Magnetic Compton profile evaluation of magnetization process of TbxCo100−x films. (25th October 2017)

• Record Type: Journal Article
• Authors: Agui, Akane; Ma, Chuang; Liu, Xiaoxi; Tsuji, Naruki; Adachi, Misaki; Shibayama, Akane; Suzuki, Kosuke; Sakurai, Hiroshi
• Is Part Of: Materials research express. Volume 4:Number 10(2017)
• Publication Date: 2017-10-25
• Subjects: 07.55.Jg magnetometers for susceptibility, magnetic moment, and magnetization measurements -- 75.50.Gg ferrimagnetics -- 75.50.Kj amorphous and quasicrystalline magnetic materials -- 75.50.Ss magnetic recording materials -- 75.60.Ej magnetization curves, hysteresis, Barkhausen and related effects; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aa91e3
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: An understanding of the microscopic processes underlying the magnetization of the thin films is essential to the design and development of efficient magnetic recording media. In this context, we measure the magnetic Compton profile (MCP) of Tb x Co100− x films (13 ⩽ x ⩽ 20) and investigate the microscopic (spin magnetic moment ( μ s p i n ), orbital magnetic moment ( μ o r b i t a l ), and element specific magnetic moment ( μ T b and μ C o )) magnetization processes. Using the magnetic-field dependence of MCP, we obtain the spin- and orbital-specific magnetization curves (SSMH and OSMH, respectively). From the profile-fitting analysis, we also obtain the element specific SSMH curves, and we find from our results that the ratio μ s p i n / μ o r b i t a l is nearly constant. Thus, it is assumed that the magnetic switching processes of μ s p i n and μ o r b i t a l cooperatively occur in this system (corresponding to μ C o t o t a l and μ T b t o t a l ). In addition, we observe that μ s p i n / μ o r b i t a l and μ C o t o t a l / μ T b t o t a l are −1 at x ∼ 17. This implies that the magnetic moment of Tb aligns toward the magnetic field in the region of x > 17 and that of Co aligns toward the magnetic field in the region of x < 17. We estimate that this value of x ∼ 17 is the compositional point that corresponds to the compensation composition of Tb and Co.