Influence of magnetostatic interactions on the magnetization reversal of patterned magnetic elements

Journal Article · Fri Apr 01 04:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3567180· OSTI ID:21560137

Xioalu, Yin; Liou, S H ^[1]; Adeyeye, A O; Jain, S ^[2]; Baoshan, Han ^[3]

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1. Department of Physics and Astronomy, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, Nebraska 68588 (United States)
2. Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576 (Singapore)
3. State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 (China)

The magnetization reversal in patterned thin-film arrays of elliptical submicron permalloy elements has been investigated by magnetic-force microscopy and micro-magneto-optic Kerr effect. Three different spatial arrangements of chains are considered, namely chains aligned parallel to the long axis of the ellipse, chains aligned parallel to the short axis of the ellipse, and arrays with roughly equal element-to-element spacings in both directions. Comparison of the hysteresis loops in an in-plane field perpendicular to the ellipses' long axes shows that the magnetization reversibility is highest for chains along the long axis. This is due to the nearly coherent magnetization rotation in the applied magnetic field and to the formation of a head-to-tail domain arrangement. Other arrangements, such as chains of ellipses aligned parallel to short axis, yield flux-closure domains as the applied magnetic field is changed.

• OSTI ID: 21560137
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 109; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ATOMIC FORCE MICROSCOPY
CHAINS
CLOSURES
COMPARATIVE EVALUATIONS
DIELECTRIC PROPERTIES
ELECTRICAL PROPERTIES
EVALUATION
FILMS
HYSTERESIS
INTERACTIONS
IRON ALLOYS
KERR EFFECT
MAGNETIC FIELDS
MAGNETIZATION
MAGNETO-OPTICAL EFFECTS
MICROSCOPY
NICKEL ALLOYS
PERMALLOY
PHYSICAL PROPERTIES
THIN FILMS
TRANSITION ELEMENT ALLOYS