Isotropic soft magnetic properties of CoFeAlCu films with (111) orientation

Jian Wang Cai, Osamu Kitakami, Yutaka Shimada

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The dynamic behavior of the magnetization for (111)-oriented films with cubic crystalline structures has been studied theoretically, and the permeability for such textured films has been confirmed to be isotropic. Meanwhile, Co-rich CoFeAlCu films with high saturation magnetization (4πMs=15.8 kG) and low magnetostriction (λs=1.3×10-6), prepared by the dc sputtering method, are found to exhibit perfect fcc (111) orientation with grain size of about 400 Å. A fairly good isotropic magnetic softness has been attained for CoFeAlCu films with Zr underlayers even in the as-sputtered state with Hc of about 1.5 Oe in every measuring direction. After annealing in a rotating magnetic field at 380 °C for 2 h, the magnetic softness is further improved with Hc as low as 0.85 Oe, and the permeability is isotropic in the film plane and as high as 500-600. The perfect (111) orientation of the CoFeAlCu films leads to the isotropic softness, which is consistent with the theoretical prediction.

Original languageEnglish
Pages (from-to)1625-1629
Number of pages5
JournalJournal of Applied Physics
Volume79
Issue number3
DOIs
Publication statusPublished - 1996 Feb 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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