Our group aims to develop low temperature synthesis routes to new inorganic materials. Low temperature reactions typically yield products of predictable structure. We utilize these methods to rationally design various new materials with ultimate applications in superconductivity, magnetism, dielectrics, catalysis, and other interesting fields.

Hiroshi Kageyama Group

陰山研究室
陰山研究室
陰山研究室
陰山研究室
陰山研究室
陰山研究室
陰山研究室
陰山研究室
陰山研究室

Welcome! We are a newly independent group since January, 2010, specializing in solid state chemistry. As a new group, we are constantly looking for a diverse set of new members. We have extensive experience with collaborations overseas in Europe and the United States, and regularly host visitors and students from a variety of backgrounds. Please inquire freely about openings in the group.

Research Concept

Designing Oxides via Low Temperature Synthesis

Generally, the designed synthesis of oxides is difficult under high temperatures. We plan to circumvent this problem by developing a toolbox of low-temperature reactions instead.

The reduction of the simple compound SrFeO3 shown on the right illustrates one of our approaches (2007). In the movie on the right, oxygen anions (red spheres) are removed in an orderly manner from SrFeO3 to form SrFeO2, resulting in a structure composed of square planar FeO4 units. This is highly unusual, given that iron is generally known to adopt only tetrahedral or octahedral coordination. The fact that such a novel geometry comes from such a simple method and composition is a testament to the wide range of possibilities of these low-temperature synthesis techniques.


BTOH

Hydrogen moves! Seemingly bouncing around, hydride (H-; white spheres) can exist quite comfortably in simple oxides such as BaTiO3, and furthermore diffuse throughout the lattice.

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2022/10
The lecture will be held in October: October 4th 15:00- A2-303 [ Ambipolar Property of Isolated Hydrogen in Oxide Materials Revealed by Muon ] Prof. Ryosuke Kadono (KEK, the High Energy Accelerator Research Organization)
2020/1
The lecture will be held by Prof. Shiv Halasyamani (University of Houston)

Jan. 7 (Tue) 10:30 am - 12:00 am (A2-307) #1: “Tutorial lecture on X-ray diffraction and crystallography

Jan. 7 (Tue) 1:00 pm - 2:30 pm (A2-307) #2: “Tutorial lecture on NLO materials - symmetry, phase-matching, etc.”

Jan. 8 (Wed) 10:30 am - 12:00 am (A2-303) #3: “Tutorial lecture on publishing in ACS Journals”

Jan. 8 (Wed) 1:00 pm - 2:30 pm (A2-303) #4: “Research lecture on recent NLO materials from my lab”

