Synthesis and characterization of the nonstoichiometric perovskite-type compound ScRh3Bx

Toetsu Shishido, Jinhua Ye, Shigeru Okada, Kunio Kudou, Takahiko Sasaki, Susumu Isida, Takashi Naka, Masaoki Oku, Iwami Higashi, Hiroshi Kishi, Hiroyuki Horiuchi, Tsuguo Fukuda

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Polycrystalline samples of ScRh3Bx (0≤x≤1.0) were synthesized by the arc melting method. The crystal structure is the perovskite-type cubic structure (space group Pm3m) for boron content in the range 0≤x≤1.0 (0-20 at.% B). The lattice parameter a varies linearly from a = 0.3903(1) nm (x = 0) to 0.40799(3) nm (x = 1.0). The micro-Vickers hardness increases with increasing boron content from 1.9 (±0.1) GPa for ScRh3 (0 at.% B) to 9.9 (±0.1) Gpa for SchRh3B1.0 (20 at.% B). Thermogravimetric analysis indicates that the oxidation onset temperature for stoichiometric ScRh3B is 868 K. A sharp exothermic peak is observed at 1068 K by differential thermal analysis. The weight gain of the sample by heating in air up to 1473 K is 12.7%. The weight gain increases with increasing boron content. All samples in the range 0≤x≤1.0 show a metallic temperature dependence of the resistivity down to 0.5 K. Magnetic susceptibilities also show Pauli paramagnetic behavior and no trace of magnetic transitions on superconductivity in any of the samples.

Original languageEnglish
Pages (from-to)107-112
Number of pages6
JournalJournal of Alloys and Compounds
Volume309
Issue number1-2
DOIs
Publication statusPublished - 2000 Sep 14

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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