Flux requirements for the growth of RFeAsO (R = rare earth) superconductors

dc.contributor.author Yan, J.-Q.
dc.contributor.author Lograsso, Thomas
dc.contributor.author Jensen, Brandt
dc.contributor.author Dennis, Kevin
dc.contributor.author McCallum, R.
dc.contributor.author Lograsso, Thomas
dc.contributor.department Ames Laboratory
dc.date 2018-02-13T15:06:54.000
dc.date.accessioned 2020-06-29T23:25:14Z
dc.date.available 2020-06-29T23:25:14Z
dc.date.copyright Sat Jan 01 00:00:00 UTC 2011
dc.date.embargo 2013-09-24
dc.date.issued 2011-02-16
dc.description.abstract <p>Millimeter-sized LaFeAsO single crystals have been successfully grown out of NaAs flux starting with (LaAs+1/2Fe<sub>2</sub>O<sub>3</sub>):20NaAs. The factors which allow the growth of these crystals out of NaAs but not out of many other fluxes, such as FeAs, have been investigated. X-ray powder diffraction found that NaAs synthesized for the growth of<em>R</em>FeAsO superconductors has monoclinic LiAs structure. Thermal analysis confirmed that NaAs melts congruently at about 600 °C. The ability to extract <em>R</em>FeAsO crystals from this NaAs flux suggests that NaAs has a significant oxygen solubility, possibly due to the formation of the ternary compound NaAsO<sub>2</sub>, and enough oxygen diffusivity to transport solute to the growth front. Oxygen solubility and diffusivity are two important factors in searching for an alternative environmentally benign flux for the growth of <em>R</em>FeAsOsuperconductors.</p>
dc.description.comments <p>The following article appeared in <em>Applied Physics Letters</em> 98 (2011): 072504 and can be found at <a href="http://dx.doi.org/10.1063/1.3555632" target="_blank">http://dx.doi.org/10.1063/1.3555632</a>.</p>
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dc.identifier archive/lib.dr.iastate.edu/ameslab_pubs/121/
dc.identifier.articleid 1115
dc.identifier.contextkey 4617713
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_pubs/121
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/7662
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ameslab_pubs/121/2011_YanJQ_FluxRequirementsGrowth.pdf|||Fri Jan 14 19:12:31 UTC 2022
dc.source.uri 10.1063/1.3555632
dc.subject.disciplines Condensed Matter Physics
dc.subject.disciplines Metallurgy
dc.subject.keywords Materials Science and Engineering
dc.subject.keywords crystal growth from melt
dc.subject.keywords crystal structure
dc.subject.keywords diffusion
dc.subject.keywords iron compounds
dc.subject.keywords lanthanum compounds
dc.subject.keywords solubility
dc.subject.keywords superconducting materials
dc.subject.keywords X-ray diffraction
dc.title Flux requirements for the growth of RFeAsO (R = rare earth) superconductors
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 316ee29f-99a9-49bc-a048-0f43caf97aa5
relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
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