Magnetic response of an ultrathin cobalt film in contact with an organic pentacene layer.
To emulate the interfacial regimes of a Co/Pc/Co spin-valve structure, we fabricated ultrathin pentacene/cobalt (Pc/Co) and cobalt/pentacene (Co/Pc) bilayers. Through measurement of the magneto-optical Kerr effect, we found the Co layer has its magnetic properties depend strongly upon the order of deposition. Further x-ray spectroscopy and microscopy investigation indicated Co/Pc was chemically stable, whereas Pc/Co was reactive and exhibited complex magnetization pattern. The different chemistry and magnetic configurations at interfaces could cause additional complication for spin injection.
Chan
Yuet-Loy
YL
National Synchrotron Radiation Research Center, 30076 Hsinchu, Taiwan.
Hung
Ya-Jyuan
YJ
Wang
Chia-Hao
CH
Lin
Ying-Chang
YC
Chiu
Ching-Yuan
CY
Lai
Yu-Ling
YL
Chang
Hsu-Ting
HT
Lee
Chih-Hao
CH
Hsu
Y J
YJ
Wei
D H
DH