Magnetic field-dependent shape anisotropy in small patterned films studied using rotating magnetoresistance

Abstract

Based on the electric rotating magnetoresistance method, the shape anisotropy of a Co microstrip has been systematically investigated. We find that the shape anisotropy is dependent not only on the shape itself, but also on the magnetization distribution controlled by an applied magnetic field. Together with micro-magnetic simulations, we present a visualized picture of how non-uniform magnetization affects the values and polarities of the anisotropy constants and . From the perspective of potential appliantions, our results are useful in designing and understanding the performance of micro- and nano-scale patterned ferromagnetic units and the related device properties.

Experimental Determination of the Orientation of Tilted Magnetic Anisotropy by Using Angle-Resolved Hall Effect Signals

“…4(c). This type of magnetic field dependence of the magnetic anisotropy has been previously reported in the literature [40,41]. Fan et al explained the origin of this behaviour with a non-uniform magnetization in such systems.…”

“…Fan et al explained the origin of this behaviour with a non-uniform magnetization in such systems. [41]. 3).…”

Dynamic magnetic characterization and magnetic particle imaging enhancement of magnetic-gold core–shell nanoparticles

“…It is contributed by various factors such as magnetocrystalline anisotropy which primarily arises from spin-orbit coupling and shape anisotropy which originates from dipole-dipole interactions. 37,38 Therefore, the magnetic anisotropy energy of nanoparticles is affected by various parameters including particle size, dipole-dipole interactions, distortions, and electronic hybridization at the nanoparticle interface, assuming a fixed chemical composition. 39,40 The anisotropy constant of MNPs has been reported to differ from that of bulk and varies with the particle size.…”

Patterned FeNi soft magnetic strips film with tunable resonance frequency from 1 to 10.6 GHz

“…To study IPUMA field in more detail, effective H k are calculated from hysteresis loops and the results are listed in Table 1 . H k increases from 2.2 to 172.4 Oe when the width decreases from 500 to 15 μm , so it is a useful method to adjust the IPUMA field by changing N which is related to the demagnetization field 20 .…”