Abstract
Organic spin devices utilizing the properties of both spin and charge inherent in electrons have attracted extensive research interest in the field of future electronic device development. In the last decade, magnetoresistance effects, including giant magetoresistance and tunneling magnetoresistance, have been observed in organic spintronics. Significant progress has been made in understanding spin-dependent transport phenomena, such as spin injection or tunneling, manipulation, and detection in organic spintronics. However, to date, materials that are effective for preparing organic spin devices for commercial applications are still lacking. In this report, we introduce basic knowledge of the fabrication and evaluation of organic spin devices, and review some remarkable applications for organic spin valves using molecular spacers. The current bottlenecks that hinder further enhancement for the performance of organic spin devices is also discussed. This report presents some research ideas for designing organic spin devices operated at room temperature.
Highlights
Organic spintronics is an emerging research field, within the broader field of spintronics and organic semiconductors (OSCs)
Coherent tunneling and incoherent hopping are two widely accepted cases of the conduction Coherent tunneling and incoherent hopping are two widely accepted cases of the conduction regime in the organic spin valves (OSVs) [16,28,43], which correspond to the tunneling magetoresistance (TMR) and giant magetoresistance (GMR) effects in the OSVs respectively
Regime in the OSVs [16,28,43], which correspond to the TMR and GMR effects in the OSVs
Summary
Organic spintronics is an emerging research field, within the broader field of spintronics and organic semiconductors (OSCs). OSV is one of the most popular devices for investigating spin dependent transport in OSCs. A general OSV has a sandwich structure with two ferromagnetic (FM) electrodes (with different coercive fields) which are separated by a nonmagnetic organic layer. A common way to detect organic-based spin dependent transport is the electrical measurement of magnetoresistance in these spin-valve structures. Materials 2018, 11, 721 detect organic-based spin dependent transport is the electrical measurement of magnetoresistance in these spin-valve structures. The resistance of the device can be switched by sweeping an external field, leading to leading a magnetic rotation of rotation the ferromagnetic layers, fromlayers, parallel to antiparallel. OSCs during injection and detection for can allow for spin manipulation This makes it possible for such devices to magnetically control spin manipulation. That hinder further performance enhancement in organic spin devicesspin is discussed
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