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dc.contributor.authorCOEY, JOHN MICHAEL DAVID
dc.date.accessioned2009-08-11T15:00:35Z
dc.date.available2009-08-11T15:00:35Z
dc.date.issued1981
dc.date.submitted1981en
dc.identifier.citationG Czjzek, J Fink, F Gotz, H Schmidt, J M D Coey, J P Rebouillat and A Lienard 'Atomic coordination and the distribution of electric field gradients in amorphous solids' in Physical Review B, 23, (6), 1981, pp 2513-2530en
dc.identifier.otherYen
dc.identifier.otherY
dc.identifier.urihttp://hdl.handle.net/2262/31648
dc.descriptionPUBLISHEDen
dc.description.abstractThe observation of nuclear quadrupole interactions in amorphous solids provides a unique possibility of obtaining information about the angular distribution of local ionic coordinations, complementary to the information about radial distributions deduced from x-ray and neutron diffraction and from extended x-ray absorption fine structure measurements. In the present paper the relation between ionic coordinations and the distribution of electric field gradients (EFG) is investigated. It is shown that the distribution function P(Vzz,?) of the splitting parameters Vzz (the electric field gradient) and ? (the asymmetry parameter) in general yields zero probability both for Vzz=0 and for ?=0. For solids which are isotropic on the average, the distribution function of the components Vik of the EFG tensor depends only on two variables, the invariant functions of the tensor components [Det(Vik) and ?Vik2]. Expressions for these quantities in terms of the radial coordinates of the ions causing the EFG and of the bond angles between pairs of ions are given. For amorphous solids with random ionic coordination an analytic approximation for the distribution function P(Vzz,?) is derived. This function is strongly dominated by the distribution of ions in the first coordination shell. The results are applied to the analysis of Mossbauer spectra of 155Gd in amorphous Gd-Ni alloys.en
dc.format.extent2513-2530en
dc.format.extent3110866 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseries23en
dc.relation.ispartofseries6en
dc.rightsYen
dc.subjectPhysicsen
dc.titleAtomic coordination and the distribution of electric field gradients in amorphous solidsen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/jcoey


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