2020/1
The JGP seminar will be held in January: January 8th 13:00-14:30 A2-304 「Research lecture on recent NLO materials from my lab」Prof. Shiv Halasyamani (University of Houston)
2019/12
The lecture will be held in December: December 16th 11:00- A2-304 「Enhanced performance through point defects in half-Heusler thermoelectrics」Prof. Jan-Willem Bos (Heriot-Watt University)
2019/12
The lecture will be held in December: December 13th 13:00- A2-308 「Geo-inspiration to extend the composition range of functional inorganic nanoparticles」Prof. David Portehault (Sorbonne University)
2019/11
The lecture will be held in November: November 29th 11:00- A2-304 Prof. Alain Demourgues(University of Bordeaux)
2019/11
The lecture will be held in November: November 1st 14:00- A2-307 「Defect structures in oxide ion conductors containing tetrahedral moieties」Prof. Xiaojun Kuang (Guilin University of Technology)
2019/8
The lecture tour will be held in August: August 8th 13:00-15:00 A2-303 「New Aspects of Chemical Bonding in Solids using Orbitals and Plane Waves」 Prof. Richard Dronskowski (RWTH Aachen University)
2019/7
The lecture tour on mixed-anion compounds will be held in July: July 10th 13:00-14:00 A2-303 「Orbital molecules in vanadium oxide spinels」 Alexander J. Browne (The University of Edinburgh) July 11th 13:00-14:00 A2-303 「Flux Crystal Growth of Uranium Framework Materials」 Christian A. Juillerat (The University of South Carolina)
2019/6
The lecture tour will be held in June: June 25th 13:00- A2-303 「Navigating stability and metastability in the synthesis of novel functional materials」 Wenhao Sun (Lawrence Berkeley National Laboratory)
2019/1/21, 24
Lecture tour on mixed-anion compounds by Prof. Artem Abakumov (Skolkovo Institute of Science and Technology, Russia), " Electron diffraction tomography for solving complex structure （A2-302, 14:00~(1/21), A2-302, 14:00~(1/24)）
2018/2
A review paper on mixed-anion compounds published in Nature Communications
2018/10/22
JGP-Mixed-Anion Seminar by Prof. Emilia Morosan (Rice Univ.), "EXOTIC QUANTUM MAGNETS AND COMPETING STATES - Novel low carrier Kondo systems", A2-302; 15:00
2018/10/23-24
JGP lecture by Prof. Emilia Morosan (Rice Univ.), A2-302; 13:00~14:30, 14:45~16:15
2018/2/20
Seminar by Prof. Junichiro Kono (Rice Univ.), "Cavity QED in Quantum Materials", A2-308; 15:30
2017/12
Paper on Madelung analysis for mixed-anion photocatalsts, published in JACS, selected as "Spotlight".
2017/11
Paper on pressure study of oxyhydride, published in Nature Communications.
2017/11
We will organize International Symposium in Nagoya, "New Trends in Solid State Chemistry: from Oxides to Mixed Anion http://www.mixed-anion.toyotariken.jp/index.html
2017/4/7
Lecture tour on mixed-anion compounds by Prof. Michael Hayward (University of Oxford, UK), " opochemical reduction and anion exchange as a route to novel electronic materials" (A2-303, 13:30PM~)
2017/4/7
JGP-Mixed-Anion Seminar by Prof. Daniel Fredrickson (University of Wisconsin-Madison, USA), "Discerning the Molecular in the Metallic: How Iterating Theory and Experiment Reveals Lessons for Materials Design in Complex Intermetallics" (A2-304, 13:00PM~)
2017/3/9
JGP-Mixed-Anion Seminar by Prof. Kanishka Biswas (Jawaharlal Nehru Centre for Advanced Scientific Research, India), "Modulation of the Electronic Structure and Phonon Transport of Metal Chalcogenides for High Thermoelectric Performance" (A2-123, 10:30PM~)
2016/8/8
Seminar by Prof. Chris Ling (Univ. Sydney, Australia), "Pressure-induced valence transitions in metal oxides: squeezing the electrons out of lone pairs", A2-123; 13:30〜
2016/8/2
We will organize a symposium on "Kyoto-Krakow Symposium on Materials Science", A2-123: 13:00-17:15 filebrochure
2016/4/27
Seminar Dr. S. M. Yusuf (Bhabha Atomic Research Center, India), "Basic Understanding of Magnetization Reversal Phenomenon and Its Practical Implications", A2-307; 13:00〜
2016/3
Lecture by Prof. Olivier Hernandez (Univ. Rennes 1, France), "Advanced structural analyses by X-ray/neutron diffraction/total scattering", A2-302, 10:00~12:00 (3/10), 10:00~12:00 (3/11)
2016/1/29
Seminar by Prof. Tanusri Saha-Dasgupta (S.N.Bose National Centre for Basic Sciences, India), "Electronic Structure of Double Perovskites: Compounds with Promises", A2-303, 14:00
2016/1/29
Seminar by Prof. Kenneth Poeppelmeier (Northwestern Univ., USA), "Reimagine the Possible: Accelerating Materials Discovery ", A2-303, 16:00
2015/10/24
Seminar by Prof. Nic Shannon (Okinawa Institute of Science and Technology), "Quantum water ice", A2-123, 16:00
2015/10/20
Seminar by Prof. Paul Attfield (University of Edinburgh), "New Orders in Simple Solids", A2-308, 10:30
2015/6/24
Seminar by Prof. Aron Walsh (University of Bath), "Emerging materials for solar energy: herzenbergite, kesterite,perovskite and beyond", A2-308, 16:30
2015/2/27
Seminar by Prof. Henrik Ronnow (EPFL), "Quantum Magnetism - neutrons in the quasi-particle zoo", A2-308, 14:00PM
2015/2
Seminar by Prof. David C. Johnson (Univ. Oregon), "Self Assembly of Designed Precursors, a General Approach to New Metastable Solids with Designed Nanoarchitecture", A2-308, 10:30-12:00, 13:00-14:30
2015/12
Prof. Kageyama will co-organize a symposium "From Pnictides to Perovskites: Impact of Local Structure in Solid State Chemistry" in Pacifichem 2015. Please join us. filebrochure
2014/12
Paper on a nematic state in BaTi2Pn2O superconductor, published in Nature Communications, a work in collaboration with Prof. Simon Billinge
2014/11
Paper on high-pressure synthesis of magnetic oxynitride, published in Angew. Chem. Int. Ed.
2014/3
Symposium "Solid State Chemistry Potpourri in Kyoto" (March 11 & 12 at A2-306, Katsura campus). fileprogram
2014/2
We will organize a symposium "From Pnictides to Perovskites: Impact of Local Structure in Solid State Chemistry" in Pacifichem 2015. Please join us.
2014/2
Prof. Kageyama wins JSPS prize
2012/4
Paper on hydride mobility in perovskite BaTiO3, published in Nature Materials. nolink
2012/2
Review paper on square-planar coordinate iron oxides, published in Chem. Soc. Rev.
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2009/7
Paper on spin-state transition transition for a four-coordinate metal, published in Nature Chemistry.
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2007/12
Paper on synthesis of SrFeO2 with a square planar coordination, published in Nature.
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