Magnetization Reversal Characteristics in NiFe Elliptical Ring Arrays

• Published in: IEEE transactions on magnetics Vol. 46; no. 6; pp. 1975 - 1977
• Main Authors: Chang, Liang-Juan, Chen, Kuan-Yu, Lin, Lu-Kui, Yao, Yeong Der, Lin, Pang, Lee, Shang Fan
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Arrays; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Iron compounds; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetic field measurement; Magnetic fields; Magnetic films; Magnetic flux; Magnetism; Magnetization; Magnetization reversal; magnetooptic Kerr effect; Magnetostatics; Materials science; Nanomaterials; Nanostructure; Nickel base alloys; Nickel compounds; Other topics in materials science; Perpendicular magnetic anisotropy; Physics; Scanning electron microscopy; Shape control; Magnetic films; magnetooptic Kerr effect; Magnetic materials; Magnetization; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2010.2040593

The magnetization reversal processes of single-layer nanoscale elliptical ring arrays are examined. The magnetic field was applied parallel or perpendicular to the long axis. The magnetization hysteresis loops showed a simultaneous-reversal single-step transition or two-step transition involving flux closure vortex states. For various aspect ratios and thicknesses, the transition between single-step and double-step magnetization reversals was measured to form phase diagrams. Simulations of the magnetization reversal behavior agreed with our results.