Document Detail

Thick lead-free ferroelectric films with high Curie temperatures through nanocomposite-induced strain.
MedLine Citation:
PMID:  21725306     Owner:  NLM     Status:  Publisher    
Ferroelectric materials are used in applications ranging from energy harvesting to high-power electronic transducers. However, industry-standard ferroelectric materials contain lead, which is toxic and environmentally unfriendly. The preferred alternative, BaTiO(3), is non-toxic and has excellent ferroelectric properties, but its Curie temperature of ∼130 °C is too low to be practical. Strain has been used to enhance the Curie temperature of BaTiO(3) (ref. 4) and SrTiO(3) (ref. 5) films, but only for thicknesses of tens of nanometres, which is not thick enough for many device applications. Here, we increase the Curie temperature of micrometre-thick films of BaTiO(3) to at least 330 °C, and the tetragonal-to-cubic structural transition temperature to beyond 800 °C, by interspersing stiff, self-assembled vertical columns of Sm(2)O(3) throughout the film thickness. The columns, which are 10 nm in diameter, strain the BaTiO(3) matrix by 2.35%, forcing it to maintain its tetragonal structure and resulting in the highest BaTiO(3) transition temperatures so far.
Sophie A Harrington; Junyi Zhai; Sava Denev; Venkatraman Gopalan; Haiyan Wang; Zhenxing Bi; Simon A T Redfern; Seung-Hyub Baek; Chung W Bark; Chang-Beom Eom; Quanxi Jia; Mary E Vickers; Judith L Macmanus-Driscoll
Related Documents :
12237096 - The stability during low-temperature storage of an antifreeze protein isolated from the...
14697246 - Methyl jasmonate treatments reduce chilling injury and activate the defense response of...
19290476 - Fructan and its relationship to abiotic stress tolerance in plants.
12770036 - Effect of freeze temperature on ice formation and long-term survival of the woolly bear...
19924646 - The early endosome: a busy sorting station for proteins at the crossroads.
8955326 - Electron microscopic evaluation of a two-step theory of pore formation by streptolysin o.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-7-03
Journal Detail:
Title:  Nature nanotechnology     Volume:  -     ISSN:  1748-3395     ISO Abbreviation:  -     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-7-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101283273     Medline TA:  Nat Nanotechnol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Materials Science, University of Cambridge, Cambridge, CB2 3QZ, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Interfacial phase-change memory.
Next Document:  A transition zone complex regulates mammalian ciliogenesis and ciliary membrane composition.