TY - JOUR
T1 - Magnetic properties of epitaxial Fe/MgO structures on Si(100)
AU - Jo, Jeong Hong
AU - Shin, Eun Jeong
AU - Kim, Hyung jun
AU - Lim, Sang Ho
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIP) (Nos. 2011-0028163 and 2015-004870 ).
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/1/1
Y1 - 2017/1/1
N2 - The magnetic properties of epitaxial Fe/MgO structures on Si(100) substrates are investigated over an Fe thickness range of 2–20 nm. Superparamagnetic behavior is observed at an Fe thickness of 2 nm, indicating that no continuous Fe thin film is formed. At Fe thicknesses of 5 nm and higher, a continuous two-dimensional layered structure is formed, which has a dominant epitaxial relationship of Fe[010](100)//MgO[011¯] (100)//Si[011¯](100) and a minor portion of Fe[010](100)//MgO[010](100)//Si[011¯](100). This structural feature is echoed by a four-fold magnetic anisotropy in the film plane, and this tendency increases with increasing Fe thickness. The strength of the first-order cubic magnetocrystalline anisotropy, which can only be extracted from the structures, is in the range of 3.87×105–4.04×105 erg/cm3, weaker than that of bulk Fe (4.8×105 erg/cm3).
AB - The magnetic properties of epitaxial Fe/MgO structures on Si(100) substrates are investigated over an Fe thickness range of 2–20 nm. Superparamagnetic behavior is observed at an Fe thickness of 2 nm, indicating that no continuous Fe thin film is formed. At Fe thicknesses of 5 nm and higher, a continuous two-dimensional layered structure is formed, which has a dominant epitaxial relationship of Fe[010](100)//MgO[011¯] (100)//Si[011¯](100) and a minor portion of Fe[010](100)//MgO[010](100)//Si[011¯](100). This structural feature is echoed by a four-fold magnetic anisotropy in the film plane, and this tendency increases with increasing Fe thickness. The strength of the first-order cubic magnetocrystalline anisotropy, which can only be extracted from the structures, is in the range of 3.87×105–4.04×105 erg/cm3, weaker than that of bulk Fe (4.8×105 erg/cm3).
KW - Epitaxial thin films
KW - Fe/MgO/Si(100) system
KW - Magnetic anisotropy
KW - Si spintronics
UR - http://www.scopus.com/inward/record.url?scp=84982290214&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2016.08.045
DO - 10.1016/j.jmmm.2016.08.045
M3 - Article
AN - SCOPUS:84982290214
SN - 0304-8853
VL - 421
SP - 440
EP - 447
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
ER -