In-plane anisotropy of coercive field in permalloy square ring arrays.

Conference · Sat Apr 15 00:00:00 EDT 2006 · J. Appl. Phys.

DOI:https://doi.org/10.1063/1.2171949· OSTI ID:915320

Goncharov, A V; Zhukov, A A; Metlushko, V V; Bordignon, G; Fangohr, H; Karapetrov, G; Ilic, B

Magnetic ring arrays are promising candidates for application in magnetic random access memory devices. The magnetic reversal processes and anisotropy of the coercivity in arrays of square-shaped nanorings with different spacings were investigated by vector magneto-optical Kerr effect magnetometry, magnetic force microscopy, and micromagnetic simulations. Two-step magnetization reversal demonstrates fourfold symmetry in the film plane resulting from the shape anisotropy in rings. Our numerical simulations show good agreement with the experiment.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); FOR; National Science Foundation (NSF)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 915320
• Report Number(s): ANL/MSD/CP-117266; JAPIAU; TRN: US200817%%457
• Journal Information: J. Appl. Phys., Vol. 99, Issue 8 ; Apr. 15, 2006; Conference: 50th Conference on Magnetism and Magnetic Materials (MMM 2005); Oct 30 - Nov 3, 2005; San Jose, CA; ISSN 0021-8979
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
ATOMIC FORCE MICROSCOPY
KERR EFFECT
MAGNETIC FIELDS
MAGNETIC MATERIALS
MAGNETISM
MAGNETIZATION
MEMORY DEVICES
PERMALLOY
SHAPE
SYMMETRY
VECTORS