Title :
Analysis of Magnetic Relaxation With Pre-Existing Nucleation Sites Based on the Fatuzzo–Labrune Model
Author :
Duy-Truong Quach ; Handoko, Djati ; Sang-Hyuk Lee ; Je-Ho Shim ; The-Long Phan ; Duc-Thang Pham ; Kyung-min Lee ; Jong-Ryul Jeong ; Duc-The Ngo ; Dong-Hyun Kim
Author_Institution :
Dept. of Phys., Chungbuk Nat. Univ., Cheongju, South Korea
Abstract :
Time-resolved magnetic domain patterns of (Co/Pt) and (CoFeB/Pd) multi-layers with a perpendicular magnetic anisotropy are observed by means of magneto-optical microscopy, from which magnetic relaxation curves are determined via a quantitative image analysis. Interestingly, it has been observed that the relaxation processes starting with pre-existing nucleation sites, as well as starting from a fully saturated state, are well explained based on the Fatuzzo-Labrune model, although the pre-existing nucleation sites significantly modify the magnetization reversal behaviors.
Keywords :
boron alloys; cobalt; cobalt alloys; ferromagnetic materials; iron alloys; magnetic domains; magnetic multilayers; magnetic relaxation; magnetic thin films; magnetisation reversal; magneto-optical effects; metallic thin films; nucleation; optical microscopy; palladium; perpendicular magnetic anisotropy; platinum; time resolved spectra; Co-Pt; CoFeB-Pd; Fatuzzo-Labrune model; fully saturated state; magnetic relaxation; magnetization reversal; magneto-optical microscopy; multilayers; perpendicular magnetic anisotropy; preexisting nucleation sites; quantitative image analysis; time-resolved magnetic domain patterns; Films; Magnetic domains; Magnetic multilayers; Magnetization reversal; Microscopy; Nonhomogeneous media; Perpendicular magnetic anisotropy; Fatuzzo-Labrune model; Fatuzzo???Labrune model; magnetization reversal mechanism; pre-existing nucleation sites; relaxation process;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2443855
