第129回 フロンティア材料研究所学術講演会(山浦一成博士)
開催日時 | 2020年11月13日 14:30 – |
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開催場所 | オンライン開催(Zoom webinar) |
主催 | 東京工業大学 科学技術創成研究院 フロンティア材料研究所 |
連絡先 | 東・山本研究室(5315) |
使用言語 | English |
備考 | 【お申し込みについて】 申込方法:登録サイトよりお申し込みください。 ※ 登録後、2日以内に参加用リンクを掲載したメールを送信します。 お申込みに関する連絡先:kenkyushien@msl.titech.ac.jp |
プログラム等
講師: Dr Kazunari Yamaura 山浦一成博士
(National Institute for Materials Science 物質材料研究機構 )
演題: New materials research and functional development of perovskite-related osmium oxides
In this talk, I will introduce recent activities of research of osmium oxides, which have been synthesized by a high-pressure and high-temperature method. The topic includes the double perovskite oxide Sr2CrOsO6 with a 3d3–5d3 configuration, which has been known to exhibit very high-TC ferrimagnetism (~725 K) at the endpoint of half-metallicity. Many substitution studies have been conducted theoretically and experimentally over the last two decades to shed more light on the open issue of how the 3d3–5d3 configuration generates the high-TC ferrimagnetic state and to accelerate development toward applications. In our study, we have succeeded in synthesizing a novel solid solution of Sr2Cr1–xNixOsO6 under high-pressure and high-temperature conditions. Sr2Cr0.5Ni0.5OsO6 exhibits magnetization six-fold greater (~1.2 μB/formula unit at 5 K) than that of Sr2CrOsO6. This enhancement is preserved even at room temperature. Other topics may also be introduced briefly.