Ferromagnetism and increased ionicity in epitaxially grown TbMnO3 films

D. Rubi; C. de Graaf; C. J. M. Daumont; D. Mannix; R. Broer; B. Noheda

doi:10.1103/PhysRevB.79.014416

Ferromagnetism and increased ionicity in epitaxially grown TbMnO3 films

Materials Science 2009-11-13 v1

Authors: D. Rubi , C. de Graaf , C. J. M. Daumont , D. Mannix , R. Broer , B. Noheda

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Abstract

Thin films of TbMnO3 have been grown on SrTiO3 substrates. The films grow under compressive strain and are only partially clamped to the substrate. This produces remarkable changes in the magnetic properties and, unlike the bulk material, the films display ferromagnetic interactions below the ordering temperature of ~40K. X-ray photoemission measurements in the films show that the Mn-3s splitting is 0.3eV larger than that of the bulk. Ab initio embedded cluster calculations yield Mn-3s splittings that are in agreement with the experiment and reveal that the larger observed values are due to a larger ionicity of the films.

Keywords

TbMnO3 thin films ferromagnetism ionicity epitaxial growth X-ray photoemission Mn-3s splitting ab initio calculations

Cite

@article{arxiv.0810.5137,
  title  = {Ferromagnetism and increased ionicity in epitaxially grown TbMnO3 films},
  author = {D. Rubi and C. de Graaf and C. J. M. Daumont and D. Mannix and R. Broer and B. Noheda},
  journal= {arXiv preprint arXiv:0810.5137},
  year   = {2009}
}

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REVTeX, 5 two-column pages, 4 EPS figures

Ferromagnetism and increased ionicity in epitaxially grown TbMnO3 films

Abstract

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