Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Iron-based_superconductor> ?p ?o }
- Iron-based_superconductor abstract "Iron-based superconductors (FeSC) are iron-containing chemical compounds whose superconducting properties were discovered in 2006.In 2008, led by recently discovered iron pnictide compounds (originally known as oxypnictides), they were in the first stages of experimentation and implementation. (Previously most high-temperature superconductors were cuprates and being based on layers of copper and oxygen sandwiched between other substances (La, Ba, Hg)).This new type of superconductors is based instead on conducting layers of iron and a pnictide (chemical elements in group 15 of the periodic table, here typically arsenic (As) and phosphorus (P)) and seems to show promise as the next generation of high temperature superconductors.Much of the interest is because the new compounds are very different from the cuprates and may help lead to a theory of non-BCS-theory superconductivity.More recently these have been called the ferropnictides. The first ones found belong to the group of oxypnictides. Some of the compounds have been known since 1995, and their semiconductive properties have been known and patented since 2006.It has also been found that some iron chalcogens superconduct; for example, undoped β-FeSe can have a critical temperature (Tc) of 8 K at normal pressure, and 36.7 K under high pressure.A subset of iron-based superconductors with properties similar to the oxypnictides, known as the 122 iron arsenides, attracted attention in 2008 due to their relative ease of synthesis.The oxypnictides such as LaOFeAs are often referred to as the '1111' pnictides.The crystalline material, known chemically as LaOFeAs, stacks iron and arsenic layers, where the electrons flow, between planes of lanthanum and oxygen. Replacing up to 11 percent of the oxygen with fluorine improved the compound — it became superconductive at 26 kelvin, the team reports in the March 19, 2008 Journal of the American Chemical Society. Subsequent research from other groups suggests that replacing the lanthanum in LaOFeAs with other rare earth elements such as cerium, samarium, neodymium and praseodymium leads to superconductors that work at 52 kelvin.Iron pnictide superconductors crystallize into the [FeAs] layered structure alternating with spacer or charge reservoir block. The compounds can thus be classified into “1111” system RFeAsO (R: the rare earth element) including LaFeAsO, SmFeAsO, PrFeAsO, etc.; “122” type BaFe2As2, SrFe2As2 or CaFe2As2; “111” type LiFeAs, NaFeAs, and LiFeP. Doping or applied pressure will transform the compounds into superconductors.Compounds such as Sr2ScFePO3 discovered in 2009 are referred to as the '42622' family, as FePSr2ScO3. Noteworthy is the synthesis of (Ca4Al2O6-y)(Fe2Pn2) (or Al-42622(Pn); Pn = As and P) using high-pressure synthesis technique. Al-42622(Pn) exhibit superconductivity for both Pn = As and P with the transition temperatures of 28.3 K and 17.1 K, respectively. The a-lattice parameters of Al-42622(Pn) (a = 3.713 Å and 3.692 Å for Pn = As and P, respectively) are smallest among the iron-pnictide superconductors. Correspondingly, Al-42622(As) has the smallest As-Fe-As bond angle (102.1°) and the largest As distance from the Fe planes (1.5 Å). High-pressure technique also yields (Ca3Al2O5-y)(Fe2Pn2) (Pn = As and P), the first reported iron-based superconductors with the perovskite-based '32522' structure. The transition temperature (Tc) is 30.2 K for Pn = As and 16.6 K for Pn = P. The emergence of superconductivity is ascribed to the small tetragonal a-axis lattice constant of these materials. From these results, an empirical relationship was established between the a-axis lattice constant and Tc in iron-based superconductors.In 2009, it was shown that undoped iron pnictides had a magnetic quantum critical point deriving from competition between electronic localization and itinerancy.".
- Iron-based_superconductor thumbnail LnFePnOFstructure.png?width=300.
- Iron-based_superconductor wikiPageExternalLink 1006.4618.
- Iron-based_superconductor wikiPageExternalLink 2012_LTP_Kordyuk.pdf.
- Iron-based_superconductor wikiPageExternalLink 025003.
- Iron-based_superconductor wikiPageID "17382375".
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- Iron-based_superconductor wikiPageRevisionID "678421725".
- Iron-based_superconductor wikiPageWikiLink 122_iron_arsenide.
- Iron-based_superconductor wikiPageWikiLink Andreev_reflection.
- Iron-based_superconductor wikiPageWikiLink Antiferromagnetism.
- Iron-based_superconductor wikiPageWikiLink Arsenic.
- Iron-based_superconductor wikiPageWikiLink BCS-theory.
- Iron-based_superconductor wikiPageWikiLink BCS_theory.
- Iron-based_superconductor wikiPageWikiLink Category:Superconductors.
- Iron-based_superconductor wikiPageWikiLink Cerium.
- Iron-based_superconductor wikiPageWikiLink Chalcogen.
- Iron-based_superconductor wikiPageWikiLink Charge-transfer_complex.
- Iron-based_superconductor wikiPageWikiLink Charge_transfer_complex.
- Iron-based_superconductor wikiPageWikiLink Chemical_element.
- Iron-based_superconductor wikiPageWikiLink Color_superconductivity.
- Iron-based_superconductor wikiPageWikiLink Composite_Reaction_Texturing.
- Iron-based_superconductor wikiPageWikiLink Composite_reaction_texturing.
