| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1329536 | Journal of Solid State Chemistry | 2015 | 6 Pages |
•Synthesized and characterized single crystals of two new Zintl compounds SmMg2Sb2 and SmMg2Bi2.•Stabilization of divalent samarium in mixed magnesium rich fluxes.•Magnetic data has been analyzed which reveals the divalency of Sm in SmMg2Bi2.
Single crystals of LnMg2Bi2 (Ln=Yb, Eu, Sm) and SmMg2Sb2 were synthesized using Mg–Bi metal and Mg–Sb metal fluxes, respectively. The crystal structures are of the CaAl2Si2 type with space group P 3̅m1 (#164, Z=1): SmMg2Bi2 (a=4.7745(1) Å, c=7.8490(2) Å), EuMg2Bi2 (a=4.7702(1) Å, c=7.8457(2) Å), YbMg2Bi2 (a=4.7317(2) Å, c=7.6524(3) Å), and SmMg2Sb2 (a=4.6861(1) Å, c=7.7192(2) Å). Heat capacity, electrical transport, and magnetization of all bismuth containing phases were measured. The materials behave as “poor metals” with resistivity between 2 and 10 mΩ cm. Temperature independent Van Vleck paramagnetism is observed in SmMg2Bi2 indicative of divalent samarium (Sm2+) ions.
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