Actions for Single-crystal neutron diffraction studies on Ni-based metal-pnictide superconductor BaNi2As2 [electronic resource].

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Single-crystal neutron diffraction studies on Ni-based metal-pnictide superconductor BaNi2As2 [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We report the results of single-crystal neutron diffraction studies of the superconductor BaNi₂As₂. The experiments were performed on a tiny crystal of mass 0.8 mg at several temperatures between 20 and 200 K using the Single Crystal Diffractometer, SCD, at the Los Alamos Neutron Science Center. Above 130 K, BaNi₂As₂ crystallizes in the tetragonal ThCr₂Si₂ structure. Our neutron diffraction data corroborate a first-order structural transition around 130 K with a relatively large hysteresis of about 10K, in agreement with observations from bulk studies. The anisotropic thermal displacement coefficients are enhanced along c-axis approaching the transition, and a splitting is observed for in-plane type reflections below the transition, which is evidence for a change in crystal structure.
Report Numbers
E 1.99:la-ur-09-03692
E 1.99: la-ur-09-3692
la-ur-09-3692
la-ur-09-03692
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Note
Published through SciTech Connect.
01/01/2009.
"la-ur-09-03692"
" la-ur-09-3692"
FT
Nakotte, Heinz; Kothapalli, Karunakar; Ronning, F; Bauer, E D; Schultz, A J.
Funding Information
AC52-06NA25396
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