Matches in SemOpenAlex for { <https://semopenalex.org/work/W2187546552> ?p ?o ?g. }
Showing items 1 to 71 of
71
with 100 items per page.
- W2187546552 abstract "A comparative study of the results of Raman spectroscopy and Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy, along with in-field critical current density determinations, was performed to ascertain the structural changes associated with low levels of nickel doping in polycrystalline YBa2Cu3O7-δ (YBCO). Four samples were doped with molar-proportional percentages (0.32%, 0.64%, 0.96%, and 3.3%) of Ni (nickel) replacing the Cu (copper) in the starting materials, along with a control sample of pure YBCO. The Raman spectra were collected over multiple averaged scans with a GaAs PMT and a Triax 550 spectrometer equipped with a holographic Super-Notch Plus filter and were excited with 150 mW of 514.5 nm argon-ion laser radiation at the sample surface. The Raman studies indicated the increasing presence of NiO impurity in the sample as the doping level increased, but also clearly indicated that some of the Ni substitutes in the Cu sites of the Cu-O chains in the material, breaking their symmetry and allowing them to become Raman-active. This finding is especially significant in view of the fact that earlier studies in the literature have been inconclusive as to the exact site of the substituting Ni atoms. This effect is largest in the sample with the lowest dopant level (0.32%), which also demonstrated the optimal enhancement of the in-field transport critical current density for the lower field ranges. The EXAFS spectra were collected using the Advanced Photon Source (APS) at Argonne National laboratory, and exhibited little, if any detectable changes in the local atomic structure across the three lowest doped samples, but did exhibit a peak of increasing intensity with higher doping levels that indicated the increasing presence of NiO impurities, and delineating the reason for the drastic reduction in critical current densities for the larger nickel doping levels." @default.
- W2187546552 created "2016-06-24" @default.
- W2187546552 creator A5020981514 @default.
- W2187546552 date "2002-01-01" @default.
- W2187546552 modified "2023-09-27" @default.
- W2187546552 title "RAMAN AND EXAFS STUDIES OF LOW-NICKEL SUBSTITUTION" @default.
- W2187546552 cites W2049022617 @default.
- W2187546552 cites W430131757 @default.
- W2187546552 hasPublicationYear "2002" @default.
- W2187546552 type Work @default.
- W2187546552 sameAs 2187546552 @default.
- W2187546552 citedByCount "0" @default.
- W2187546552 crossrefType "journal-article" @default.
- W2187546552 hasAuthorship W2187546552A5020981514 @default.
- W2187546552 hasConcept C107861141 @default.
- W2187546552 hasConcept C113196181 @default.
- W2187546552 hasConcept C119824511 @default.
- W2187546552 hasConcept C120665830 @default.
- W2187546552 hasConcept C121332964 @default.
- W2187546552 hasConcept C137637335 @default.
- W2187546552 hasConcept C185592680 @default.
- W2187546552 hasConcept C191897082 @default.
- W2187546552 hasConcept C191952053 @default.
- W2187546552 hasConcept C192562407 @default.
- W2187546552 hasConcept C40003534 @default.
- W2187546552 hasConcept C43617362 @default.
- W2187546552 hasConcept C49040817 @default.
- W2187546552 hasConcept C504270822 @default.
- W2187546552 hasConcept C57863236 @default.
- W2187546552 hasConceptScore W2187546552C107861141 @default.
- W2187546552 hasConceptScore W2187546552C113196181 @default.
- W2187546552 hasConceptScore W2187546552C119824511 @default.
- W2187546552 hasConceptScore W2187546552C120665830 @default.
- W2187546552 hasConceptScore W2187546552C121332964 @default.
- W2187546552 hasConceptScore W2187546552C137637335 @default.
- W2187546552 hasConceptScore W2187546552C185592680 @default.
- W2187546552 hasConceptScore W2187546552C191897082 @default.
- W2187546552 hasConceptScore W2187546552C191952053 @default.
- W2187546552 hasConceptScore W2187546552C192562407 @default.
- W2187546552 hasConceptScore W2187546552C40003534 @default.
- W2187546552 hasConceptScore W2187546552C43617362 @default.
- W2187546552 hasConceptScore W2187546552C49040817 @default.
- W2187546552 hasConceptScore W2187546552C504270822 @default.
- W2187546552 hasConceptScore W2187546552C57863236 @default.
- W2187546552 hasLocation W21875465521 @default.
- W2187546552 hasOpenAccess W2187546552 @default.
- W2187546552 hasPrimaryLocation W21875465521 @default.
- W2187546552 hasRelatedWork W1964135710 @default.
- W2187546552 hasRelatedWork W2008384897 @default.
- W2187546552 hasRelatedWork W2022215046 @default.
- W2187546552 hasRelatedWork W2044001630 @default.
- W2187546552 hasRelatedWork W2061822697 @default.
- W2187546552 hasRelatedWork W2115533641 @default.
- W2187546552 hasRelatedWork W2152474121 @default.
- W2187546552 hasRelatedWork W2186451570 @default.
- W2187546552 hasRelatedWork W2346052893 @default.
- W2187546552 hasRelatedWork W2470316824 @default.
- W2187546552 hasRelatedWork W2794693996 @default.
- W2187546552 hasRelatedWork W2801988794 @default.
- W2187546552 hasRelatedWork W2966616562 @default.
- W2187546552 hasRelatedWork W3014078507 @default.
- W2187546552 hasRelatedWork W3109053425 @default.
- W2187546552 hasRelatedWork W3167683576 @default.
- W2187546552 hasRelatedWork W3171382956 @default.
- W2187546552 hasRelatedWork W3171994918 @default.
- W2187546552 hasRelatedWork W3176332065 @default.
- W2187546552 hasRelatedWork W3207679771 @default.
- W2187546552 isParatext "false" @default.
- W2187546552 isRetracted "false" @default.
- W2187546552 magId "2187546552" @default.
- W2187546552 workType "article" @default.