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Title: Role of composition, bond covalency, and short-range order in the disordering of stannate pyrochlores by swift heavy ion irradiation

Authors:
; ; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1295980
Grant/Contract Number:
SC0001089
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 6; Related Information: CHORUS Timestamp: 2016-08-16 11:15:22; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Tracy, Cameron L., Shamblin, Jacob, Park, Sulgiye, Zhang, Fuxiang, Trautmann, Christina, Lang, Maik, and Ewing, Rodney C.. Role of composition, bond covalency, and short-range order in the disordering of stannate pyrochlores by swift heavy ion irradiation. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.064102.
Tracy, Cameron L., Shamblin, Jacob, Park, Sulgiye, Zhang, Fuxiang, Trautmann, Christina, Lang, Maik, & Ewing, Rodney C.. Role of composition, bond covalency, and short-range order in the disordering of stannate pyrochlores by swift heavy ion irradiation. United States. doi:10.1103/PhysRevB.94.064102.
Tracy, Cameron L., Shamblin, Jacob, Park, Sulgiye, Zhang, Fuxiang, Trautmann, Christina, Lang, Maik, and Ewing, Rodney C.. 2016. "Role of composition, bond covalency, and short-range order in the disordering of stannate pyrochlores by swift heavy ion irradiation". United States. doi:10.1103/PhysRevB.94.064102.
@article{osti_1295980,
title = {Role of composition, bond covalency, and short-range order in the disordering of stannate pyrochlores by swift heavy ion irradiation},
author = {Tracy, Cameron L. and Shamblin, Jacob and Park, Sulgiye and Zhang, Fuxiang and Trautmann, Christina and Lang, Maik and Ewing, Rodney C.},
abstractNote = {},
doi = {10.1103/PhysRevB.94.064102},
journal = {Physical Review B},
number = 6,
volume = 94,
place = {United States},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevB.94.064102

Citation Metrics:
Cited by: 4works
Citation information provided by
Web of Science

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  • Experimental evidence of the changes of the short range order (SRO) in amorphous alloys due to high energy deposition in electronic processes related to the slowing down of swift heavy ions is presented. Modification of the local structure was studied by the specialized {open_quotes}rf-Moessbauer{close_quotes} technique in amorphous Fe{sub 40}Ni{sub 35}Si{sub 10}B{sub 15}, Fe{sub 73.5}Nb{sub 3}Cu{sub 1}Si{sub 13.5}B{sub 9}, Fe{sub 73.5}Nb{sub 4.5}Cr{sub 5}Cu{sub 1}B{sub 16}, and Fe{sub 80.5}Nb{sub 7}B{sub 12.5} alloys irradiated at low temperature with 6 GeV Pb ions. The changes of SRO were studied as a function of ion fluence (from 1{times}10{sup 11} to 2.4{times}10{sup 13}ions/cm{sup 2}) and electronicmore » energy deposition rate for the amorphous Fe{sub 40}Ni{sub 35}Si{sub 10}B{sub 15} alloy. The effects observed were interpreted in relation to the anisotropic growth of the amorphous samples. A novel effect consisting of partial surface crystallization induced by swift heavy ion irradiation was observed in the Fe{sub 90}Zr{sub 7}B{sub 3} alloy by conversion electron Moessbauer spectroscopy. {copyright} 2001 American Institute of Physics.« less
  • We report a structural study of the stuffed pyrochlore series Ln{sub 2}(Ti{sub 2-x}Ln{sub x})O{sub 7-x/2} (Ln=Ho, Yb; 0{<=}x{<=}0.67). Electron microscopy and Rietveld refinements of neutron powder diffraction data for the x=0.67 end members, Ho{sub 2}TiO{sub 5} and Yb{sub 2}TiO{sub 5}, reveal that small domains ({approx}50 A or less) exist where the Ln and Ti/Ln sublattices are pyrochlore like, while the average structure is fluorite like. Both the Ho and Yb stuffed pyrochlore series for 0.1{<=}x{<=}0.5 are shown to be a composite of long- and short-range-ordered pyrochlore phases. The relative fraction of long-range vs. short-range pyrochlore order decreases with increasing Lnmore » doping. An additional complex structural modulation of the pyrochlore structure is observed in electron diffraction and high-resolution electron microscopy images. - Graphical abstract: The <110> zone axis electron diffraction pattern for Ho{sub 2}TiO{sub 5} reveals the coexistence of long- and short-range pyrochlore ordering. An additional complex modulation of the pyrochlore structure consisting of a seven-fold enlargement of the unit cell in the (662) direction is also observed.« less
  • The SiO{sub x} layers different in composition (0 < x < 2) are irradiated with Xe ions with the energy 167 MeV and the dose 10{sup 14} cm{sup -2} to stimulate the formation of light-emitting Si nanostructures. The irradiation gives rise to a photoluminescence band with the parameters dependent on x. As the Si content is increased, the photoluminescence is first enhanced, with the peak remaining arranged near the wavelength {lambda} Almost-Equal-To 600 nm, and then the peak shifts to {lambda} Almost-Equal-To 800 nm. It is concluded that the emission sources are quantum-confined nanoprecipitates formed by disproportionation of SiO{sub x}more » in ion tracks due to profound ionization losses. Changes in the photoluminescence spectrum with increasing x are attributed firstly to the increase in the probability of formation of nanoprecipitates and then to the increase in their dimensions; the latter effect is accompanied with a shift of the emission band to longer wavelengths. The subsequent quenching of photoluminescence is interpreted as a result of the removal of quantum confinement in nanoprecipitates and their coagulation.« less