TY - JOUR
T1 - Correlation among exchange coupling, surface roughness and junction size in magnetic tunnel junctions
AU - Sankaranarayanan, V. K.
AU - Hu, Yongkang
AU - Kim, Cheolgi
AU - Kim, Chong Oh
AU - Tsunoda, M.
AU - Takahashi, M.
N1 - Funding Information:
This work was supported by the Research Centre for Advanced Magnetic Materials, Chungnam National University and Brain Pool Programme, KOSEF, Korea.
PY - 2004/5
Y1 - 2004/5
N2 - Magneto-optic Kerr Effect, atomic force microscopy and magnetoresistance measurements have been carried out on as-deposited and annealed magnetic tunnel junctions with junction sizes 180, 250, 320 and 380 μm in order to investigate the correlation among interlayer exchange coupling, surface roughness and junction size. The interlayer exchange coupling (HE) shows very good correlation with surface roughness across the junction in agreement with Neel's orange peel coupling. The normalized HE and Hc values are constant over the junction in larger junctions while tunneling magnetoresistance ratios generally improve with increasing junction size.
AB - Magneto-optic Kerr Effect, atomic force microscopy and magnetoresistance measurements have been carried out on as-deposited and annealed magnetic tunnel junctions with junction sizes 180, 250, 320 and 380 μm in order to investigate the correlation among interlayer exchange coupling, surface roughness and junction size. The interlayer exchange coupling (HE) shows very good correlation with surface roughness across the junction in agreement with Neel's orange peel coupling. The normalized HE and Hc values are constant over the junction in larger junctions while tunneling magnetoresistance ratios generally improve with increasing junction size.
KW - Interlayer exchange coupling
KW - Junction size
KW - Magnetic tunnel junctions
KW - MOKE
KW - Surface roughness
KW - Tunneling magnetoresistance
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U2 - 10.1016/j.jmmm.2004.01.019
DO - 10.1016/j.jmmm.2004.01.019
M3 - Article
AN - SCOPUS:11144244225
SN - 0304-8853
VL - 272-276
SP - 1965
EP - 1966
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - III
ER -