title: Magnetic response of an ultrathin cobalt film in contact with an organic pentacene layer.
abstract: 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.
authors.affiliation: National Synchrotron Radiation Research Center, 30076 Hsinchu, Taiwan.
authors.forename: Yuet-Loy
authors.initials: YL
authors.lastname: Chan
authors.forename: Ya-Jyuan
authors.initials: YJ
authors.lastname: Hung
authors.forename: Chia-Hao
authors.initials: CH
authors.lastname: Wang
authors.forename: Ying-Chang
authors.initials: YC
authors.lastname: Lin
authors.forename: Ching-Yuan
authors.initials: CY
authors.lastname: Chiu
authors.forename: Yu-Ling
authors.initials: YL
authors.lastname: Lai
authors.forename: Hsu-Ting
authors.initials: HT
authors.lastname: Chang
authors.forename: Chih-Hao
authors.initials: CH
authors.lastname: Lee
authors.forename: Y J
authors.initials: YJ
authors.lastname: Hsu
authors.forename: D H
authors.initials: DH
authors.lastname: Wei