Reversible Spin Polarization at Hybrid Organic–Ferromagnetic Interfaces

Wang, Yan; G., J.; Fry, J. N.; Cheng, Hai‐Ping

doi:10.1021/jz401800m

Cited by 19 publications

(20 citation statements)

References 34 publications

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“…In this regard, different methods to modulate the spin-chemistry of the adsorbed molecules are actively experimented. Some of these methods include a controlled adsorption and thermal desorption of axial ligands in switching the spin state of the TM center in adsorbed metal -porphyrins or -phthalocyanines, 28,59,60 strain induced switching in molecular magnets, 70 electrically induced switching in spin-crossover molecules, 9 photo-switching, 71 or electromagnetic switching 8 of molecular magnetism in adsorbed aromatic molecules. In the case of latter, such excitations modify molecular configuration on the surface 71 that weaken or switch sign of J S-Mol .…”

Section: B Molecular Sensor For Read and Write Operationmentioning

confidence: 99%

Interface-assisted molecular spintronics

Raman¹

2014

Applied Physics Reviews

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Section: B Molecular Sensor For Read and Write Operationmentioning

confidence: 99%

Interface-assisted molecular spintronics

Raman¹

2014

Applied Physics Reviews

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“…A recent work showed that azobenzene molecules have significant effects on spin polarization of organic-ferromagnetic interfaces. 21 In this paper, we show by computational studies that it is possible to effectively tune the magnetic properties of a nanoscale system by the decoration of a light-sensitive azobenzene based molecule.…”

mentioning

confidence: 94%

Reversible magnetism switching in graphene-based systems via the decoration of photochromic molecules

Nurbawono

Zhang

2013

Applied Physics Letters

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By first principles calculations, we demonstrate that when decorated with photochromic molecules, it is possible to use light to reversibly control the magnetic properties of a nanoscale magnetic system. The combination of a graphene-based magnetic system and a photochromic azobenzene molecule is chosen as a model system. The trans and cis isomers of the azobenzene molecule that can be converted between each other by means of photoexcitations are found to have drastically different effects on the magnetic properties of the system. The results may pave the way for the future design of light controllable molecular-scale spintronic devices.

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“…From the organic side the spinterface describes the spin filtering effects caused by the spin‐dependent hybridization of the organic and metallic orbitals, leading to different interfacial broadening (and hence transmissivity) of the localized organic states for the two spin channels . On the other hand, it has been shown both experimentally and theoretically that some organic molecules can affect the magnetic properties of the underlying magnetic surface, in terms of magnitude and direction of magnetic moments and spin polarization as well as of strength of exchange interactions. Moreover, coupling between the spins of transition‐metal based molecular magnets and magnetic surfaces can be obtained promoting surface‐induced magnetic ordering of the molecular layer and the possibility to switch the molecular spin orientation by switching the spin orientation of the surface .…”

Section: Introductionmentioning

confidence: 99%

An Organic Spin Valve Embedding a Self‐Assembled Monolayer of Organic Radicals

Poggini

Cucinotta

Pradipto³

et al. 2016

Adv Materials Inter

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merging classical and quantum behavior in a nanosized object. [1][2][3][4] From the applicative point of view, the use of magnetic molecules in spintronics can offer several advantages due to different aspects. On one side, molecular magnets have the functionality of carrying magnetic information down to the molecular size. This encourages the race toward miniaturization of magnetic devices as well as the exploitation of magnetic molecules for quantum computing, [5] although this solution is still hindered by the low working temperature. [6][7][8] On the other side, nonmagnetic molecular materials like organic semiconductors (OSCs) have been considered rather extensively during the past decade in the search for optimal combinations for prototypical devices in the area of spintronics technology, i.e., spin-valves. [9] The magnetoresistance in such devices, which consist of ferromagnetic metal electrodes sandwiching a semiconducting material, depends on the injection and transport of the spin through the semiconductor spacer. OSCs typically possess weak spin-orbit coupling and, because of this, they guarantee longer spin coherence time compared to both inorganic semiconductors and metals. In this context, different organic materials, such as pentacene [10] and tris(8-hydroxyquinoline) aluminium(III) (Alq 3 ) [11,12] and the gallium(III) analogue (Gaq 3 ), [13] have been employed in combination with several ferromagnetic metals, such as Fe and Co:TiO 2[10] or Co and La 0.7 Sr 0.3 MnO 3 (briefly termed LSMO). [11,12] The changes of physical properties of both the metal and organic molecule at the interface have also attracted great scientific interests, so that the ad hoc term spinterface [14,15] has been advanced to describe the topic. From the organic side the spinterface describes the spin filtering effects caused by the spin-dependent hybridization of the organic and metallic orbitals, leading to different interfacial broadening (and hence transmissivity) of the localized organic states for the two spin channels. [14] On the other hand, it has been shown both experimentally [16] and theoretically [17][18][19] that some organic molecules can affect the magnetic properties of the underlying magnetic surface, in terms of magnitude and direction of magnetic moments and spin polarization as well as of strength of exchange interactions. Moreover, coupling between the spins of transition-metal based molecular magnets and magnetic surfaces can be obtained promoting A novel functionalization of a ferromagnetic electrode employed in spintronic devices is reported. Self-assembling monolayer technique has been used to chemisorb a paramagnetic phosphonate functionalized nitronyl-nitroxide radical (NitPO) on the ferromagnetic La 0.7 Sr 0.3 MnO 3 (LSMO) manganite surface. This interfacial layer causes clearly detectable modifications of the behavior in prototypical LSMO/NitPO/Gaq 3 /AlOx/Co vertical spintronic devices at temperatures below the ferromagnetic alignment (estimated by density functional theory) of the magnetic mome...

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Reversible Spin Polarization at Hybrid Organic–Ferromagnetic Interfaces

Cited by 19 publications

References 34 publications

Interface-assisted molecular spintronics

Interface-assisted molecular spintronics

Reversible magnetism switching in graphene-based systems via the decoration of photochromic molecules

An Organic Spin Valve Embedding a Self‐Assembled Monolayer of Organic Radicals

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