Lattice dynamics of the heavy Fermion compound UBe/sub 13/

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UBe/sub 3/ has unusual electronic and magnetic properties due to a narrow band of U 5f states near the Fermi energy. We have used EXAFS to compare the interatomic forces in UBe/sub 13/ with those in ThBe/sub 13/, which has the same structure but no 5f electrons. From measurements made over the range 10 to 308 K, we have determined the temperature dependences of the mean square relative displacements (MSRD's) for the first actinide-beryllium and actinide-actinide shells in each material. The MSRD's for the corresponding shells in the two compounds were found to be quite similar. The thermal motion of ... continued below

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Pages: 6

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Tranquada, J.M.; Heald, S.M.; Pick, M.A.; Fisk, Z. & Smith, J.L. January 1, 1986.

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UBe/sub 3/ has unusual electronic and magnetic properties due to a narrow band of U 5f states near the Fermi energy. We have used EXAFS to compare the interatomic forces in UBe/sub 13/ with those in ThBe/sub 13/, which has the same structure but no 5f electrons. From measurements made over the range 10 to 308 K, we have determined the temperature dependences of the mean square relative displacements (MSRD's) for the first actinide-beryllium and actinide-actinide shells in each material. The MSRD's for the corresponding shells in the two compounds were found to be quite similar. The thermal motion of the nearest-neighbor actinide-actinide pairs is shown to be due entirely to a single Einstein mode, the square of whose frequency is proportional to the actinide-Be force constant. We conclude that the presence or absence of 5f electrons on the actinide has very little effect on the actinide-beryllium bonding. 9 refs., 5 figs.

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Pages: 6

Notes

NTIS, PC A02/MF A01.

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  • International conference on EXAFS and near edge structure, Saumur, France, 7 Jul 1986

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  • Other: DE86014774
  • Report No.: BNL-38396
  • Report No.: CONF-860753-5
  • Grant Number: AC02-76CH00016
  • Grant Number: AS05-80ER10742
  • Office of Scientific & Technical Information Report Number: 5314124
  • Archival Resource Key: ark:/67531/metadc1065148

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1986

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  • Feb. 4, 2018, 10:51 a.m.

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  • March 27, 2018, 6:46 p.m.

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Tranquada, J.M.; Heald, S.M.; Pick, M.A.; Fisk, Z. & Smith, J.L. Lattice dynamics of the heavy Fermion compound UBe/sub 13/, article, January 1, 1986; United States. (digital.library.unt.edu/ark:/67531/metadc1065148/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.