Magnetic properties of free cobalt and gadolinium clusters

Douglass, D. C.; Cox, A. J.; Bucher, J. P.; Bloomfield, L. A.

doi:10.1103/physrevb.47.12874

Cited by 232 publications

(133 citation statements)

References 13 publications

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“…These trends show minima at specific magic number cluster sizes which have been observed in previous measurements on Gd, Tb, and Dy clusters ͑only N = 22 was observed for Gd͒. 8,[13][14][15][16] The com- 09B509-2mon trend across these four elements ͑Gd, Dy, Tb, and Ho͒ suggests that these clusters have a common geometric structure like the bulk materials. The reduced moments of the magic number clusters can be most simply explained by a canted or antiferromagnetic arrangement of the 4f moments.…”

Section: Discussionsupporting

confidence: 50%

Size dependent magnetic moments and electric polarizabilities of free Tb, Ho, and Tm clusters

Bowlan

Dijk

Kirilyuk

et al. 2010

Journal of Applied Physics

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Stern-Gerlach deflection measurements have been performed on rare earth clusters Tb N , Ho N , and Tm N ͑N Յ 40͒ at cryogenic temperatures ͑T Յ 77 K͒. Tb N and Ho N share a common size dependence in their magnetic moments. They both exhibit common "magic number" sizes which show reduced net magnetic moments, similar to previous observations for Gd and Dy clusters. Tm N have smaller magnetic moments that do not differ significantly between cluster sizes. The reduced net magnetic moments are evidence that the atomic moments are canceled by a canted or antiferromagnetic alignment. Electric deflection experiments reveal that Tm N have electric dipole moments and show an enhanced response to an electric field compared to Tb N and Ho N .

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Section: Discussionsupporting

confidence: 50%

Size dependent magnetic moments and electric polarizabilities of free Tb, Ho, and Tm clusters

Bowlan

Dijk

Kirilyuk

et al. 2010

Journal of Applied Physics

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“…The reduced critical exponent for the ultrathin films is consistent with the magnetic behavior observed in free Gd clusters by Douglass et al 17,18 Gd clusters of different sizes exhibit very similar magnetic moments per atom ͑although substantially reduced from that of the bulk gadolinium value͒. More importantly the Curie temperatures of these small Gd N clusters (Nϭ10-92) are even larger than that of bulk gadolinium.…”

Section: T C ͑ ϱ ͒ϫTsupporting

confidence: 72%

Finite size scaling in the thin film limit

Waldfried

Welipitiya

McAvoy

et al. 1998

Journal of Applied Physics

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The thickness dependent spin-polarized electronic structure of strained thin and ultrathin films of Gd is characterized by a distinct change in the critical exponent λ in the formalism of finite size scaling. The reduced critical exponent in the ultrathin films can be correlated to the increased dominance of the surface magnetic structure and the increasing paramagnetic-like behavior of the bulk.

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“…Magnetic properties of transition metal clusters have become the subject of intensive research, both from the experimental [1][2][3][4] and theoretical point of view [5][6][7][8] . One of the most interesting and challenging aspects of that field is the subtle interplay between geometric structure and magnetic ordering which has mostly been investigated for ferromagnetic 3d-clusters and 4d-clusters.…”

Section: Introductionmentioning

confidence: 99%

Noncollinear magnetic ordering in small chromium clusters

Kohl

Bertsch

1999

Phys. Rev. B

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We investigate noncollinear effects in antiferromagnetically coupled clusters using the general, rotationally invariant form of local spin-density theory. The coupling to the electronic degrees of freedom is treated with relativistic non-local pseudopotentials and the ionic structure is optimized by Monte-Carlo techniques. We find that small chromium clusters (N ≤ 13) strongly favor noncollinear configurations of their local magnetic moments due to frustration. This effect is associated with a significantly lower total magnetization of the noncollinear ground states, ameliorating the disagreement between Stern-Gerlach measurements and previous collinear calculations for Cr12 and Cr13. Our results further suggest that the trend to noncollinear configurations might be a feature common to most antiferromagnetic clusters.

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Magnetic properties of free cobalt and gadolinium clusters

Cited by 232 publications

References 13 publications

Size dependent magnetic moments and electric polarizabilities of free Tb, Ho, and Tm clusters

Size dependent magnetic moments and electric polarizabilities of free Tb, Ho, and Tm clusters

Finite size scaling in the thin film limit

Noncollinear magnetic ordering in small chromium clusters

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