抄録
The magnetic characteristics of the dilute magnetic system GaGdN are investigated mainly by soft-X-ray magnetic circular dichroism (MCD) in the energy range of 1160-1240 eV. The strong MCD signals up to 30 % at 15K are observed. The temperature dependence of the signal intensity is not on a simple Curie-Weiss curve but depicts a three-step curve. A step around 40-100K suggests a new magnetic phase. The luminescence spectrum of GaGdN at low temperature is divided into three parts consisting of two broad bands around 432 nm and 503 nm and a sharp peak at 652 nm. This sharp line is assigned to the intra-transition of the f-f orbital owing to the weak temperature dependence of the intensity and the peak position. AlGdN grown by molecular beam epitaxy produces luminescence at 318.5 nm. X-ray absorption fine structure is examined to survey the occupancy of the Gd ion in the grown specimens.
本文言語 | English |
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ページ(範囲) | 49-60 |
ページ数 | 12 |
ジャーナル | Materials Research Society Symposium Proceedings |
巻 | 1111 |
出版ステータス | Published - 2009 |
外部発表 | はい |
イベント | 2008 MRS Fall Meeting - Boston, MA, United States 継続期間: 2008 12月 2 → 2008 12月 5 |
ASJC Scopus subject areas
- 材料科学(全般)
- 凝縮系物理学
- 材料力学
- 機械工学