Interfacial studies of polymeric spin-valve structures

• Published in: Synthetic metals Vol. 173; pp. 51 - 56
• Main Authors: Liu, C.-Y., AlQahtani, H.R.H., Grell, M., Allwood, D.A., Gibbs, M.R.J., Morley, N.A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01-06-2013; Elsevier
• Subjects: Application fields; Applied sciences; Electronics; Exact sciences and technology; Interfaces; Magnetoelectric, magnetostrictive, magnetoacoustic, magnetooptic and magnetothermal devices. Spintronics; Organic spintronics; Polymer industry, paints, wood; Polymers; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Technology of polymers; Interfaces; Polymers; Organic spintronics; Spin valve; Aromatic polymer; Semicrystalline polymer; Surface topography; Experimental study; Iron alloy; Magnetic alloy; Conjugated polymer; Thiophene derivative polymer; Size effect; Electric resistivity; Amorphous polymer; Electrochemical reaction; Comparative study; Nickel alloy; Magnetic properties; Binary alloy; Bilayers
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2012.12.012

► Polymer structure influences the amount of penetration of the top magnetic electrode. ► Polymer structure affects the magnetic properties of the top electrode. ► Amorphous polymer had smaller surface roughness and less magnetic film penetration.
The interfaces between the organic semiconductor and the magnetic electrodes in organic spin-valves are very important for the efficient injection and extraction of the spin carriers from the organic semiconductor. One of the problems encountered during the fabrication of organic spin-valves is the penetration of the top magnetic electrode into the organic semiconductor layer. This can cause a magnetic “dead” layer which can reduce the efficiency of the spin-valve. This paper investigates the interface between different polymeric semiconductors and the NiFe top layer, including how much the NiFe penetrates into the polymer layer, and whether the magnetic properties of the NiFe change with thickness and different organic layers.