TY - JOUR
T1 - Superconductivity in Mg2IR3Si
T2 - A fully ordered laves phase
AU - Kudo, Kazutaka
AU - Hiiragi, Hikaru
AU - Honda, Toshiaki
AU - Fujimura, Kazunori
AU - Idei, Hiroyuki
AU - Nohara, Minoru
N1 - Funding Information:
A part of this work was performed at the Advanced Science Research Center, Okayama University. This work was partially supported by Grants-in-Aid for Scientific Research (JP15H05886, JP19K03748, JP19H05823) provided by the Japan Society for the Promotion of Science.
Funding Information:
Acknowledgment A part of this work was performed at the Advanced Science Research Center, Okayama University. This work was partially supported by Grants-in-Aid for Scientific Research (JP15H05886, JP19K03748, JP19H05823) provided by the Japan Society for the Promotion of Science.
Publisher Copyright:
© 2020 The Physical Society of Japan
PY - 2020
Y1 - 2020
N2 - Novel ternary Laves phase compounds were explored, and Mg2Ir3Si was synthesized via a solid-state reaction. X-ray diffraction studies revealed that Mg2Ir3Si crystallizes in a Mg2Cu3Si-type structure (P63=mmc, D6h 4, No. 194), which corresponds to a fully ordered variant of hexagonal Laves phase MgZn2. The structure is composed of a hexagonal diamond network of Mg atoms, a breathing Kagome network of Ir atoms, and a triangular network of Si atoms. Electrical resistivity, magnetization, and specific heat measurements of Mg2Ir3Si revealed that it exhibits superconductivity with a transition temperature of 7 K. This compound is compared to another Laves phase compound, Li2IrSi3, in which the positions of Ir and Si are interchanged; Li2IrSi3 has a superconducting transition temperature of 3.8 K. The results obtained demonstrate that both Ir and Si Kagome networks can occur in fully ordered Laves phase compounds, i.e., in Mg2Ir3Si and Li2IrSi3, and the former is preferable for superconductivity.
AB - Novel ternary Laves phase compounds were explored, and Mg2Ir3Si was synthesized via a solid-state reaction. X-ray diffraction studies revealed that Mg2Ir3Si crystallizes in a Mg2Cu3Si-type structure (P63=mmc, D6h 4, No. 194), which corresponds to a fully ordered variant of hexagonal Laves phase MgZn2. The structure is composed of a hexagonal diamond network of Mg atoms, a breathing Kagome network of Ir atoms, and a triangular network of Si atoms. Electrical resistivity, magnetization, and specific heat measurements of Mg2Ir3Si revealed that it exhibits superconductivity with a transition temperature of 7 K. This compound is compared to another Laves phase compound, Li2IrSi3, in which the positions of Ir and Si are interchanged; Li2IrSi3 has a superconducting transition temperature of 3.8 K. The results obtained demonstrate that both Ir and Si Kagome networks can occur in fully ordered Laves phase compounds, i.e., in Mg2Ir3Si and Li2IrSi3, and the former is preferable for superconductivity.
UR - http://www.scopus.com/inward/record.url?scp=85078121551&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85078121551&partnerID=8YFLogxK
U2 - 10.7566/JPSJ.89.013701
DO - 10.7566/JPSJ.89.013701
M3 - Article
AN - SCOPUS:85078121551
SN - 0031-9015
VL - 89
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 1
M1 - 013701
ER -