Magnetic and dielectric properties of YbMnO3 perovskite thin films

Details Magnetic and dielectric properties of YbMnO3 perovskite thin films Magnetic and dielectric properties of YbMnO3 perovskite thin films

2008-07-10

arxiv.org/abs/0807.1653v1

Physics

Condensed Matter

Materials Science

RevTEX. 4 two-column pages, 5 figures. To appear in PRB-Rapids

Scientific paper

10.1103/PhysRevB.78.020408

Metastable manganite perovskites displaying the antiferromagnetic so-called E-phase are predicted to be multiferroic. Due to the need of high-pressures for the synthesis of this phase, this prediction has only been confirmed in bulk HoMnO3. Here we report on the growth and characterization of YbMnO3 perovskite thin films grown under epitaxial strain. Highly-oriented thin films, with thickness down to ~30nm, can be obtained showing magneto-dielectric coupling and magnetic responses as those expected for the E-phase. We observe that the magnetic properties depart from the bulk behavior only in the case of ultrathin films (d< 30nm), which display a glassy magnetic behavior. We show that strain effects alone cannot account for this difference and that the film morphology plays, instead, a crucial role.

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