[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki19\/europiumii-oxide-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki19\/europiumii-oxide-wikipedia\/","headline":"Europium(II) oxide – Wikipedia","name":"Europium(II) oxide – Wikipedia","description":"before-content-x4 From Wikipedia, the free encyclopedia after-content-x4 Chemical compound Europium(II) oxide (EuO) is a chemical compound which is one of","datePublished":"2022-01-12","dateModified":"2022-01-12","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki19\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki19\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","url":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","height":"1","width":"1"},"url":"https:\/\/wiki.edu.vn\/en\/wiki19\/europiumii-oxide-wikipedia\/","about":["Wiki"],"wordCount":2293,"articleBody":"     (adsbygoogle = window.adsbygoogle || []).push({});before-content-x4From Wikipedia, the free encyclopedia       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Chemical compoundEuropium(II) oxide (EuO) is a chemical compound which is one of the oxides of europium. In addition to europium(II) oxide, there is also europium(III) oxide and the mixed valence europium(II,III) oxide.       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4Table of ContentsPreparation[edit]Properties[edit]Applications[edit]References[edit]Preparation[edit]Europium(II) oxide can be prepared by the reduction of Europium(III) oxide with elemental europium at 800\u00b0C and subsequent vacuum distillation at 1150\u00b0C.[2]Eu2O3 + Eu \u2192 3 EuOIt is also possible to synthesize from the reaction of europium oxychloride and lithium hydride.[3]       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x42 EuOCl + 2 LiH \u2192 2 EuO + 2 LiCl + H2In modern research, thin films can be manufactured by molecular beam epitaxy directly from europium atoms and oxygen molecules. These films have contamination of Eu3+ of less than 1%.[4][5]Properties[edit]Europium(II) oxide is a violet compound as a bulk crystal and transparent blue in thin film form. It is unstable in humid atmosphere, slowly turning into the yellow europium(II) hydroxide hyrdrate and then to white europium(III) hydroxide.[3] EuO crystallizes in a cubic sodium chloride structure with a lattice paramater a = 0.5144 nm. The compound is often non-stoichiometric, containing up to 4% Eu3+ and small amounts of elemental europium.[6] However, since 2008 high purity crystaline EuO films can be created in ultra high vacuum conditions. These films have a crystallite size of about 4 nm.[citation needed]Europium(II) oxide is ferromagnetic with a Curie Temperature of 69.3 K. With the addition of about 5-7% elemental europium, this increases to 79 K.[2] It also displays colossal magnetoresistance, with a dramatic increase in conductivity below the Curie temperature. One more way to increase the Curie temperature is doping with gadolinium, holmium, or lanthanum.[6]Europium(II) oxide is a semiconductor with a band gap of 1.12 eV.[6]Applications[edit]Because of the properties of europium(II) oxide, thin layers of the oxide deposited on silicon are being studied for use as spin filters. Spin filter materials only allow electrons of a certain spin to pass, blocking electrons of the opposite spin.[7]References[edit]^ McGill, Ian (2000-06-15), “Rare Earth Elements”, Ullmann’s Encyclopedia of Industrial Chemistry, Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, doi:10.1002\/14356007.a22_607, ISBN\u00a03527306730^ a b Shafer, M. W. (1965). “Preparation and Crystal Chemistry of Divalent Europium Compounds”. Journal of Applied Physics. AIP Publishing. 36 (3): 1145\u20131152. Bibcode:1965JAP….36.1145S. doi:10.1063\/1.1714142. ISSN\u00a00021-8979.^ a b Baudler, Marianne (1978). Handbuch der pr\u00e4parativen anorganischen Chemie (in German). Stuttgart: Enke. p.\u00a01092. ISBN\u00a03-432-87813-3. OCLC\u00a0310719490.^ Sutarto, R.; Altendorf, S. G.; Coloru, B.; Moretti Sala, M.; Haupricht, T.;  et\u00a0al. (2009-05-21). “Epitaxial and layer-by-layer growth of EuO thin films on yttria-stabilized cubic zirconia (001) using MBE distillation”. Physical Review B. 79 (20): 205318. arXiv:0902.0330. Bibcode:2009PhRvB..79t5318S. doi:10.1103\/physrevb.79.205318. ISSN\u00a01098-0121. S2CID\u00a097016104.^ Altendorf, S. G.; Efimenko, A.; Oliana, V.; Kierspel, H.; Rata, A. D.; Tjeng, L. H. (2011-10-28). “Oxygen off-stoichiometry and phase separation in EuO thin films”. Physical Review B. American Physical Society (APS). 84 (15): 155442. Bibcode:2011PhRvB..84o5442A. doi:10.1103\/physrevb.84.155442. ISSN\u00a01098-0121.^ a b c Santos, Tiffany S. (2008-11-10). Europium oxide as a perfect electron spin filter. DSpace@MIT Home (Thesis). Massachusetts Institute of Technology. hdl:1721.1\/39538. Retrieved 2022-01-23.^ Caspers, C.; M\u00fcller, M.; Gray, A. X.; Kaiser, A. M.; Gloskovskii, A.; Fadley, C. S.; Drube, W.; Schneider, C. M. (2011-10-12). “Electronic structure of EuO spin filter tunnel contacts directly on silicon” (PDF). Physica Status Solidi RRL. Wiley. 5 (12): 441\u2013443. Bibcode:2011PSSRR…5..441C. doi:10.1002\/pssr.201105403. ISSN\u00a01862-6254. S2CID\u00a022764388.       (adsbygoogle = window.adsbygoogle || []).push({});after-content-x4"},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki19\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki19\/europiumii-oxide-wikipedia\/#breadcrumbitem","name":"Europium(II) oxide – Wikipedia"}}]}]