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. 2016 May 24;72(Pt 6):845-8.
doi: 10.1107/S2056989016008082. eCollection 2016 Jun 1.

Crystal Structure and Magnetic Properties of LaCa0.143 (4)O0.857 (4)F0.143 (4)Bi0.857 (4)S2

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Free PMC article

Crystal Structure and Magnetic Properties of LaCa0.143 (4)O0.857 (4)F0.143 (4)Bi0.857 (4)S2

Rongtie Huang et al. Acta Crystallogr E Crystallogr Commun. .
Free PMC article

Abstract

The synthesis, structure, and magnetic properties of lithium dibarium calcium oxide fluoride di-sulfide are reported. LaCa0.143 (4)O0.857 (4)F0.143 (4)Bi0.857 (4)S2 crystallizes in the tetra-gonal space group P4/nmm. The structure exhibits disorder of the Ca(2+) and Bi(3+) cations, and the O(2-) and F(-) anions. The structure is composed of a stacking of [(O,F)2La2] layers and double [(Bi,Ca)S2] layers. Magnetic property measurements indicate a very small magnetization at 300 K and the existence of weak ferromagnetism at 2 K.

Keywords: crystal structure; disorder; magnetic properties.

Figures

Figure 1
Figure 1
SEM image of LaCa0.143 (4)O0.857 (4)F0.143 (4)Bi0.857 (4)S2.
Figure 2
Figure 2
SEM image of LaO0.6F0.4BiS2.
Figure 3
Figure 3
Crystal structure of LaCa0.143 (4)O0.857 (4)F0.143 (4)Bi0.857 (4)S2, showing [(O,F)2La2] layers and double [BiS2] layers (O/F in red, La in blue, Bi/Ca in pink and S in yellow; 50% probability ellipsoids).
Figure 4
Figure 4
Magnetic moment versus temperature for LaCa0.143 (4)O0.857 (4)F0.143 (4)Bi0.857 (4)S2 under a 1 T field.
Figure 5
Figure 5
Magnetic moment versus field for LaCa0.143 (4)O0.857 (4)F0.143 (4)Bi0.857 (4)S2 from −5 T to 5 T at 2 K and 300 K.

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