Crystal growth and anisotropic magnetic properties of quasi-two-dimensional(Fe1−xNix)2P2S6,Physical Review Materials

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Crystal growth and anisotropic magnetic properties of quasi-two-dimensional(Fe1−xNix)2P2S6
Physical Review Materials ( IF 3.1 ) Pub Date : 2021-07-22 , DOI: 10.1103/physrevmaterials.5.073401
S. Selter _{1,

2} , Y. Shemerliuk ₁ , M.-I. Sturza ₁ , A. U. B. Wolter ₁ , B. Büchner _{1,

3} , S. Aswartham ₁

Affiliation

We report the crystal growth by chemical vapor transport together with a thorough structural and magnetic characterization of the quasi-2D magnets

{({Fe}_{1 - x} {Ni}_{x})}_{2} P_{2} S_{6}

with

x_{Ni} = 0, 0.3, 0.5, 0.7, 0.9

, and 1. As-grown crystals exhibit a layered morphology with weak van der Waals interactions between layers parallel to the crystallographic

a b

plane of the monoclinic structure in the space group

C 2 / m

(No. 12). Magnetization measurements reveal an antiferromagnetic ground state for all grown crystals. In the ordered state, the magnetization along different crystallographic directions is in agreement with an Ising anisotropy for

0 \leq x \leq 0.9

and only for

{Ni}_{2} P_{2} S_{6}

a different behavior is observed which is in line with an anisotropic Heisenberg or

X X Z

model description. This striking abrupt change of anisotropy at a critical Ni concentration is coupled to a change in the width of the maximum in the magnetization around