Crystal and Electronic Structures and Magnetic Properties of Eu₃Tt₂As₄ (Tt = Si, Ge)

Abstract

Two new europium-containing Zintl phases, Eu 3 Si 2 As 4 and Eu 3 Ge 2 As 4 , were discovered from metal flux reactions and their structures were identified by using single-crystal X-ray diffraction. Both compounds crystallize in the monoclinic space group P2 1 /c and are isotypic to Sr 3 Ge 2 As 4 . Magnetic property studies were performed and the results proved the [a] State Key

Synthesis, polymorphism, and electronic structures of Sr3Sn2As4

“…It is not surprising that both compounds have shown a distinct thermal behavior due to their different structures. The thermal behavior of the β-phase is very similar to its isostructural analogue Eu 3 Ge 2 As 4 , 26 which also has a mass loss of about 7% in the range from 830 K to 1170 K.…”

Experimental and Theoretical Studies on the Crystal Structure of Ternary Copper Arsenides A2Cu3As3 (A = Sr, Eu)

“…However, some europium compounds such as Eu 3 Ge 2 As 4 and EuMn 2 P 2 exhibit both FM and AFM coupling in their structures . The reasons are very complicated and, as demonstrated in our previous work, the magnetic properties of Eu 3 Ge 2 As 4 single crystals are closely associated with their complex magnetic structure, which contributes to a clear magnetic anisotropy and the coexistence of both FM and AFM order in the structure …”

“…These materials not only feature diverse crystal structures but also exhibit intriguing physical properties . The transition‐metal pnictide Zintl phases are especially of interest, and their thermoelectricity, superconductivity, magnetism, and mixed valence, have been reported frequently. In addition to Yb 14 MnSb 11 , other Zintl compounds such as Yb 9 Mn 4.2 Sb 9 , Ca 1– x RE x Ag 1– y Sb (RE = La, Ce, Pr, Nd, Sm; 0 < x < 1, 0 < y < 1) are also potential candidates for thermoelectric applications.…”

Unique structure type and antiferromagnetic ordering in semiconducting Eu2InSnP3

“…Overall, the magnetization behavior shows that Eu 2 InSnP 3 undergoes a spinflop transition very similar to the textbook example of one-dimensional EuSb 2 which has the monoclinic space group P 2 1 /m. 45 Spin-flop transitions are common in Eu-based pnictides that have uniaxial anisotropy, such as P 2/m EuGa 2 As 2 , 46 P 2 1 /c Eu 3 Ge 2 As 4 , 47 and P 4/nmm Eu-SnP. 6,7 Structurally, Eu 2 InSnP 3 has a similar channellike magnetic arrangment and the same P nma space group as EuGa 2 Sb 2 , but the metamagnetism in that compound is much more subtle.…”