ぺロブスカイト型YRh3Bのホウ素不定比と性質に関する研究

• 宍戸 統

• 湯葢 邦夫

• 森 孝雄

• 田中 雅彦

• 工藤 邦男

• 岡田 繁

• 野村 明子

• 菅原 孝昌

• 佐原 亮二

• 林 好一

• 古曵 重美

• 澤田 豊

• 手嶋 勝弥

• 大石 修治

• 川添 良幸

• 吉川 彰

書誌事項

タイトル別名

• Study on the Boron-Nonstoichiometry and Properties of Perovskite-Type YRh3B

抄録

Polycrystalline samples ofYRh3Bx are prepared by the arc melting synthetic method. Perovskite-type cubic phase (space group : Pm3m) of YRh3 Bx exists in the range of 0.50 ≤x≤1. Lattice parameterαof YRh3Bx depends on x, and varies linearly from a = 0.416347(4) nm (x = 1.000) to 0.408776(7) nm (x = 0.500). The value of Vickers microhardness ofYRh3Bx ranges from 7.7 to 2.7 GPa. Hardness decreases with decreasing of boron content x. The TEM observation reveals that the anomalous softening of hardness in the vicinity of x = 0.5 for YRh3 Bx is caused by the appearance of the modulated structure. By the TG-DTA, oxidation of YRh3B1.ooo starts at 541 K. The weight gain by oxidation is 11.4 %. The oxidized product is mixed phase of YB03 and Rh. The densi!Y of states at the Fermi level, D (EF), of YRh3 B1 .ooo (20 at.%B) is indicated to be slightly larger than that of YRh3B0.706(15 at.%B).

収録刊行物

• Journal of Flux Growth

  Journal of Flux Growth 8 (1), 12-17, 2013-06

  日本フラックス成長研究会

キーワード

• YRh3B
• Boron-Nonstoichiometry
• Hardness
• Oxidation resistance
• Magnetism

詳細情報

• CRID: 1571135652770462592
• NII論文ID: 120006334072
• ISSN: 18815316
• Web Site: http://hdl.handle.net/10228/00006287
• 本文言語コード: en
• データソース種別:
  • CiNii Articles