Publication Date

3-6-2018

Department

Ames Laboratory; Chemistry; Physics and Astronomy

Campus Units

Chemistry, Physics and Astronomy, Ames Laboratory

OSTI ID+

1556933

Report Number

IS-J 9619

DOI

10.1021/acs.inorgchem.7b03105

Journal Title

Inorganic Chemistry

Volume Number

57

Issue Number

6

First Page

3206

Last Page

3214

Abstract

We report the synthesis and properties of a new layered tetragonal ternary compound CsMn4As3 (structure type, KCu4S3; space group, P4/mmm, no.123; and Z = 2). The material is a small band gap semiconductor and exhibits an antiferromagnetic ground state associated with Mn spins. The compound exhibits a signature of a distinct magnetic moment canting event at 150(5) K with a canting angle ≈ 0.3°. Although some features of the magnetic characteristics of this new compound are qualitatively similar to those of the related BaMn2As2, the underlying Mn sublattices of the two materials are quite different. While the Mn square-lattice layers in BaMn2As2 are equally spaced along the c-direction with the interlayer distance dL Ba = 6.7341(4) Å, the Mn sublattice forms bilayers in CsMn4As3 with the interlayer distance within a bilayer being dL Cs = 3.1661(6) Å; the distance between the two adjacent bilayers is dB = 7.290(6) Å. This difference in the Mn sublattice is bound to significantly alter the energy balance among the J1, J2, and Jc exchange interactions within the J1–J2–Jc model compared to those in BaMn2As2 and the other related 122 compounds, including the well-known iron–arsenide superconductor parent compound BaFe2As2. Owing to the novelty of its transition-metal sublattice, this new addition to the family of tetragonal materials related to the iron-based superconductors brings prospects for doping and pressure studies in the search of new superconducting phases as well as other exciting correlated electron properties.

DOE Contract Number(s)

AC02-07CH11358

Language

en

Department of Energy Subject Categories

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Publisher

Iowa State University Digital Repository, Ames IA (United States)

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