| Autor: |
Masaaki Ashida, Eiichi Matsubara, Yohei Onishi, Tsuyoshi Kimura, Taishi Ishikura |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference (CLEO EUROPE/EQEC). |
| DOI: |
10.1109/cleoe.2011.5942522 |
| Popis: |
The Z type hexaferrites of Ba 3 Co 2 Fe 24 O 41 and Sr 3 Co 2 Fe 24 O 41 have high magnetic permeability in high frequency range so that they have been studied as candidates for frequency inductor cores and electromagnetic noise absorbers working in a gigahertz range [1]. Recently a polycrystal of Sr 3 Co 2 Fe 24 O 41 has been found to show magnetoelectric effect even at room temperature [2]. In the present study, we measured the magnetic field dependence of the THz optical absorption spectra of a powdered polycrystal of Sr 3 Co 2 Fe 24 O 41 at room temperature in search for a novel optical response related with magnetic property of solids. As a result, we found that Sr 3 Co 2 Fe 24 O 41 has some THz absorption peaks whose optical density significantly changes under weak external magnetic fields applied by a pair of permanent magnets. The frequency range where the absorption change occurs is broader than that in the case of Ba 2 Mg 2 Fe 12 O 22 , which shows the magnetoelectric effect only at low temperatures [3] |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
