Incommensurate magnetic structure of CrAs at low temperatures and high pressures

Eich, A.; Grzechnik, A.; Su, Y.; Ouladdiaf, B.; Sheptyakov, D.; Wolf, T.; Petricek, V.; Shahed, H.; Friese, K.

doi:10.1107/S205252062300817X

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 4
The directional components of the magnetic moment along the x, y and z axes (M_x, M_y and M_z, respectively) in the approximate structures with c′ = 20/7 c of the basic structures for the magnetic models in P2₁.1′(α0γ)0s, P $[\overline 1]$ .1′(αβγ)0s and in the double helix (Watanabe et al., 1969

; Selte et al., 1971

) at 0.12 GPa and 2 K. For the sake of clarity, the components are plotted only for five unit cells. Points indicate values realized on Cr sites, full lines show the underlying modulation function. The colours correspond to different Cr sites. Blue, red, green and yellow symbols/lines are for CrI (x, y, z), CrII (x + ½, −y + ½, −z + ½), CrIII (−x + ½, −y, z + ½) and CrIV (−x, y + ½, −z), respectively. The dashed grey lines mark the unit-cell borders of the basic crystal structure. The absolute values |M| of the magnetic moment are constant: |M| = 3.16 (3) μ_B for P2₁.1′(α0γ)0s, |M| = 3.23 (4) μ_B for P $[\overline 1]$ .1′(αβγ)0s and |M| = 2.8859 (8) μ_B for the double helix.

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 79| Part 6| December 2023| Pages 473-481

https://doi.org/10.1107/S205252062300817X

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