TY - JOUR
T1 - Enhancement of exchange bias by ultra-thin Mn layer insertion at the interface of Mn-Ir/Co-Fe bilayers
AU - Tsunoda, M.
AU - Yoshitaki, S.
AU - Ashizawa, Y.
AU - Kim, D. Y.
AU - Mitsumata, C.
AU - Takahashi, Migaku
PY - 2007/12/1
Y1 - 2007/12/1
N2 - Effects of ultra-thin Mn, Ru, Pd, Ta, Gd, and Tb layer insertion at the interface on the exchange bias of Mn75Ir25ZCo 70Fe30 bilayers were investigated. Unidirectional anisotropy constant, JK, of the bilayer was significantly enhanced from 0.46 erg/cm2 to 0.84 erg/cm2 with the insertion of 0.5-nm-thick Mn layer, while it was reduced with increasing the inserted layer thickness for the other materials. The value of 0.84 erg/cm2 was not obtained in the variation of JK with respect to the chemical composition of Mn-Ir layer in a range of Ir content of 0 - 40 at.%. The cause of the enhancement of JK with ultra-thin Mn insertion might be due to the modification of antiferromagnetic spin structure at the interface.
AB - Effects of ultra-thin Mn, Ru, Pd, Ta, Gd, and Tb layer insertion at the interface on the exchange bias of Mn75Ir25ZCo 70Fe30 bilayers were investigated. Unidirectional anisotropy constant, JK, of the bilayer was significantly enhanced from 0.46 erg/cm2 to 0.84 erg/cm2 with the insertion of 0.5-nm-thick Mn layer, while it was reduced with increasing the inserted layer thickness for the other materials. The value of 0.84 erg/cm2 was not obtained in the variation of JK with respect to the chemical composition of Mn-Ir layer in a range of Ir content of 0 - 40 at.%. The cause of the enhancement of JK with ultra-thin Mn insertion might be due to the modification of antiferromagnetic spin structure at the interface.
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U2 - 10.1002/pssb.200777391
DO - 10.1002/pssb.200777391
M3 - Article
AN - SCOPUS:38049148557
VL - 244
SP - 4470
EP - 4473
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
SN - 0370-1972
IS - 12
ER -