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Synthesis, structural transformation, thermal stability, valence state, and magnetic and electronic properties of PbNiO$$_{3}$$ with perovskite- and LiNbO$$_{3}$$-type structures

ペロフスカイト及びLiNbO$$_{3}$$型構造を有するPbNiO$$_{3}$$の合成,構造相転移,熱安定性,価電子状態及び磁気電気特性

稲熊 宜之*; 田中 樹恵*; 土谷 武史*; 森 大輔*; 勝又 哲裕*; 大場 友則*; 開 康一*; 高橋 利宏*; 齋藤 寛之

Inaguma, Yoshiyuki*; Tanaka, Kie*; Tsuchiya, Takeshi*; Mori, Daisuke*; Katsumata, Tetsuhiro*; Oba, Tomonori*; Hiraki, Koichi*; Takahashi, Toshihiro*; Saito, Hiroyuki

We synthesized two high-pressure polymorphs PbNiO$$_{3}$$ with different structures, a perovskite-type and a LiNbO$$_{3}$$-type structure, and investigated their formation behavior, detailed structure, structural transformation, thermal stability, valence state of cations, and magnetic and electronic properties. A perovskite-type PbNiO$$_{3}$$ synthesized at 800$$^{circ}$$C under a pressure of 3 GPa crystallizes as an orthorhombic GdFeO$$_{3}$$-type structure with a space group Pnma. The reaction under high pressure was monitored by an in situ energy dispersive X-ray diffraction experiment, which revealed that a perovskit-type phase was formed even at 400$$^{circ}$$C under 3 GPa.

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パーセンタイル:86.04

分野:Chemistry, Multidisciplinary

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