Crossover between axial and radial magnetic anisotropy in self-organized permalloy nanowires

Salem MS, Nielsch K (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Materials Science and Engineering B-Advanced Functional Solid-State Materials Elsevier

Book Volume: 223

Pages Range: 120-124

DOI: 10.1016/j.mseb.2017.06.008

Abstract

Self-organized permalloy nanowire arrays embedded in hexagonally ordered nanochannels of anodic alumina membranes were produced by electrodeposition. The dimensions of the nanowires were tuned over a wide range by controlling the dimensions of the host alumina templates. Room temperature magnetic hysteresis revealed a considerable dependence of the magnetic anisotropy of the array on the nanowire dimensions. The magnetization direction of the nanowires was found to change from axial to longitudinal direction as both the diameter and length of the wire increased. The observed behavior was ascribed to the increase in magnetostatic coupling among nanowires, as confirmed by first-order reversal curve measurements. Theoretical calculations based on a simple magnetostatic model, which considers the dipolar interaction among the wires, estimated the critical dimensions of the nanowires at which the magnetic anisotropy changes from perpendicular to longitudinal direction.

Involved external institutions

Cairo University EG Egypt (EG) Universität Hamburg (UHH) DE Germany (DE)

How to cite

APA:

Salem, M.S., & Nielsch, K. (2017). Crossover between axial and radial magnetic anisotropy in self-organized permalloy nanowires. Materials Science and Engineering B-Advanced Functional Solid-State Materials, 223, 120-124. https://doi.org/10.1016/j.mseb.2017.06.008

MLA:

Salem, Mohamed Shaker, and Kornelius Nielsch. "Crossover between axial and radial magnetic anisotropy in self-organized permalloy nanowires." Materials Science and Engineering B-Advanced Functional Solid-State Materials 223 (2017): 120-124.

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