High-efficiency graphene nanomesh magnets realized by controlling mono-hydrogenation of pore edges
Abstract
We demonstrate a drastic improvement in the efficiency of rare-element-free graphene nanomesh (GNM) magnets with saturation magnetization values as large as ∼10−4 emu/mm2, which are 10–100 times greater than those in previous GNM magnets hydrogenated by only annealing under a hydrogen molecule (H2) atmosphere, even at room temperature. This improvement is realized by a significant increase in the area of the mono-H-terminated pore edges by using hydrogen silsesquioxane resist treatment with electron beam irradiation, which can produce mono-H by detaching H-silicon (Si) bonds. This result must open the door for industrial applications of graphene magnets to rare-element-free magnetic and spintronic systems.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jun 23, 2014
- Source ID
- 10.1063/1.4885390
Entities
People
- J. Haruyama
- J. Kamijyo
- T. Kato
- T. Kobayashi
- T. Nakamura
- Y. Yagi
Organizations
- Air Force Office of Scientific Research
- Aoyama Gakuin University
- Ministry of Education, Culture, Sports, Science and Technology
- University of Tokyo