Composition-dependent reorientation of magnetic anisotropy in electrodeposited CoNi nanowire arrays

Magnetic nanowires embedded in a porous template are under high attention of scientists because of the promising electronic applications. Electrodeposition enables one to fabricate magnetic “nanowired” substrates (MNWS), which are ideal candidates for high frequency utilizations due to their desirable materials properties and the possibility to build tunable nanomagnetic devices applicable for a tailored frequency range. Manipulation of the nanowire composition allows changing the crystal structure leading to the rotation of easy axis (e.a.) of magnetization in the arrays. In this paper, we report on the composition-dependent reorientation of magnetic anisotropy in CoNi nanowire arrays electrodeposited into an anodic alumina template using different deposition frequencies and electrolytes. Dimensionality and micromagnetic characteristics of the nanowire arrays with different orientation of magnetic anisotropy have been determined with processing of magnetization curves with approach to the magnetic saturation law.