- Iron-based_superconductor wikiPageWikiLink Conventional_superconductor.
- Iron-based_superconductor wikiPageWikiLink Copper.
- Iron-based_superconductor wikiPageWikiLink Covalent_superconductor.
- Iron-based_superconductor wikiPageWikiLink Covalent_superconductors.
- Iron-based_superconductor wikiPageWikiLink Critical_field.
- Iron-based_superconductor wikiPageWikiLink Cuprate.
- Iron-based_superconductor wikiPageWikiLink Fluorine.
- Iron-based_superconductor wikiPageWikiLink Group_(periodic_table).
- Iron-based_superconductor wikiPageWikiLink High-temperature_superconductivity.
- Iron-based_superconductor wikiPageWikiLink High-temperature_superconductor.
- Iron-based_superconductor wikiPageWikiLink Homess_law.
- Iron-based_superconductor wikiPageWikiLink Iron.
- Iron-based_superconductor wikiPageWikiLink Kelvin.
- Iron-based_superconductor wikiPageWikiLink Kondo_effect.
- Iron-based_superconductor wikiPageWikiLink Lanthanum.
- Iron-based_superconductor wikiPageWikiLink Little-Parks_effect.
- Iron-based_superconductor wikiPageWikiLink Little–Parks_effect.
- Iron-based_superconductor wikiPageWikiLink Magnetic_sail.
- Iron-based_superconductor wikiPageWikiLink National_Superconducting_Cyclotron_Laboratory.
- Iron-based_superconductor wikiPageWikiLink Neodymium.
- Iron-based_superconductor wikiPageWikiLink Oxygen.
- Iron-based_superconductor wikiPageWikiLink Oxypnictide.
- Iron-based_superconductor wikiPageWikiLink Periodic_table.
- Iron-based_superconductor wikiPageWikiLink Phase_diagram.
- Iron-based_superconductor wikiPageWikiLink Phosphorus.
- Iron-based_superconductor wikiPageWikiLink Pnictide.
- Iron-based_superconductor wikiPageWikiLink Pnictogen.
- Iron-based_superconductor wikiPageWikiLink Praseodymium.
- Iron-based_superconductor wikiPageWikiLink Proximity_effect_(superconductivity).
- Iron-based_superconductor wikiPageWikiLink Room-temperature_superconductor.
- Iron-based_superconductor wikiPageWikiLink Room_temperature_superconductor.
- Iron-based_superconductor wikiPageWikiLink Rutherford_cable.
- Iron-based_superconductor wikiPageWikiLink Samarium.
- Iron-based_superconductor wikiPageWikiLink Spallation_Neutron_Source.
- Iron-based_superconductor wikiPageWikiLink Spin-density_wave.
- Iron-based_superconductor wikiPageWikiLink Spin_density_wave.
- Iron-based_superconductor wikiPageWikiLink Superconducting_RF.
- Iron-based_superconductor wikiPageWikiLink Superconducting_radio_frequency.
- Iron-based_superconductor wikiPageWikiLink Superconductivity.
- Iron-based_superconductor wikiPageWikiLink Superconductor_classification.
- Iron-based_superconductor wikiPageWikiLink Superconductors.
- Iron-based_superconductor wikiPageWikiLink Superfluid_film.
- Iron-based_superconductor wikiPageWikiLink Technological_applications_of_superconductivity.
- Iron-based_superconductor wikiPageWikiLink Tesla_(unit).
- Iron-based_superconductor wikiPageWikiLink Timeline_of_low-temperature_technology.
- Iron-based_superconductor wikiPageWikiLink Type-II_superconductor.
- Iron-based_superconductor wikiPageWikiLink Type-I_superconductor.
- Iron-based_superconductor wikiPageWikiLink Unconventional_superconductor.
- Iron-based_superconductor wikiPageWikiLink Upper_critical_field.
- Iron-based_superconductor wikiPageWikiLink File:LnFePnOFstructure.png.
- Iron-based_superconductor wikiPageWikiLink File:Phase_diagram_of_the_122_family_of_ferro-pnictides.png.
- Iron-based_superconductor wikiPageWikiLinkText "Fe based superconductors".
- Iron-based_superconductor wikiPageWikiLinkText "Iron-based superconductor".
- Iron-based_superconductor wikiPageWikiLinkText "iron-based compounds".
- Iron-based_superconductor wikiPageWikiLinkText "iron-based superconductor".
- Iron-based_superconductor wikiPageWikiLinkText "iron-based superconductors".
- Iron-based_superconductor hasPhotoCollection Iron-based_superconductor.
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- Iron-based_superconductor subject Category:Superconductors.
- Iron-based_superconductor hypernym Compounds.
- Iron-based_superconductor type Article.
- Iron-based_superconductor type ChemicalCompound.
- Iron-based_superconductor type Article.
- Iron-based_superconductor type Substance.
- Iron-based_superconductor type Superconductor.
- Iron-based_superconductor comment "Iron-based superconductors (FeSC) are iron-containing chemical compounds whose superconducting properties were discovered in 2006.In 2008, led by recently discovered iron pnictide compounds (originally known as oxypnictides), they were in the first stages of experimentation and implementation.".
- Iron-based_superconductor label "Iron-based superconductor".
- Iron-based_superconductor sameAs 鉄系超伝導物質.
- Iron-based_superconductor sameAs m.047p92z.