X-ray absorption spectroscopy and magnetic circular dichroism in codeposited C60-Co films with giant tunnel magnetoresistance

Yoshihiro Matsumoto, Seiji Sakai, Yasumasa Takagi, Takeshi Nakagawa, Toshihiko Yokoyama, Toshihiro Shimada, Seiji Mitani, Hiroshi Naramoto, Yoshihito Maeda

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17 Citations (Scopus)

Abstract

Electronic and spin states of the codeposited C60-Co films with large tunnel magnetoresistance (TMR) effect were investigated with the X-ray absorption and magnetic circular dichroism (MCD) spectroscopies. It is revealed that a C60-Co compound generated in the C60-Co films shows the clear MCD signal attributed to the spin-polarized Co 3d states hybridized with C60 π orbitals. The magnetic response of these Co 3d-derived states agrees well with temperature dependence of the observed MR ratios of the granular C60-Co films. This suggests the incorporation of the spin-polarized Co 3d-derived states of the C60-Co compound into the observed TMR effect.

Original languageEnglish
Pages (from-to)244-248
Number of pages5
JournalChemical Physics Letters
Volume470
Issue number4-6
DOIs
Publication statusPublished - Mar 5 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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