Monometallofullerene<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi><mml:mi>m</mml:mi><mml:mo>@</mml:mo><mml:mi>C</mml:mi></mml:mrow><mml:mrow><mml:mn>82</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>: Proof of an Encapsulated Divalent Tm Ion by High-Energy Spectroscopy

Pichler, Thomas; Golden, M. S.; Knupfer, M.; Fink, J.; Kirbach, U.; Kuráň, Pavel; Dunsch, Lothar

doi:10.1103/physrevlett.79.3026

Cited by 83 publications

(55 citation statements)

References 27 publications

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“…Interestingly, the bonding and formal valency of the R ions also depend on the number of encaged ions: Thus, X-ray angle-resolved near-edge spectroscopy (XANES) spectra revealed that Tm is trivalent in Tm 2 @C 82 whereas it is divalent in Tm@C 82 [3,4]. The divalent state, unexpected for this R ion, was also concluded from photoemission and high-energy spectroscopy data [5,6]. A complex behaviour was found for Sc k @C 82 (k ¼ 1; 2, 3): As Takata et al [7] reported, Sc is divalent for k ¼ 1 or 2, whereas for k ¼ 3 the whole trimer is trivalent, (Sc 3 ) 3+ .…”

Section: Introductionmentioning

confidence: 87%

Magnetic moments in Ho3N@C80 and Tb3N@C80

Wolf

Müller

Eckert

et al. 2005

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 87%

Magnetic moments in Ho3N@C80 and Tb3N@C80

Wolf

Müller

Eckert

et al. 2005

Journal of Magnetism and Magnetic Materials

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“…High energy spectroscopy has been proven to be a key tool to understand the complicated interplay between charge transfer and hybridisation in these molec-ular hybrid systems. For instance, for metallofullerenes, this allowed for the first time to observe of a purely ionic charge transfer and to unravel the stabilization of rare earth ions with unconventional valency was established in the case of Tm@C 82 [7]. On the other hand for dimetallofullerenes and trimetalnitride fullerenes such as Sc2@C 84 and Dy 3 N@C 80 the encaged metals are not purely 2+ viz.…”

Section: Introductionmentioning

confidence: 93%

Bonding environment and electronic structure of Gd metallofullerene and Gd nanowire filled single‐wall carbon nanotubes

Pichler

Kramberger

Ayala

et al. 2008

Physica Status Solidi (b)

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Being single‐walled carbon nanotubes, archetypical 1D systems with peculiar anisotropic electronic properties, it is possible to infer modifications in a controlled manner by filling their inner hollow space. One successful approach was proposed for Gd, which regards filling with metallofullerenes and a successful transformation into different novelmetal nanowires by a versatile nanochemical reaction. In this contribution we report on a combined high resolution photoemission and X‐ray absorption study on Gd@C82 peapods and Gd nanowires.From a detailed analysis of the Gd 4d response and the valence band in photoemission we are able to elucidate the changes in the bonding environment and charge transfer in these 1D systems. We observe a clear modification of the low energy electronic properties of the SWCNT by the filling with Gd nanowires. Our findings provide important input to understand the interplay between charge transfer and hyridisation in the nanochemical processes in these hybrid systems and to elucidate their electronic transport properties regarding their application potential in nanoelectronic devices. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…Moreover, although most of the bulk elemental RE metals are trivalent, Tm forms divalent as well as trivalent and intermediate valence compounds. X-ray absorption and photoemission studies show that divalent Tm atoms are found not only in the gas phase [70], but also in rare gas matrices [71], endohedral fullerenes [72], and at low-coordinated surface sites of Tm films evaporated at low temperature [73]. Here, we find no significant difference in the XAS line shape of isolated adatoms compared to the ML sample, indicating that Tm atoms on W(110) have a stable 4f 12 ground state, which we attribute to the gain in cohesive energy of the 4f 12 5d 1 6s 2 configuration compared to the 4f 13 5d 0 6s 2 configuration [74] for Tm atoms adsorbed on a 5d metal [69].…”

Section: Electronic Ground Statementioning

confidence: 99%

Structure and magnetism of Tm atoms and monolayers on W(110)

et al. 2014

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We investigated the growth and magnetic properties of Tm atoms and monolayers deposited on a W(110) surface using scanning tunneling microscopy and x-ray magnetic circular and linear dichroism. The equilibrium structure of Tm monolayer films is found to be a strongly distorted hexagonal lattice with a Moiré pattern due to the overlap with the rectangular W(110) substrate. Monolayer as well as isolated Tm adatoms on W present a trivalent ground-state electronic configuration, contrary to divalent gas phase Tm and weakly coordinated atoms in quench-condensed Tm films. Ligand field multiplet simulations of the x-ray absorption spectra further show that Tm has a |J = 6,J z = ±5 electronic ground state separated by a few meV from the next lowest substates |J = 6,J z = ±4 and |J = 6,J z = ±6 . Accordingly, both the Tm atoms and monolayer films exhibit large spin and orbital moments with out-of-plane uniaxial magnetic anisotropy. X-ray magnetic dichroism measurements as a function of temperature show that the Tm monolayers develop antiferromagnetic correlations at about 50 K. The triangular structure of the Tm lattice suggests the presence of significant magnetic frustration in this system, which may lead to either a noncollinear staggered spin structure or intrinsic disorder.

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MonometallofullereneTm@C82: Proof of an Encapsulated Divalent Tm Ion by High-Energy Spectroscopy

Abstract: Monometallofullerene Tm@C82: proof of an encapsulated divalent Tm ion by high energy spectroscopy Pichler, T.; Golden, M.S.; Knupfer, M.; Fink, J.; Kirbach, U.; Kuran, P.; Dunsch, L.

Cited by 83 publications

References 27 publications

Magnetic moments in Ho3N@C80 and Tb3N@C80

Magnetic moments in Ho3N@C80 and Tb3N@C80

Bonding environment and electronic structure of Gd metallofullerene and Gd nanowire filled single‐wall carbon nanotubes

Structure and magnetism of Tm atoms and monolayers on W(110)

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