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Multiferroic iron oxide thin films at room-temperature
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Gich, Marti, Fina, Ignasi, Morelli, Alessio, Sánchez, Florencio, Alexe, M. (Marin), Gazquez, Jaume, Fontcuberta, Josep and Roig, Anna (2014) Multiferroic iron oxide thin films at room-temperature. Advanced Materials, Volume 26 (Number 27). Article number 4645. doi:10.1002/adma.201400990 ISSN 0935-9648.
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Official URL: http://dx.doi.org/10.1002/adma.201400990
Abstract
In spite of being highly relevant for the development of a new generation of information storage devices, not many single-phase materials displaying magnetic and ferroelectric orders above room temperature are known. Moreover, these uncommon materials typically display insignificant values of the remanent moment in one of the ferroic orders or are complex multicomponent oxides which will be very challenging to integrate in devices. Here we report on the strategy to stabilize the metastable e-Fe2O3 in thin film form, and we show that besides its already known ferrimagnetic nature, the films are also ferroelectric at 300 K with a remanent polarization of 1 μC/cm2. The film polarization shows long retention times and can be switched under small applied voltages. These characteristics make of e-Fe2O3 the first single-ion transition-metaloxide which is ferro(ferri)magnetic and ferroelectric at room temperature. The simple composition of this new multiferroic oxide and the discovery of a robust path for its thin film growth may boost the exploitation of e-Fe2O3 in novel devices.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QC Physics | ||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Library of Congress Subject Headings (LCSH): | Iron oxides, Ferroelectric thin films, Ferrimagnetism | ||||||||
Journal or Publication Title: | Advanced Materials | ||||||||
Publisher: | Wiley - V C H Verlag GmbH & Co. KGaA | ||||||||
ISSN: | 0935-9648 | ||||||||
Official Date: | 14 July 2014 | ||||||||
Dates: |
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Volume: | Volume 26 | ||||||||
Number: | Number 27 | ||||||||
Article Number: | Article number 4645 | ||||||||
DOI: | 10.1002/adma.201400990 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 28 December 2015 | ||||||||
Date of first compliant Open Access: | 28 December 2015 | ||||||||
Funder: | Spain, Catalonia (Spain), European Cooperation in the Field of Scientific and Technical Research (Organization) (COST) | ||||||||
Grant number: | MAT2012-35324 (Spain), MAT2011-29269-CO3 (Spain), CONSOLIDER-Nanoselect-CSD2007-00041 (Spain), RyC-2012-11709 (Spain), RyC-2009-04335 (Spain), 2009SGR203 (Cat), 2009SGR00376 (Cat), 2011BP-A00220 (Cat), PCIG09-GA-2011–294168 (EC), MP1202 (COST) |
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