Magnetic properties of CoPtCr thin films with 〈112̄0〉 crystal orientation

Abstract

The microstructure and magnetic properties of CoPtCr thin films with 〈112̄0〉 restricted fiber texture grown on (100) planes of Cr single-crystal films were characterized and subsequently correlated with the domain configuration during the magnetization reversal process. These films exhibited a bicrystal mode associated with two orthogonal easy axes of magnetization in the plane of the film. The domain configuration of these films during the magnetization-reversal process consisted of two sets of domains extending in two orthogonal directions. These properties were compared with those of CoPtCr films with random crystallographic orientation.

Epitaxial Ag templates on Si(001) for bicrystal CoCrTa media

“…2 Two effective easy axes emerge along the Cr͓100͔ and Cr͓010͔ directions yielding higher values of coercivity (H c ), remanence squareness (S), and coercivity squareness (S*), while the Cr͓110͔ and Cr͓110͔ directions become effective hard axes with lower H c , S, and S*. Several articles have reported successfully fabricated bicrystal thin-film samples on NaCl͑001͒, 3 Cr͑001͒, 2 MgO͑001͒, 4 and LiF͑001͒ 5 single crystal substrates. In this study, we report the use of Ag thin films epitaxially grown on hydrofluoric acid ͑HF͒-etched Si͑001͒ wafers as templates for the growth of bicrystal CoCrTa/Cr thin films.…”

Thin film magnetic recording media

“…The [0001]Co direction can be rotated through 90 • with a reasonable fit between the atomic patterns in the Co and Cr interfaces. This so-called 'bicrystal' relationship has been observed for growth on Cr [41] and on Cr on single-crystalline MgO [42]. The mutually perpendicular orientation of the c axes in contiguous grains of the Co alloy has been observed by high-resolution electron microscopy [42].…”

Co-Sm (1̄100)[0001]//Cr (1̄21̄ )[1̄01] epitaxy and its effects on magnetic properties of Co-Sm//Cr films

“…Such structure has been named bicrystal. 3,4 The third kind of microstructure is produced by depositing the Co alloy on a scratched ͑100͒ Cr single crystal. As a result, the c axis of the crystallites are aligned in one ͓110͔ direction only and the film has uniaxial anisotropy.…”