Emerging nanomagnetism in 4d transition metal nanowires

Details Emerging nanomagnetism in 4d transition metal nanowires Emerging nanomagnetism in 4d transition metal nanowires

2004-01-27

arxiv.org/abs/cond-mat/0401559v2

J. Phys. Condens. Matter 16, 8061 (2004)

Physics

Condensed Matter

Materials Science

5 figures, 17 pages New content with respect to old arxiv version

Scientific paper

10.1088/0953-8984/16/45/028

Monatomic nanowires of the nonmagnetic transition metals Ru, Rh, and Pd have been studied theoretically, using first-principles computational techniques, in order to investigate the possible onset of magnetism in these nanosystems. Our fully relativistic spin-polarized all-electron density functional calculations reveal the onset of Hund's rule magnetism in nanowires of all three metals, with mean-field moments of 1.1, 0.3, and 0.7 bohr magnetons, respectively, at the equilibrium bond length. An analysis of the band structures indicates that the nanocontact superparamagnetic state suggested by our calculations should affect the ballistic conductance between tips made of Ru, Rh or Pd, leading to possible temperature and magnetic field dependent conductance.

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