Magnetoelastic coupling in La0.7Ca0.3MnO 3/BaTiO3 ultrathin films

A. Alberca, N. M. Nemes, F. J. Mompean, T. Fehér, F. Simon, J. Tornos, C. Leon, C. Munuera, B. J. Kirby, M. R. Fitzsimmons, A. Hernando, J. Santamaria, M. Garcia-Hernandez

Research output: Contribution to journalArticle

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Abstract

The magnetism of La0.7Ca0.3MnO3 (LCMO) epitaxial thin films grown on SrTiO3 (STO) and BaTiO3 (BTO) substrates is studied using polarized neutron reflectometry (PNR) and ferromagnetic resonance (FMR) techniques. In LCMO/BTO, PNR reveals a strongly suppressed magnetization of 300 kA/m, equivalent to a magnetic moment of 2 μB/Mn, throughout the LCMO layer, amounting to half the expected value. The largest suppression occurs near the interface with BTO, with magnetization values of 50 kA/m, equivalent to 0.3 μB/Mn. FMR is observable at 8.9 GHz only around the [110] crystallographic direction in thin LCMO/BTO. The resonance barely shifts as the applied field is rotated away from [110]. The FMR results are analyzed in terms of magnetoelastic anisotropy and compared to LCMO/STO grown under the same conditions. A two-layer magnetization model is proposed, based on strong out-of-plane anisotropy near the BTO interface and shown to qualitatively explain the main characteristics of the FMR results.

Original languageEnglish
Article number134410
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number13
DOIs
Publication statusPublished - Oct 11 2013

Fingerprint

Ferromagnetic resonance
Ultrathin films
ferromagnetic resonance
Magnetization
magnetization
Neutrons
Anisotropy
neutrons
anisotropy
Epitaxial films
Magnetism
Magnetic moments
magnetic moments
retarding
Thin films
shift
Substrates
thin films
strontium titanium oxide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Magnetoelastic coupling in La0.7Ca0.3MnO 3/BaTiO3 ultrathin films. / Alberca, A.; Nemes, N. M.; Mompean, F. J.; Fehér, T.; Simon, F.; Tornos, J.; Leon, C.; Munuera, C.; Kirby, B. J.; Fitzsimmons, M. R.; Hernando, A.; Santamaria, J.; Garcia-Hernandez, M.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 88, No. 13, 134410, 11.10.2013.

Research output: Contribution to journalArticle

Alberca, A, Nemes, NM, Mompean, FJ, Fehér, T, Simon, F, Tornos, J, Leon, C, Munuera, C, Kirby, BJ, Fitzsimmons, MR, Hernando, A, Santamaria, J & Garcia-Hernandez, M 2013, 'Magnetoelastic coupling in La0.7Ca0.3MnO 3/BaTiO3 ultrathin films', Physical Review B - Condensed Matter and Materials Physics, vol. 88, no. 13, 134410. https://doi.org/10.1103/PhysRevB.88.134410
Alberca, A. ; Nemes, N. M. ; Mompean, F. J. ; Fehér, T. ; Simon, F. ; Tornos, J. ; Leon, C. ; Munuera, C. ; Kirby, B. J. ; Fitzsimmons, M. R. ; Hernando, A. ; Santamaria, J. ; Garcia-Hernandez, M. / Magnetoelastic coupling in La0.7Ca0.3MnO 3/BaTiO3 ultrathin films. In: Physical Review B - Condensed Matter and Materials Physics. 2013 ; Vol. 88, No. 13.
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