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Research Highlights

Research Highlights /

Research Highlights

Professor KIM KeeHoon Develops Magnet Which Changes Poles by Electric Field

Sep 29, 2020

Professor KIM Kee Hoon
Professor KIM Kee Hoon

Professor KIM Kee Hoon (Department of Physics and Astronomy) has developed a magnet which can change poles without the help of a magnetic field. Magnetic materials, which are a key component in hard disks, record information usually by changing poles using magnetic fields. This caused many problems such as heat loss from electric currents to create a magnetic field and big size to creat the current loop. Professor Kim replaced the iron in the well-known hexaferrite material (common magnet attached in a fridge at home) with aluminum, thus creating magnetoeletric hexaferrite, and succeeded in changing magnetic poles using only electric voltage. “By changing poles with voltage and not electric currents, we can create ultra-low power consuming magnetic devices,” said Professor Kim.

Summary by LEE Hee Un, SNU English Editor, gurume0221@snu.ac.kr