Superconductivity of the partially ordered laves phase Mg2Ir2.3Ge1.7

Kazutaka Kudo, Toshiaki Honda, Hikaru Hiiragi, Hiromi Ota, Minoru Nohara

Research output: Contribution to journalArticlepeer-review

Abstract

A novel ternary Laves phase Mg2Ir2.3Ge1.7 was synthesized in this study. Single-crystal X-ray diffraction experiments confirmed a Mg2Cu3Si-type structure (P63=mmc, D46h, No. 194). The structure comprises a Mg hexagonal diamond, an Ir=Ge breathing Kagome network, and a Ge triangular networks; it is thus classified as a partially ordered Laves phase that is neither ordered nor disordered. This is in contrast to the isoelectronic Mg2Ir3Si with a fully ordered Laves phase structure. Magnetization and resistivity measurements show that bulk superconductivity occurs at 5.3 K in Mg2Ir2.3Ge1.7. The partially ordered phase is important because it forms a link between the disordered and ordered Laves phases. Moreover, our findings would provide an opportunity to study the effects of disorder on the breathing Kagome network.

Original languageEnglish
Article number123701
Journaljournal of the physical society of japan
Volume89
Issue number12
DOIs
Publication statusPublished - Dec 15 2020

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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