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Multiferroics that are both ferroelectric and ferromagnetic at room temperature

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Multiferroic articles including highly resistive, strongly ferromagnetic strained thin films of BiFe.sub.0.5Mn.sub.0.5O.sub.3 ("BFMO") on (001) strontium titanate and Nb-doped strontium titanate substrates were prepared. The films were tetragonal with high epitaxial quality and phase purity. The magnetic moment and coercivity values at room temperature were 90 emu/cc (H=3 kOe) and 274 Oe, respectively. The magnetic transition temperature was strongly enhanced up to approximately 600 K, which is approximately 500 K higher than for pure bulk BiMnO.sub.3.
Driscoll, Judith L. (US), Jia, Quanxi (Los Alamos, NM)
13/ 199,595
September 1, 2011
STATEMENT REGARDING FEDERAL RIGHTS [0002] This invention was made with government support under Contract No. DE-AC52-06NA25396 awarded by the U.S. Department of Energy. The government has certain rights in the invention.