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.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics