%0 Journal Article
%A Regnat, A.
%A Bauer, A.
%A Senyshyn, A.
%A Meven, M.
%A Hradil, K.
%A Jorba, P.
%A Nemkovski, K.
%A Pedersen, B.
%A Georgii, R.
%A Gottlieb-Schönmeyer, S.
%A Pfleiderer, C.
%T Canted antiferromagnetism in phase-pure CuMnSb
%J Physical review materials
%V 2
%N 5
%@ 2475-9953
%C College Park, MD
%I APS
%M FZJ-2019-00341
%P 054413
%D 2018
%X We report the low-temperature properties of phase-pure single crystals of the half-Heusler compound CuMnSb grown by means of optical float zoning. The magnetization, specific heat, electrical resistivity, and Hall effect of our single crystals exhibit an antiferromagnetic transition at TN=55 K and a second anomaly at a temperature T∗≈34 K. Powder and single-crystal neutron diffraction establish an ordered magnetic moment of (3.9±0.1)μB/f.u., consistent with the effective moment inferred from the Curie-Weiss dependence of the susceptibility. Below TN, the Mn sublattice displays commensurate type-II antiferromagnetic order with propagation vectors and magnetic moments along ⟨111⟩ (magnetic space group R[I]3c). Surprisingly, below T∗, the moments tilt away from ⟨111⟩ by a finite angle δ≈11∘, forming a canted antiferromagnetic structure without uniform magnetization consistent with magnetic space group C[B]c. Our results establish that type-II antiferromagnetism is not the zero-temperature magnetic ground state of CuMnSb as may be expected of the face-centered cubic Mn sublattice.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000433044400001
%R 10.1103/PhysRevMaterials.2.054413
%U https://juser.fz-juelich.de/record/859488