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Flux Crystal Growth of the RE2Ru3Ge5 (RE = La, Ce, Nd, Gd, Tb) Series and Their Magnetic and Metamagnetic Transitions

TitleFlux Crystal Growth of the RE2Ru3Ge5 (RE = La, Ce, Nd, Gd, Tb) Series and Their Magnetic and Metamagnetic Transitions
Publication TypeJournal Article
Year of Publication2017
AuthorsBugaris, DE, Malliakas, CD, Bud'ko, SL, Calta, NP, Chung, DY, Kanatzidis, MG
JournalInorganic Chemistry
Volume56
Pagination14584-14595
Date Published12
Type of ArticleArticle
ISBN Number0020-1669
Accession NumberWOS:000417342200022
Keywordscharge-density-wave, chemistry, Intermetallic compounds, iron silicides, liquid indium, low-temperature, metal flux, mixed-valence, rare-earth, single-crystal, superconductivity
Abstract

Previously synthesized only as powders, single crystals of the RE2Ru3Ge5 (RE = La, Ce, Nd, Gd, Tb) series of compounds have now been obtained from molten In. These materials crystallize with the U2Co3Si5-type structure in orthorhombic space group Ibam with lattice parameters a approximate to 10.00-9.77 angstrom (La-Tb), b approximate to 12.51-12.35 angstrom, and c approximate to 5.92-5.72 A. The structure is a three-dimensional framework consisting of RuGe5 and RuGe6 units, as well as Ge-Ge zigzag chains. This structure type and those of the other five (Sc2Fe3Si5, Lu2Co3Si5, Y2Rh3Sn5, Yb2Ir3Ge5, and Yb2Pt3Sn5) to compose the RE2T3X5 phase space are discussed in depth. For the three compounds with RE = Nd, Gd, Tb, multiple magnetic transitions and metamagnetic behavior are observed. Electronic band structure calculations performed on La2Ru3Ge5 indicate that these materials have a negative band gap and are semimetallic in nature.

DOI10.1021/acs.inorgchem.7b02389
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Complex States