2014年11月
Spin reorientation and large magnetic anisotropy of metastable bcc Co islands on Au(001)
PHYSICAL REVIEW B
- 巻
- 90
- 号
- 17
- 開始ページ
- 174410
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.90.174410
- 出版者・発行元
- AMER PHYSICAL SOC
We studied magnetism and morphology of metastable bcc Co nanostructures on Au(001) by x-ray magnetic circular dichroism in combination with scanning tunneling microscopy and photoelectron emission microscopy. While room-temperature deposition of Co onto Au(001) leads to the formation of bcc Co thin films with pure in-plane magnetization, postannealing of these thin films at 500 K drastically changes the morphology to bcc Co islands embedded in Au. In accordance with this morphological change, we find that an out-of-plane magnetization emerges additionally and the coexistence of in-plane and out-of-plane remanent magnetizations is observed for the islands. The nanostructure-size dependence of magnetic moments suggests that the magnetization easy axis of the island changes from the in-plane to the out-of-plane direction with decreasing nanostructure size. Such a spin reorientation transition is likely due to the increased fractional population of rim atoms generating the out-of-plane magnetization in the smaller islands. The observed out-of-plane remanent magnetization of the smaller islands indicates their large magnetic anisotropy.
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevB.90.174410
- ISSN : 1098-0121
- eISSN : 1550-235X
- Web of Science ID : WOS:000345465000002