Hidden magnetic states emergent under electric field, in a room temperature composite magnetoelectric multiferroic

0484536 - FZÚ 2018 RIV GB eng J - Journal Article
Clarkson, J.D. - Fina, I. - Liu, Z.Q. - Lee, Y. - Kim, J. - Frontera, C. - Cordero, K. - Wisotzki, S. - Sánchez, F. - Sort, J. - Hsu, S.L. - Ko, C. - Aballe, L. - Foerster, M. - Wu, J. - Christen, H.M. - Heron, J.T. - Schlom, D. G. - Salahuddin, S. - Kioussis, N. - Fontcuberta, J. - Martí, Xavier - Ramesh, R.
Hidden magnetic states emergent under electric field, in a room temperature composite magnetoelectric multiferroic.
Scientific Reports. Roč. 7, č. 1 (2017), s. 1-7, č. článku 15460. ISSN 2045-2322. E-ISSN 2045-2322
R&D Projects: GA ČR GB14-37427G
Institutional support: RVO:68378271
Keywords : antiferromagnetic phase-transition * total-energy calculations * wave basis-set
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.122, year: 2017

The instability of ferroelectric ordering in ultra-thin films is one of the most important fundamental issues pertaining realization of a number of electronic devices with enhanced functionality, such as ferroelectric and multiferroic tunnel junctions or ferroelectric field effect transistors. In this paper, we investigate the polarization state of archetypal ultrathin (several nanometres) ferroelectric heterostructures: epitaxial single-crystalline BaTiO3 films sandwiched between the most habitual perovskite electrodes, SrRuO3, on top of the most used perovskite substrate, SrTiO3. We use a combination of piezoresponse force microscopy, dielectric measurements and structural characterization to provide conclusive evidence for the ferroelectric nature of the relaxed polarization state in ultrathin BaTiO3 capacitors.

Permanent Link: http://hdl.handle.net/11104/0279708