HIGH ENERGY RESOLUTION MAGNETIC CIRCULAR DICHROISM MEASUREMENT OF THE FERRITE FAMILY

Akane Agui, Yuji Saitoh, Akitaka Yoshigoe, Takeshi Nakatani, Tomohiro Matsushita and Masaichiro Mizumaki
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Akane Agui: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute (JAERI), SPring-8, Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan
Yuji Saitoh: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute (JAERI), SPring-8, Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan
Akitaka Yoshigoe: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute (JAERI), SPring-8, Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan
Takeshi Nakatani: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute (JAERI), SPring-8, Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan
Tomohiro Matsushita: Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan
Masaichiro Mizumaki: Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5198, Japan

Surface Review and Letters (SRL), 2002, vol. 09, issue 02, 843-848

Abstract: Magnetic circular dichroism (MCD) spectra of spinel ferritesMFe2O4(M = Co, Mn, Fe, Co and Ni) have been measured by using a photon-helicity-switching method. The method achieves high energy resolution and a low noise-to-signal ratio. The FeL2,3absorption spectra ofMFe2O4show a similar spectral profile; on the other hand, the MCD spectra show the characteristic fine structures. These differences are attributed to the variety of3delectron configuration of Fe ions (Fe2+orFe3+) and the local symmetry (tetrahedral or octahedral). The origin of the positive peak ofMFe2O4(M = Fe, Co and Ni) MCD spectra at theL3edge is attributed to the tetrahedralFe3+(3d5)state.

Date: 2002
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DOI: 10.1142/S0218625X02003032

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