TY - JOUR
T1 - Magnetic properties of NiFe/Ru(V)/NiFe synthetic ferrimagnetic layers
AU - Jung, Young Soon
AU - Song, Oh Sung
AU - Yoon, Chong Seung
PY - 2004/6
Y1 - 2004/6
N2 - We fabricated synthetic ferrimagnetic layers (SyFL) based on NiFe/Ru/NiFe or NiFe/V/NiFe for the free electrode of magnetic tunnel junctions (MTJ) and characterized their spin flopping, coercive and saturation fields. NiFe/Ru/NiFe SyFL exhibited a coercive field of 10 Oe, which would produce a coercive field of less than 50 Oe when incorporated into sub-micrometer sized MTJ. In comparison, NiFe/V/NiFe SyFL showed extremely low exchange coupling; only when the thickness of the V layer was ∼0.8 nm, appreciable level of exchange coupling was observed. The coercive field of the NiFe/V/NiFe SyFL, however, did not have a large dependence on the thickness of V and remained at ∼2 Oe. The coercive field of the V-SyFL is expected to maintain below 10 Oe even after patterned into a tunnel junction. Both NiFe/Ru/NiFe and NiFe/V/NiFe SyFLs were stable up to 525 K without showing any gross changes in microstructure and magnetic properties when thermally annealed.
AB - We fabricated synthetic ferrimagnetic layers (SyFL) based on NiFe/Ru/NiFe or NiFe/V/NiFe for the free electrode of magnetic tunnel junctions (MTJ) and characterized their spin flopping, coercive and saturation fields. NiFe/Ru/NiFe SyFL exhibited a coercive field of 10 Oe, which would produce a coercive field of less than 50 Oe when incorporated into sub-micrometer sized MTJ. In comparison, NiFe/V/NiFe SyFL showed extremely low exchange coupling; only when the thickness of the V layer was ∼0.8 nm, appreciable level of exchange coupling was observed. The coercive field of the NiFe/V/NiFe SyFL, however, did not have a large dependence on the thickness of V and remained at ∼2 Oe. The coercive field of the V-SyFL is expected to maintain below 10 Oe even after patterned into a tunnel junction. Both NiFe/Ru/NiFe and NiFe/V/NiFe SyFLs were stable up to 525 K without showing any gross changes in microstructure and magnetic properties when thermally annealed.
UR - http://www.scopus.com/inward/record.url?scp=3142746171&partnerID=8YFLogxK
U2 - 10.1002/pssa.200304569
DO - 10.1002/pssa.200304569
M3 - Article
AN - SCOPUS:3142746171
SN - 0031-8965
VL - 201
SP - 1724
EP - 1727
JO - Physica Status Solidi (A) Applied Research
JF - Physica Status Solidi (A) Applied Research
IS - 8
ER -