Ferromagnetism and ferroelectricity in epitaxial BiMnO{sub 3} ultra-thin films
- CNR-SPIN, Complesso Monte S. Angelo, Via Cintia, 80126 Napoli (Italy)
- Dipartimento di Fisica, Università “Federico II” di Napoli, Complesso Monte S. Angelo, Via Cintia, 80126 Napoli (Italy)
- Département de Physique de la Matière Condensée, Université de Genève, 24 Quai Ernest Ansermet, 1211 Geneva 4 (Switzerland)
We studied the ferroelectric and ferromagnetic properties of compressive strained and unstrained BiMnO{sub 3} thin films grown by rf-magnetron sputtering. BiMnO{sub 3} samples exhibit a two-dimensional cube-on-cube growth mode and a pseudo-cubic structure up to a thickness of 15 nm and of 25 nm when deposited on (001) SrTiO{sub 3} and (110) DyScO{sub 3}, respectively. Above these thicknesses, we observe a switching to a three-dimensional island growth mode and a simultaneous structural change to a (00l) oriented monoclinic unit cell. While ferromagnetism is observed below a T{sub C} ≈ 100 K for all samples, signatures of room temperature ferroelectricity were found only in the pseudo-cubic ultra-thin films, indicating a correlation between electronic and structural orders.
- OSTI ID:
- 22218214
- Journal Information:
- Applied Physics Letters, Vol. 103, Issue 6; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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