Synthesis and characterization of the divalent samarium Zintl-phases SmMg2Bi2 and SmMg2Sb2

Ramirez, D.; Gallagher, A.; Baumbach, R.; Siegrist, T.

doi:10.1016/j.jssc.2015.08.039

Title: Synthesis and characterization of the divalent samarium Zintl-phases SmMg₂Bi₂ and SmMg₂Sb₂

Journal Article · Sat Aug 29 00:00:00 EDT 2015 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2015.08.039· OSTI ID:1333510

Ramirez, D. ^[1]; Gallagher, A. ^[2]; Baumbach, R. ^[2];

^[1]

The National High Magnetic Field Lab., Tallahassee, FL (United States); Florida State Univ., Tallahassee, FL (United States); Florida Agricultural and Mechanical Univ.-Florida State Univ. College of Engineering, Tallahassee, FL (United States)
The National High Magnetic Field Lab., Tallahassee, FL (United States); Florida Agricultural and Mechanical Univ.-Florida State Univ. College of Engineering, Tallahassee, FL (United States)

Here, 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 P3 m1 (#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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Research Organization:: Florida State Univ., Tallahassee, FL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0008832

OSTI ID:: 1333510

Alternate ID(s):: OSTI ID: 1253032

Journal Information:: Journal of Solid State Chemistry, Vol. 231, Issue C; ISSN 0022-4596

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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Higher thermoelectric performance of Zintl phases (Eu _0.5 Yb _0.5 ) _1−x Ca _x Mg ₂ Bi ₂ by band engineering and strain fluctuation Shuai, Jing; Geng, Huiyuan; Lan, Yucheng Proceedings of the National Academy of Sciences, Vol. 113, Issue 29 https://doi.org/10.1073/pnas.1608794113	journal	July 2016
Large reduction of thermal conductivity leading to enhanced thermoelectric performance in p-type Mg ₃ Bi ₂ –YbMg ₂ Bi ₂ solid solutions Zhou, Ting; Mao, Jun; Jiang, Jing Journal of Materials Chemistry C, Vol. 7, Issue 2 https://doi.org/10.1039/c8tc05424j	journal	January 2019
Revelation of Inherently High Mobility Enables Mg ₃ Sb ₂ as a Sustainable Alternative to n‐Bi ₂ Te ₃ Thermoelectrics Shi, Xuemin; Sun, Cheng; Bu, Zhonglin Advanced Science, Vol. 6, Issue 16 https://doi.org/10.1002/advs.201802286	journal	June 2019
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
phase transition
magnetism
CaAl2Si2
METAL
Zintl-phase
SmMg2Bi2
SmMg2Sb2
X-ray diffraction
specific heat
Van Vleck paramagnetism
flux synthesis

Title: Synthesis and characterization of the divalent samarium Zintl-phases SmMg2Bi2 and SmMg2Sb2

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Title: Synthesis and characterization of the divalent samarium Zintl-phases SmMg₂Bi₂ and SmMg₂Sb₂