TY - JOUR
T1 - Investigation of Magnetic Dead Layer on Iron Silicide Surfaces∗
AU - Kibria, Mohammad Tawheed
AU - Nomitsu, Tatsushi
AU - Nakagawa, Takeshi
AU - Mizuno, Seigi
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Numbers JP25287077 and JP15H03677 and Advanced Graduate Program in Global Strategy for Green Asia (Kyushu University).
PY - 2018/4/26
Y1 - 2018/4/26
N2 - We report the magnetic dead layer at the interfaces between Fe and Si(111) surfaces. We prepared two ultrathin iron-silicides, c(8×4) prepared at 900 K and p(2×2) at 700 K, and clean reconstructed 7×7 surface for the silicon templates. By using magneto-optical Kerr effect, we found that at room temperature the ferromagnetic order appears at 5.5 ML, 8.2 ML, and 10.9 ML for Fe/c(8×4) silicide, Fe/p(2×2) silicide, and Fe/Si(111)-7×7 surface, respectively. From the thickness dependent magnetization measurements, we decided the magnetic dead layer for Fe/c(8×4) silicide, Fe/p(2×2) silicide, and Fe/Si(111)-7×7 to be 3.0 ML, 5.0 ML, and 7.5 ML, respectively. Our results indicate that the c(8×4) iron silicide surface prevents further silicide formation more effectively than the p(2×2) silicide and Si(111)-7×7 surface.
AB - We report the magnetic dead layer at the interfaces between Fe and Si(111) surfaces. We prepared two ultrathin iron-silicides, c(8×4) prepared at 900 K and p(2×2) at 700 K, and clean reconstructed 7×7 surface for the silicon templates. By using magneto-optical Kerr effect, we found that at room temperature the ferromagnetic order appears at 5.5 ML, 8.2 ML, and 10.9 ML for Fe/c(8×4) silicide, Fe/p(2×2) silicide, and Fe/Si(111)-7×7 surface, respectively. From the thickness dependent magnetization measurements, we decided the magnetic dead layer for Fe/c(8×4) silicide, Fe/p(2×2) silicide, and Fe/Si(111)-7×7 to be 3.0 ML, 5.0 ML, and 7.5 ML, respectively. Our results indicate that the c(8×4) iron silicide surface prevents further silicide formation more effectively than the p(2×2) silicide and Si(111)-7×7 surface.
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U2 - 10.1380/ejssnt.2018.101]
DO - 10.1380/ejssnt.2018.101]
M3 - Article
AN - SCOPUS:85045926394
SN - 1348-0391
VL - 16
SP - 101
EP - 104
JO - e-Journal of Surface Science and Nanotechnology
JF - e-Journal of Surface Science and Nanotechnology
ER -