Magnetic Bistability in a Submonolayer of Sublimated Fe<sub>4</sub> Single-Molecule Magnets

Malavolti, Luigi; Lanzilotto, Valeria; Ninova, Silviya; Poggini, Lorenzo; Cimatti, Irene; Cortigiani, Brunetto; Margheriti, L.; Chiappe, Daniele; Otero, Edwige; Sainctavit, Philippe; Totti, Federico; Cornia, Andrea; Mannini, Matteo; Sessoli, Roberta

doi:10.1021/nl503925h

Cited by 67 publications

(111 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…28,34 Furthermore, this hampers the assembly of the molecules in ordered two-dimensional superstructures. 34 Here, we present a successful fabrication of self-organized arrays of Fe 4 by using hexagonal boron nitride (h-BN) on…”

mentioning

confidence: 99%

Highly Ordered Surface Self-Assembly of Fe₄ Single Molecule Magnets

Erler

Schmitt²,

Barth

et al. 2015

Nano Lett.

View full text Add to dashboard Cite

Single molecule magnets (SMMs) have attracted considerable attention due to low-temperature magnetic hysteresis and fascinating quantum effects. The investigation of these properties requires the possibility to deposit well-defined monolayers or spatially isolated molecules within a well-controlled adsorption geometry. Here we present a successful fabrication of self-organized arrays of Fe4 SMMs on hexagonal boron nitride (h-BN) on Rh(111) as template. Using a rational design of the ligand shell optimized for surface assembly and electrospray as a gentle deposition method, we demonstrate how to obtain ordered arrays of molecules forming perfect hexagonal superlattices of tunable size, from small islands to an almost perfect monolayer. High-resolution low temperature scanning tunneling microscopy (STM) reveals that the Fe4 molecule adsorbs on the substrate in a flat geometry, meaning that its magnetic easy axis is perpendicular to the surface. By scanning tunneling spectroscopy (STS) and density functional theory (DFT) calculations, we infer that the majority- and minority-spin components of the spin-split lowest unoccupied molecular orbital (LUMO) can be addressed separately on a submolecular level.

show abstract

mentioning

confidence: 99%

Highly Ordered Surface Self-Assembly of Fe₄ Single Molecule Magnets

Erler

Schmitt²,

Barth

et al. 2015

Nano Lett.

View full text Add to dashboard Cite

show abstract

“…For the high-current regime we may approximate Γ ±3/2,±1/2 by Eqs. (24) and (38) for the twodimensional and three-dimensional cases, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…34 Single-molecule magnets have been shown to preserve their magnetic properties, including long magnetic lifetimes, when adsorbed on conducting surfaces. [35][36][37][38][39] The mechanism by which an applied electrical current at the surface of a TI can be used to switch the orientation of a molecular magnet is best illustrated using the example of a localized spin 1/2 coupled to the edge of a two-dimenstional topological insulator. [40][41][42] The electronic state at the edge of a two-dimensional TI is helical, so that electrons moving in opposite directions have opposite spin.…”

Section: Introductionmentioning

confidence: 99%

Current-induced switching of magnetic molecules on topological insulator surfaces

Locane

Brouwer

2017

Phys. Rev. B

View full text Add to dashboard Cite

Electrical currents at the surface or edge of a topological insulator are intrinsically spin-polarized. We show that such surface/edge currents can be used to switch the orientation of a molecular magnet weakly coupled to the surface or edge of a topological insulator. For the edge of a two-dimensional topological insulator as well as for the surface of a three-dimensional topological insulator the application of a well-chosen surface/edge current can lead to a complete polarization of the molecule if the molecule's magnetic anisotropy axis is appropriately aligned with the current direction. For a generic orientation of the molecule a nonzero but incomplete polarization is obtained. We calculate the probability distribution of the magnetic states and the switching rates as a function of the applied current.

show abstract

“…The calculated average distance between the Fe c (mass center) of different molecules along all the trajectory and averaged on all the possible couples shows to be in very good agreement with the average one measured between the spherical objects present in the STM images and associated with the Fe 4 Ph molecules. 20 Moreover, in order to verify how much regular the (Fig. 3a).…”

Section: Full Monolayer (Fm) Scenario -Mm Structural Characterizationmentioning

confidence: 99%

The disclosure of mesoscale behaviour of a 3d-SMM monolayer on Au(111) through a multilevel approach

et al. 2018

Self Cite

View full text Add to dashboard Cite

a Here we present a computational study of a full-and a half-monolayer of a Fe 4 single molecule magnet ([Fe 4 (L) 2 (dpm) 6 ], where H 3 L = 2-hydroxymethyl-2-phenylpropane-1,3-diol and Hdpm = dipivaloylmethane, Fe 4 Ph) on an unreconstructed surface of Au(111). This has been possible through the application of an integrated approach, which allows the explicit inclusion of the packing effects in the classical dynamics to be used in a second step in periodic and non-periodic high level DFT calculations. In this way we can obtain access to mesoscale geometrical data and verify how they can influence the magnetic properties of interest of the single Fe 4 molecule. The proposed approach allows to overcome the ab initio state-of-the-art approaches used to study Single Molecule Magnets (SMMs), which are based on the study of one single adsorbed molecule and cannot represent effects on the scale of a monolayer. Indeed, we show here that it is possible to go beyond the computational limitations inherent to the use, for such complex systems, of accurate calculation techniques (e.g. ab initio molecular dynamics) without losing the level of accuracy necessary to gain new detailed insights, hardly reachable at the experimental level. Indeed, long-range and edge effects on the Fe 4 structures and their easy axis of magnetization orientations have been evidenced as their different contributions to the overall macroscopic behavior.

show abstract

Magnetic Bistability in a Submonolayer of Sublimated Fe₄ Single-Molecule Magnets

Cited by 67 publications

References 46 publications

Highly Ordered Surface Self-Assembly of Fe₄ Single Molecule Magnets

Highly Ordered Surface Self-Assembly of Fe₄ Single Molecule Magnets

Current-induced switching of magnetic molecules on topological insulator surfaces

The disclosure of mesoscale behaviour of a 3d-SMM monolayer on Au(111) through a multilevel approach

Contact Info

Product

Resources

About

Magnetic Bistability in a Submonolayer of Sublimated Fe4 Single-Molecule Magnets

Cited by 67 publications

References 46 publications

Highly Ordered Surface Self-Assembly of Fe4 Single Molecule Magnets

Highly Ordered Surface Self-Assembly of Fe4 Single Molecule Magnets

Current-induced switching of magnetic molecules on topological insulator surfaces

The disclosure of mesoscale behaviour of a 3d-SMM monolayer on Au(111) through a multilevel approach

Contact Info

Product

Resources

About

Magnetic Bistability in a Submonolayer of Sublimated Fe₄ Single-Molecule Magnets

Highly Ordered Surface Self-Assembly of Fe₄ Single Molecule Magnets

Highly Ordered Surface Self-Assembly of Fe₄ Single Molecule Magnets