Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to ferromagnetic Co films

Klar, D.; Brena, Barbara; Herper, Heike C.; Bhandary, Sumanta; Weis, C.; Krumme, B.; Schmitz‐Antoniak, Carolin; Sanyal, Biplab; Eriksson, Olle; Wende, Heiko

doi:10.1103/physrevb.88.224424

Cited by 42 publications

(50 citation statements)

References 53 publications

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“…The reduction of the absolute value of the exchange energy when O is intercalated between TbPc 2 and Ni is not unexpected, as it is observed also for planar molecules, e.g., for FeOEP on O/Ni relative to bare Ni [30]. However, in all single phthalocyanine and porphyrin systems investigated to date, O intercalation leads to a change of sign of the coupling, from FM to AFM [19,22,26,30]. For TbPc 2 , instead, we find that the out-of-plane coupling remains AFM, whereas the in-plane coupling turns positive but with a large error bar.…”

Section: Tbpc 2 On Li-and O-modified Ni Filmsmentioning

confidence: 63%

Coupling of single, double, and triple-decker metal-phthalocyanine complexes to ferromagnetic and antiferromagnetic substrates

et al. 2014

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Section: Tbpc 2 On Li-and O-modified Ni Filmsmentioning

confidence: 63%

Coupling of single, double, and triple-decker metal-phthalocyanine complexes to ferromagnetic and antiferromagnetic substrates

et al. 2014

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“…When the Co substrate is previously oxidated, the magnetic moment of the deposited FePc is coupled antiferromagnetically to the susbstrate, but its moment remains in the S = 1 state. 16 In this case, DFT calculations (GGA+U) also lead to predicted values of m Fe which are too high with respect to the experimental values. 39 At any rate, one concludes, on one hand, that the degree of hybridization with the substrate depends strongly on the substrate metal and, on the other hand, that DFT methods predict only qualitatively the observed magnetic moments of Fe in the FePc molecule.…”

Section: Discussionmentioning

confidence: 87%

Reversible Fe Magnetic Moment Switching in Catalytic Oxygen Reduction Reaction of Fe-Phthalocyanine Adsorbed on Ag(110)

Bartolomé

Brookes

et al. 2015

J. Phys. Chem. C

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The consequences of the evolution of the active site in the oxygen reduction reaction catalyzed by iron phthalocyanine (FePc) submonolayers deposited on the Ag(110) surface are explored. The capacity of reversibly and sharply switching the magnetic state of FePc molecules by chemical means is conclusively evidenced by X-ray magnetic circular dichroism (XMCD) at the Fe L2,3 absorption edge. In the molecular oxygen-dosed phase, oxygen intercalates between the molecule and the surface, thereby switching the Fe magnetic moment from a nearly negligible (mTot exp ≈ 0.26(1) μB) to an order of magnitude larger value (mTot exp ≈ 2.1(2) μB). Moreover, the characteristic XMCD spectrum undergoes a crossover from metallic to oxidized Fe(III)-like line shape, in accordance with an oxygen-induced decoupling of the molecular electronic states from the underlying metal surface. The FePc acts as a reversible bifunctional chemical− magnetic switch at the atomic monolayer scale

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“…This enlightens a different adsorption mechanism in comparison to the FeP described in the previous section, where the hybridization with the surface mainly involved the N atoms. Moreover, the Fe-N bonding lengths are not strongly changed when the FePc are adsorbed, with calculated values of 1.97 Å in comparison to experimental values of 1.93 Å [10]. The adsorbed FePc is in the intermediate spin state (S = 1) as in the gas phase.…”

Section: Magnetic Coupling Mechanisms Between Molecule and Substratementioning

confidence: 57%

“…The magnetic coupling of SMM with magnetic surfaces has been studied for the iron phthalocyanine (FePc) [10,11]. The FePc is a more stable molecule and can be easily purchased with a large variety of central atoms.…”

Section: Magnetic Coupling Mechanisms Between Molecule and Substratementioning

confidence: 99%

Deposited Transition Metal‐Centered Porphyrin and Phthalocyanine Molecules: Influence of the Substrates on the Magnetic Properties

Herper¹,

Brena²,

Bhandary³

et al. 2017

Phthalocyanines and Some Current Applications

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The field of molecular spintronics has gained much attention since molecules withmagnetic centers form natural magnetic units, which do not suffer from the size limitations of conventional electronics, opening a new path towards miniaturization. To fabricate devices, the molecules have to be deposited on a substrate. The key questions are the interaction of the molecules with the substrate and the control of the magnetic properties. Considering molecule-substrate hybrid interfaces as building blocks for spintronic devices, a deep understanding of the electronic structure and the coupling mechanisms is central to future applications. The orientation and reconstruction of the substrates can strongly affect the electronic and magnetic characteristics of the adsorbed molecule and drastically change the properties of the free molecules. In this chapter, we will discuss the interaction of transition metal-centered porphyrins and phthalocyanines with different types of substrates, for example, ferromagnetic transition metals or graphene sheets, in the framework of state-of-the-art density functional theory methods plus insights gained from X-ray absorption/X-ray magnetic circular dichroism experiments. The goal is to give an insight into the relevant processes on the atomic scale and to present possible routes to tailor magnetic properties in moleculesubstrate hybrid structures.

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Oxygen-tuned magnetic coupling of Fe-phthalocyanine molecules to ferromagnetic Co films

Cited by 42 publications

References 53 publications

Coupling of single, double, and triple-decker metal-phthalocyanine complexes to ferromagnetic and antiferromagnetic substrates

Coupling of single, double, and triple-decker metal-phthalocyanine complexes to ferromagnetic and antiferromagnetic substrates

Reversible Fe Magnetic Moment Switching in Catalytic Oxygen Reduction Reaction of Fe-Phthalocyanine Adsorbed on Ag(110)

Deposited Transition Metal‐Centered Porphyrin and Phthalocyanine Molecules: Influence of the Substrates on the Magnetic Properties

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