Magnetic circular dichroism study of ultrathin Ni films by threshold photoemission and angle resolved photoemission spectroscopy
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- 作者：Takeshi Nakagawa ; Isamu Yamamoto ; Yasumasa Takagi ; Toshihiko Yokoyama
- 关键词：Magnetic circular dichroism ; Photoemission ; Magnetic thin film
- 刊名：Journal of Electron Spectroscopy and Related Phenomena
- 出版年：2010
- 出版时间：August 2010
- 年：2010
- 卷：181
- 期：2-3
- 页码：164-167
- 全文大小：201 K
文摘
Threshold photoemission magnetic circular dichroism (MCD) for 12 monolayer (ML) Ni thin films grown on Cu(0 0 1) was measured with a total electron yield method. The obtained MCD asymmetry using the total electron yield method reaches as much as 10 % near the photoemission threshold. On the other hand, the MCD asymmetry in angle resolved photoemission spectra with the photon energy of 5.28 eV was also investigated for Cs/Ni(12 ML)/Cu(0 0 1) and was found to give a similar MCD asymmetry. The high MCD asymmetry in the total electron yield can be interpreted by the argument that the angle and energy selection is spontaneously achieved in the total electron yield near the photoemission threshold for low photon energy excitation.