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

Journal Article · Mon Dec 19 04:00:00 EST 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3670353· OSTI ID:22027849

Ito, Keita; Harada, Kazunori; Toko, Kaoru; Suemasu, Takashi ^[1]; Ye, Mao; Kimura, Akio ^[2]; Takeda, Yukiharu; Saitoh, Yuji ^[3]; Akinaga, Hiro ^[4]

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1. Institute of Applied Physics, University of Tsukuba, Ibaraki 305-8573 (Japan)
2. Graduate School of Science, Hiroshima University, Hiroshima 739-8526 (Japan)
3. Japan Atomic Energy Agency (JAEA), SPring-8, Hyogo 679-5198 (Japan)
4. National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8569 (Japan)

5-nm thick Co{sub 4}N layers capped with 3-nm thick Au layers were grown epitaxially on SrTiO{sub 3}(001) substrates by molecular beam epitaxy using solid Co and a radio-frequency NH{sub 3} plasma. Spin and orbital magnetic moments of the Co{sub 4}N 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 {mu}{sub B}, which is smaller than that predicted theoretically (1.58 {mu}{sub B}). The element-specific XMCD intensities for the Co L{sub 3} edge and N K edge show that the magnetic moment is induced at the N atoms.

• OSTI ID: 22027849
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 25 Vol. 99; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMMONIA
COBALT COMPOUNDS
CRYSTAL GROWTH
CRYSTAL STRUCTURE
FERROMAGNETIC MATERIALS
GOLD
LAYERS
MAGNETIC CIRCULAR DICHROISM
MAGNETIC MOMENTS
MOLECULAR BEAM EPITAXY
NITRIDES
PLASMA
SPIN
STRONTIUM TITANATES
SUBSTRATES
THIN FILMS
X RADIATION