Publication Date
2016
Department
Ames Laboratory; Chemistry; Physics and Astronomy
Campus Units
Ames Laboratory, Chemistry, Physics and Astronomy
OSTI ID+
1347900
Report Number
IS-J 9183
DOI
10.1021/acs.chemmater.6b04505
Journal Title
Chemistry of Materials
Volume Number
28
Issue Number
23
First Page
8484
Last Page
8488
Abstract
Bi21.2(1)(Mn1-xCox)20 is a new metastable phase which is synthesized via Bi self-flux, adopts a highly fibrous morphology, and decomposes endothermically near 168 °C. It crys-tallizes in the orthorhombic space group Imma with unit cell parameters a = 19.067(4) Å, b = 4.6071(10) Å and c = 11.583(4) Å, adopting a low-temperature modification of BiNi-type struc-ture by forming columns along the b-axis. Wavelength-dispersive X-ray spectroscopy (WDS) confirms the presence of Co in the structure, which is found to be 7 at.%. In each column, the transition metal (T) and Bi atoms construct a double-walled nanotubular arrangement of atoms around the disordered central Bi atoms. Electronic structure calculations (LMTO-ASA, LSDA) show that the calculated Fermi level falls into a pseudogap and also indicate a possible low-temperature magnetic ordering in the phase.
DOE Contract Number(s)
AC02-07CH11358
Language
en
Department of Energy Subject Categories
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Publisher
Iowa State University Digital Repository, Ames IA (United States)
