Strongly Enhanced Curie Temperature in Carbon-Doped Mn5Ge3 Films

M. Gajdzik; C. Suergers; M. Kelemen; H. v. Loehneysen

doi:10.1016/S0304-8853(00)00494-7

Strongly Enhanced Curie Temperature in Carbon-Doped Mn5Ge3 Films

Materials Science 2009-10-31 v2

Authors: M. Gajdzik , C. Suergers , M. Kelemen , H. v. Loehneysen

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Abstract

The structural and magnetic properties of Mn5Ge3Cx films prepared at elevated substrate temperatures TS are investigated. In particular, films with x >= 0.5 and TS = 680 K exhibit a strongly enhanced Curie temperature TC = 440 K compared to Mn5Ge3 with TC = 304 K. Structural analysis of these films suggests that the carbon is interstitially incorporated into the voids of Mn octahedra of the hexagonal Mn5Si3-type structure giving rise to a lattice compression. The enhanced ferromagnetic stability in connection with the lattice compression is interpreted in terms of an Mn-Mn interaction mediated by C based on a change in the electronic structure.

Keywords

Curie temperature carbon-doped Mn5Ge3 lattice compression ferromagnetic stability

Cite

@article{arxiv.cond-mat/9905280,
  title  = {Strongly Enhanced Curie Temperature in Carbon-Doped Mn5Ge3 Films},
  author = {M. Gajdzik and C. Suergers and M. Kelemen and H. v. Loehneysen},
  journal= {arXiv preprint arXiv:cond-mat/9905280},
  year   = {2009}
}

Comments

4 pages, 3 figures, minor changes in text

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