Curling spin density and orbital structures in a magnetic vortex core of an Fe quantum dot

Kohji Nakamura, Tomonori Ito, Arthur J Freeman

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

First results of the spin and orbital structures in the vortex core of an Fe dot obtained using highly precise first principles calculations that include intra-atomic noncollinear magnetism are reported. We demonstrate that a curling magnetic structure is stabilized within a 4 nm radius dot as inferred from spin-polarized scanning tunneling microscopy experiments in which the spin directions close to the center of the dot turn up along the perpendicular orientation to the curling plane-and also predict a complicated curling intra-atomic noncollinear magnetism near the center in which the spin moments continuously cant in circular directions on a smaller length scale inside the atoms. Importantly, these rotation properties in the spin density couple to the orbital motion and induce orbital moments oriented perpendicular to the curling plane, which is a first prediction of quantum phenomena induced in the nanoscale vortex core.

Original languageEnglish
Article number180404
Pages (from-to)1804041-1804044
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number18
Publication statusPublished - Nov 2003

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Magnetism
Semiconductor quantum dots
Vortex flow
quantum dots
vortices
orbitals
Magnetic structure
Scanning tunneling microscopy
Atoms
moments
Experiments
scanning tunneling microscopy
Direction compound
slopes
orbits
radii
predictions
atoms

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Curling spin density and orbital structures in a magnetic vortex core of an Fe quantum dot. / Nakamura, Kohji; Ito, Tomonori; Freeman, Arthur J.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 68, No. 18, 180404, 11.2003, p. 1804041-1804044.

Research output: Contribution to journalArticle

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