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Sang-Koog Kim,J. B. Kortright,Sung-Chul Shin 한국자기학회 2000 Journal of Magnetics Vol.5 No.3
Soft x-ray standing waves produced by a multilayer interference substrate add depth-sensitivity to magnetic circular dichroism to resolve changes in Co magnetism across a 10 Å distance from the Co center to the Co-Pd interface of a Pd/Co/Pd trilayer having in-plane magnetization. Large enhancements of in-plane orbital and spin magnetic moments, as well as the number of d holes, are strongly localized in a thin interface layer. These results provide new insight into the phenomenon of magnetic anisotropy at buried interfaces, and suggest a broad applicability of such standing wave measurements to interface magnetism studies.
Switchable Uncompensated Antiferromagnetic Spins : Their Role in Exchange Bias
Ki-Suk Lee,Sang-Koog Kim,J. B. Kortright,Kwang-Youn Kim,Sung-Chul Shin 한국자기학회 2005 Journal of Magnetics Vol.10 No.1
We report element-resolved and interface-sensitive magnetization reversals investigated from an oppositely exchange-biased NiFe/FeMn/Co structure by employing soft x-ray resonant Kerr rotation measurements. We have found not only switchable uncompensated antiferromagnetic regions with its sizable thicknesses at both interfaces of the FeMn layer but also their strong coupling to the individual ferromagnetic layers. These experimental results provide a better insight into experimentally observed reductions in exchange-bias field on the basis of an interface-proximity model proposed in this work.