Quantum Size Effects in Light Absorption Spectraof Magnetite Fine Particles Dispersed in Magnetic Fluids
-
- Taketomi Susamu
- Matsumoto Yushi-Seiyaku Co. Ltd.
-
- Takahashi Hiromasa
- Department of Physics, Faculty of Sciences and Technology, Keio University
-
- Inaba Nobuyuki
- Department of Physics, Faculty of Sciences and Technology, Keio University
-
- Miyajima Hideki
- Department of Physics, Faculty of Sciences and Technology, Keio University
書誌事項
- タイトル別名
-
- Quantum Size Effects in Light Absorptio
この論文をさがす
抄録
Light absorption spectra of magnetite fine particles of about 7 nm in mean diameter dispersed in magnetic fluid were measured as functions of photon energy, E, from 0.5 eV through 1.8 eV and of particles’ temperature from 294 K up to 383 K. The light absorption coefficient α of the particles is smaller than that of the bulk magnetite. With increasing temperature, α decreases for E lower than 1.378 eV, but it increases for E higher than 1.378 eV. In addition, the spectra are shifted towards higher energy region by 0.136 eV compared with that of the bulk magnetite. If concentration of oscillator strengths on the bottom of 4s band of iron ion is assumed, the energy shift can be interpreted in terms of the quantum size effect of the fine particles, and the effective mass of the 4s electron is evaluated to be 0.37 times as much as that of a bare electron.
収録刊行物
-
- Journal of the Physical Society of Japan
-
Journal of the Physical Society of Japan 60 (10), 3426-3432, 1991
一般社団法人 日本物理学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390282679153430784
-
- NII論文ID
- 210000096338
- 110001977087
- 130003740805
-
- NII書誌ID
- AA00704814
-
- BIBCODE
- 1991JPSJ...60.3426T
-
- COI
- 1:CAS:528:DyaK3MXms1Glu7s%3D
-
- ISSN
- 13474073
- 00319015
- http://id.crossref.org/issn/00319015
-
- NDL書誌ID
- 3740302
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可