Magnetic and magneto-optical properties of co-sputtering FePt films

Jing Gao, Chao Lin Zha, Bin Ma, Song You Wang, Zong Zhi Zhang, Qing Yuan Jin

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

FePt thin films have been prepared at different substrate temperatures by DC magnetron co-sputtering. The films change from a disordered fee structure to a L10 fct structure with temperature. The magnetic and the magneto-optical properties of those FePt films have been studied. The dependence of spectral changes on the formation of a chemically-ordered L1 0structure is observed in the polar magneto-optical Kerr rotation. In the spectra, the ultraviolet peak located in the high-energy range (4.0 - 4.5 eV), which is related to electronic transitions on Pt atomic sites, is observed for all samples. On the contrary, the peak related to transitions on Fe atomic sites, which is located in the low-energy range (1.5 - 2.0 eV), is only observed for highly chemically-ordered samples. Compared with the spectra for the L10 structure of FePt films prepared by using molecular beam epitaxy, the infrared peak related to Fe sites is shifted to low energy.

Original languageEnglish (US)
Pages (from-to)2099-2102
Number of pages4
JournalJournal of the Korean Physical Society
Volume49
Issue number5 I
StatePublished - Nov 1 2006

Keywords

  • Chemical ordering
  • Co-sputtering
  • FePt film
  • Magneto-optical spectra

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