AVS 64th International Symposium & Exhibition
    Surface Science Division Monday Sessions
       Session SS+AS+MI-MoM

Paper SS+AS+MI-MoM10
Enhanced Long-range Magnetic Order by the Organic-Ferromagnetic Hybrid Interface

Monday, October 30, 2017, 11:20 am, Room 25

Session: Organic/Inorganic Surfaces and Interfaces
Presenter: Yao-Jane Hsu, National Synchrotron Radiation Research Center, Taiwan, Republic of China
Authors: Y.J. Hsu, National Synchrotron Radiation Research Center, Taiwan, Republic of China
M.W. Lin, National Synchrotron Radiation Research Center, Taiwan, Republic of China
P.H. Chen, National Tsing-Hua University, Taiwan, Republic of China
Y.L. Lai, National Synchrotron Radiation Research Center, Taiwan, Republic of China
T.N. Lam, National Chiao-Tung University, Taiwan, Republic of China
D.H. Wei, National Synchrotron Radiation Research Center, Taiwan, Republic of China
H.J. Lin, National Synchrotron Radiation Research Center, Taiwan, Republic of China
Y.Y. Chin, National Synchrotron Radiation Research Center, Taiwan, Republic of China
J.H. Wang, National Taiwan Normal University, Taiwan, Republic of China
Correspondent: Click to Email
The interplay between ferromagnetic and organic layers critically affects the efficiency of spin filtering in the organic/molecular spintronics. The hybridized properties at organic-ferromagnetic heterostructure is hence important. We investigated the spin interface in terms of the electronic structure and magnetic coupling of tetrafluorotetracyanoquinodimethane (F4-TCNQ) on nickel (Cu(100)/Ni) surface. The experimental results display magnetic hardening upon F4-TCNQ adsorbed on Ni surface. This enhanced magnetic ordering after molecular tailoring was studied by the surface-sensitive and element specific X-ray Magnetic Circular Dichroism (XMCD). The XMCD reveals that the orbital and spin moment of Ni is significantly increased on the in-plane, while that keep almost unaltered at out-of-plane. Through the strong superexchange coupling at in-plane surface, the nonmagnetic F4-TCNQ is spin polarized. Additionally, we found the enhanced magnetic ordering expressed larger domain sizes and less domain boundary from the measurements of surface magnetic anisotropy performed by magneto-optical Kerr effect (MOKE) and the magnetic domains inspected by photoelectron-emission microscope (PEEM). It suggests that the enhanced long-range magnetic order of organic-ferromagnetic interface is an effective spin filtering for constructing high efficient organic spintronics.