Local magnetic anisotropy controlled by a surface nano-modulation

2009/01/19 by Joel Briones, Briones, J., F. Montaigne +7
Engineering · Physics and Astronomy · #FOS: Physical sciences #Magnetic Field Sensors Techniques #Magnetic properties of thin films #Magneto-Optical Properties and Applications #Materials Science (cond-mat.mtrl-sci)

paper · pdf · doi:10.48550/arxiv.0901.2617

openalex publication_date 2009/01/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A topological modulation of magnetic thin films can induce a magnetic anisotropy of magnetostatic origin. In this letter, we report on the magnetic properties of NiFe layers deposited on wavy shaped Si substrates. Without any modulation, our films always present an intrinsic anisotropy. We show unambiguously that patterning the substrate can overcome this anisotropy and even impose a different easy axis of magnetization. This allows the definition of two orthogonal easy axes at different places on the same substrate. This control of anisotropy both in direction and intensity paves the way to the realization of high precision bidimensional magnetic sensors.

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