Planar organic spin valves using nanostructured Ni80Fe20 magnetic contacts

AlQahtani, Hadi; Bryan, Matthew T.; Hayward, Thomas J.; Hodges, Matthew P.; Im, Mi‐Young; Fischer, Peter; Grell, Martin; Allwood, D. A.

doi:10.1016/j.orgel.2013.11.009

Cited by 7 publications

(1 citation statement)

References 28 publications

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“…Beyond the case of mere charge injection, metal–organic interfaces are intensively discussed in the context of spin injection and spin transport in organic materials . This includes the spin valve magnetoresistance effect, the level alignment or hybridization of states between metal and organic semiconductor, the introduction of interface layers, or effects of structurally more complex interfaces as well as spin filtering properties and the role of hybridization of interface states for spin filtering . It is therefore interesting to study both theoretically and experimentally the behavior of hot electrons/hot spins at such interfaces.…”

Section: Introductionmentioning

confidence: 99%

Hot Electrons and Hot Spins at Metal–Organic Interfaces

Arnold

Atxabal

Parui

et al. 2017

Adv Funct Materials

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A model is developed to describe the electron transport properties of hot electron devices based on organic semiconductors. For the first time, the simulations cover all the different processes the carriers experience in the device, which allows disentangling various effects on the transport characteristics. The model is compared to experimental measurements and excellent agreement is found. In addition, the model includes the electron spin and is thus able to describe a hot spin transistor. In this device, a spatial variation of the spin diffusion length is found, which scales inversely proportional to the variation of the electron density. The spin current can be increased by increasing the hot electron energy and by decreasing the image charge barrier without changing the spin diffusion length. Unprecedented insight into the effect of interfacial disorder at the metal-organic interface on charge and spin transport is provided. Finally, conditions are established, where majority and minority spin carriers propagate in opposite directions, increasing the spin current relative to the charge current and the occurrence of pure spin currents is analyzed.

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Section: Introductionmentioning

confidence: 99%

Hot Electrons and Hot Spins at Metal–Organic Interfaces

Arnold

Atxabal

Parui

et al. 2017

Adv Funct Materials

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Investigations of the polymer/magnetic interface of organic spin-valves

Morley

Dost

Lingam

et al. 2015

Applied Surface Science

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Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/) eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. AbstractThis work investigates the top interface of an organic spin-valve, to determine the interactions between the polymer and top magnetic electrode. The polymers studied are regio-regular poly(3-hexylthiophene) (RR-P3HT) and poly(2,5-bis(3-hexadecylthiophen-2-yl)thieno[3,2-b]thiophene (PBTTT) and the magnetic top electrodes are NiFe and Fe. X-ray photoelectron spectroscopy (XPS) is used to determine the bonding at the interface, along with the extent of how oxidised the magnetic layers are, while atomic force microscopy (AFM) is used to determine the surface roughness. A magneto-optic Kerr effect (MOKE) magnetometer is used to study the magnetic properties of the top electrode. It is shown that at the organic-magnetic interface the magnetic atoms interact with the polymer, as metallic-sulphide and metallic-carbide species are present at the interface. It is also shown that the structure of the polymer influences the anisotropy of the magnetic electrode, such that the magnetic electrodes grown on RR-P3HT have uniaxial anisotropy, while those grown on PBTTT are isotropic.

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Controlled magnetic behaviour of Ni80Fe20 nanowire by a selection of nucleation pads

Alrwais

AlQahtani

2020

Journal of King Saud University - Science

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Planar organic spin valves using nanostructured Ni80Fe20 magnetic contacts

Cited by 7 publications

References 28 publications

Hot Electrons and Hot Spins at Metal–Organic Interfaces

Hot Electrons and Hot Spins at Metal–Organic Interfaces

Investigations of the polymer/magnetic interface of organic spin-valves

Controlled magnetic behaviour of Ni80Fe20 nanowire by a selection of nucleation pads

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