MAGNETIC CIRCULAR DICHROISM OF 4d–4fRESONANT X-RAY EMISSION FOR GADOLINIUM AND TERBIUM

Yasuhiro Takayama, Hideo Ohtsubo, Motoki Shinoda, Kenji Obu, Chol Lee, Hidetsugu Shiozawa, Hiroyoshi Ishii, Tsuneaki Miyahara and Jun Okamoto
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Yasuhiro Takayama: Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Tokyo 192-0397, Japan
Hideo Ohtsubo: Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Tokyo 192-0397, Japan
Motoki Shinoda: Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Tokyo 192-0397, Japan
Kenji Obu: Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Tokyo 192-0397, Japan
Chol Lee: Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Tokyo 192-0397, Japan
Hidetsugu Shiozawa: Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Tokyo 192-0397, Japan
Hiroyoshi Ishii: Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Tokyo 192-0397, Japan
Tsuneaki Miyahara: Department of Physics, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Tokyo 192-0397, Japan
Jun Okamoto: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute, 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan

Surface Review and Letters (SRL), 2002, vol. 09, issue 02, 837-841

Abstract: We have measured the magnetic circular dichroism (MCD) of X-ray emission spectra (XES) for gadolinium and terbium in the 4d–4f resonant excitation region. Clear MCD signals in the XES were observed and they dramatically changed as the excitation energy changed. Especially, an extremely large MCD signal appeared with the8Dresonant excitation for gadolinium. Comparison between the MCD for XES and total photoelectron yield (TEY) shows that the XES are very insensitive to the surface state. As a result, the measurement of XES was proved to be a superior technique for estimating the genuine magnetic moment in the bulk.

Date: 2002
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DOI: 10.1142/S0218625X02003020

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