X-ray magnetic circular dichroism of ferromagnetic Co 4N epitaxial films on SrTiO 3(001) substrates grown by molecular beam epitaxy

Keita Ito, Kazunori Harada, Kaoru Toko, Mao Ye, Akio Kimura, Yukiharu Takeda, Yuji Saitoh, Hiro Akinaga, Takashi Suemasu

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17 Citations (Scopus)

Abstract

5-nm thick Co 4N layers capped with 3-nm thick Au layers were grown epitaxially on SrTiO 3(001) substrates by molecular beam epitaxy using solid Co and a radio-frequency NH 3 plasma. Spin and orbital magnetic moments of the Co 4N layers were estimated using x-ray magnetic circular dichroism (XMCD) measurements at 300 K. The site-averaged Co 3d spin magnetic moment is evaluated to be about 1.4 B, which is smaller than that predicted theoretically (1.58 B). The element-specific XMCD intensities for the Co L 3 edge and N K edge show that the magnetic moment is induced at the N atoms.

Original languageEnglish
Article number252501
JournalApplied Physics Letters
Volume99
Issue number25
DOIs
Publication statusPublished - 2011 Dec 19

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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