolve to a round shape, and the peak energy is distributed irregularly within the islands. A hexagonal shape and inhomogeneous electronic states similar to pure Fe islands are observed on the islands. The magnetic field dependence of the spin-sensitive signal revealed that the perpendicular anisotropy of the alloy islands is persistent up to half of the Fe alloy composition.
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U2 - 10.1103/PhysRevB.104.035422
DO - 10.1103/PhysRevB.104.035422
M3 - Article
AN - SCOPUS:85110650306
SN - 2469-9950
VL - 104
JO - Physical Review B
JF - Physical Review B
IS - 3
M1 - 035422
ER -