Nanoscale structure in AgSbTe2 determined by diffuse elastic neutron scattering

Conference · Thu Jan 01 00:00:00 EST 2015

OSTI ID:1185583

Specht, Eliot D ^[1]; Ma, Jie ^[1]; Delaire, Olivier A ^[1]; Budai, John D ^[1]; May, Andrew F ^[1]; Karapetrova, Evguenia A. ^[2]

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1. ORNL
2. Argonne National Laboratory (ANL)

Diffuse elastic neutron scattering measurements confirm that AgSbTe2 has a hierarchical structure, with defects on length scales from nanometers to microns. While scattering from mesoscale structure is consistent with previously-proposed structures in which Ag and Sb order on a NaCl lattice, more diffuse scattering from nanoscale structure suggests a structural rearrangement in which hexagonal layers form a combination of (ABC), (ABA), and (AAB) stacking sequences. The AgCrSe2 structure is the best-fitting model for the local atomic arrangements.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1185583
• Resource Relation: Conference: International Conference on Thermoelectrics - ICT2014, Nashville, TN, USA, 20140706, 20140706
• Country of Publication: United States
• Language: English