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Hoshina Lab
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The lab controls the vibrations of atoms in crystals to create new electronic materials.
AboutAbout the lab
Controlling phonons to improve material performance.
The Hoshina Lab studies the properties of materials related to phonons, the regular vibrations of atoms and ions in crystals.
The lab develops research that changes the structure of materials at the nanometer scale to greatly enhance phonon-related properties, and builds the academic framework that underlies it.
Targeting dielectrics, ferroelectrics, piezoelectrics, and ionic conductors, the lab covers everything from materials synthesis to computational science and measurement.
It develops electroceramic materials and devices for the environment, energy, and medicine.
Key terms
- Phonon
- The regular vibration of atoms and ions in a crystal. It influences electrical and optical properties.
- Dielectric
- A material that does not conduct electricity, but whose internal charges shift when voltage is applied. It is used in capacitors.
- Piezoelectric material
- A material that generates electricity when force is applied and changes shape when voltage is applied.
NewsLab news
Assistant Professor Yasuhara won a Young Researcher Lecture Award at the Japan–China Meeting on Ferroelectrics
A figure from a student's paper was selected as the cover of the Journal of the Ceramic Society of Japan
A master's student won a Poster Award at MRM2025
A master's student won an Excellence Award and an Encouragement Award at the Electronic Materials Symposium
A master's student won a Poster Award at STAC-15
ResearchResearch themes
The lab studies materials involving phonons, such as dielectrics, ferroelectrics, piezoelectrics, and ionic conductors. Its work spans the synthesis of bulk materials, single crystals, and thin films, computational and data science, and high-frequency and spectroscopic measurements.
*Illustrative imageClarifying the origin of dielectric properties
The lab has built its own ellipsometer that can directly measure the complex permittivity in the terahertz range, and uses it to clarify the relationship between phonons and dielectric properties. It also investigates the effect of grain size in barium titanate-based ceramics and the role of defects introduced into materials.
*Illustrative imageSearching for new ferroelectrics
Existing ferroelectric materials used in memory and other devices are approaching their performance limits, so the lab searches for new ones. Its targets include single crystals of silicate compounds, molecular ferroelectrics that combine organic and inorganic components, and wurtzite-type and tungsten bronze-type compounds.
*Illustrative imagePioneering new ways of making materials
The lab pioneers methods to lower, as much as possible, the high-temperature firing that is essential for making ceramics. It works on room-temperature synthesis of perovskite oxides, cold sintering that uses a solvent to densify materials below 300°C, and the transfer of thin films onto flexible substrates.
*Illustrative imageEnergy materials for batteries
The lab investigates the mechanisms by which lithium-ion secondary batteries degrade, using thin-film electrodes with aligned crystal orientation. It is also developing new oxide lithium-ion conductors for non-flammable all-solid-state batteries.
MembersFaculty
The Hoshina Lab consists of faculty members, administrative assistants, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorTakuya HoshinaPublications ↗
- Assistant ProfessorSou YasuharaPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Ceramic capacitors mounted on a PCB” Giovanna 27 / CC BY 4.0 (cropped)
- Clarifying the origin of dielectric properties: “BaTiO3ceramics” Materialscientist / CC BY-SA 3.0 (cropped)
- Searching for new ferroelectrics: “Ceramic fracture” Mtbusca / CC BY 4.0 (cropped)
- Pioneering new ways of making materials: “Dense pellet forming10” Dominik Bejma, Marta Kowalkińska / CC BY-SA 4.0 (cropped)
- Energy materials for batteries: “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped)
- Related lab (舟窪研究室): “LiNbO3” Solid State / Public domain (cropped)
- Related lab (横田研究室): “Microscopic image of crystals growing from melted sulfur” AlexmarPhoto / CC BY 4.0 (cropped)
- Related lab (片瀬研究室): “Wire for ITER superconducting magnets ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
- Related lab (大場・
高橋研究室): “Suiren2 in KEK” Osumi Akari / CC BY-SA 4.0 (cropped)
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