Spin-lattice coupling in multiferroic Pb(Fe1/2Nb1/2)O3 thin films

W. Peng; N. Lemée; M. Karkut; B. Dkhil; V. V. Shvartsman; P. Borisov; W. Kleemann; J. Holc; M. Kosec; R. Blinc

doi:10.1063/1.3067872

Spin-lattice coupling in multiferroic Pb(Fe1/2Nb1/2)O3 thin films

Materials Science 2009-11-13 v1

Authors: W. Peng , N. Lemée , M. Karkut , B. Dkhil , V. V. Shvartsman , P. Borisov , W. Kleemann , J. Holc , M. Kosec , R. Blinc

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Abstract

We have made magnetization and x-ray diffraction measurements on an epitaxial Pb(Fe1/2Nb1/2)O3 200 nm film. From the temperature dependence of the out-of-plane lattice parameter we can assign a Burns' temperature at Td ~ 640 K, a temperature at T* ~ 510 K, related to the appearance of static polar nanoregions, and an anomaly occurring at 200 K. The latter is precisely the N\'eel temperature TN determined from magnetization and points to spin-lattice coupling at TN ~ 200 K. We also observe "weak ferromagnetism" up to 300K and propose superantiferromagnetic clusters as a plausible scenario to explain this hysteresis above TN.

Keywords

magnetic materials and spin systems thin films heisenberg spin chains

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@article{arxiv.0902.4897,
  title  = {Spin-lattice coupling in multiferroic Pb(Fe1/2Nb1/2)O3 thin films},
  author = {W. Peng and N. Lemée and M. Karkut and B. Dkhil and V. V. Shvartsman and P. Borisov and W. Kleemann and J. Holc and M. Kosec and R. Blinc},
  journal= {arXiv preprint arXiv:0902.4897},
  year   = {2009}
}

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12 pages, 4 figures

Spin-lattice coupling in multiferroic Pb(Fe1/2Nb1/2)O3 thin films

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