journal article·2016-09-13

Glassy Distribution of Bi3+/Bi5+ in Bi1–xPbxNiO3 and Negative Thermal Expansion Induced by Intermetallic Charge Transfer

Kiho Nakano, Kengo Oka, Tetsu Watanuki, Masaichiro Mizumaki, Akihiko Machida, Akane Agui, Hyunjeong Kim, Jun Komiyama, Takashi Mizokawa, Takumi Nishikubo, Yuichiro Hattori, Shigenori Ueda, Yuki Sakai, Masaki Azuma

Chemistry of Materials· Volume 28· Issue 17
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Abstract

The valence distribution and local structure of Bi 1– x Pb x NiO 3 ( x ≤ 0.25) were investigated by comprehensive studies of Rietveld analysis of synchrotron X-ray diffraction (SXRD) data, X-ray absorption spectroscopy (XAS), hard X-ray photoemission spectroscopy (HAXPES), and pair distribution function (PDF) analysis of synchrotron X-ray total scattering data. Disproportionation of Bi ions into Bi 3+ and Bi 5+ was observed for all the samples, but it was a long-ranged one with distinct crystallographic sites in the P 1̅ triclinic structure for x ≤ 0.15, while the ordering was short-ranged for x = 0.20 and 0.25. An intermetallic charge transfer between Bi 5+ and Ni 2+, leading to large volume shrinkage, was observed for all the samples upon heating at ∼500 K.
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Research context

OpenAlex topics: Thermal Expansion and Ionic Conductivity · Ferroelectric and Piezoelectric Materials · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan

Quantum Beam Science Center, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan

Japan Synchrotron Radiation Research Institute, SPring-8, Sayo-gun, Hyogo 679-5198, Japan

National Institute of Advanced Industrial Science and Technology, Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan

Department of Complexity Science and Engineering, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan

Department of Applied Physics, School of Advanced Science and Engineering, Waseda Unversity, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan

Quantum Beam Unit, National Institute for Materials Science, Sengen, Tsukuba 305-0047, Japan

Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, Sayo, Hyogo 679-5148, Japan

Kanagawa Academy of Science and Technology, KSP, 3-2-1 Sakado, Takatsu-ku, Kawasaki City, Kanagawa 213-0012, Japan

Funding

Kanagawa Academy of Science and Technology · Japan Society for the Promotion of Science

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