Nanostructure and magnetization reversal process in TbFeCo/Yx(FeCo)1−x spring-magnet type multilayers

• Published in: Journal of magnetism and magnetic materials Vol. 282; no. 1; pp. 44 - 48
• Main Authors: Duc, N.H., Huong Giang, D.T., Chau, N.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.11.2004; Elsevier Science
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Giant magnetostriction; Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures); Magnetic properties and materials; Magnetic properties of nanostructures; Magnetic properties of surface, thin films and multilayers; Magnetization reversal; Magnetomechanical and magnetoelectric effects, magnetostriction; Nanocrystalline structure; Physics; Spring-exchange multilayers; Magnetization reversal; Nanocrystalline structure; 81.07.Bc; Spring-exchange multilayers; 75.70.Cn; 75.60.Jk; Giant magnetostriction; Magnetostriction; Yttrium alloys; Iron alloys; Coexistence; Amorphous state; Nanostructures; Amorphous phase; Thickness; Terbium alloys; Multilayers; Spring exchange magnet; Coercive force; 81.07.Bc Spring-exchange multilayers; Cobalt alloys; Nanocrystal; Transition element alloys; Crystal structure; Terbium
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2004.04.010

Studies of the naturally formed nanostructure and magnetization reversal process were performed for the sputtered Tb(Fe0.55Co0.45)1.5/Yx(Fe0.7Co0.3)1−x multilayers (0⩽x⩽0.2) with a TbFeCo layer thickness tTbFeCo=12nm and YFeCo layer thickness tYFeCo=10nm. The structural investigations showed that nanocrystals are naturally formed and coexist within the amorphous matrix in Y0.1(FeCo)0.9 layers. In this state, low magnetic coercivity and large parallel magnetostrictive susceptibility are observed. The results are discussed in terms of the crystalline discontinuity of the soft YFeCo layers.