Abstract
The better understanding of magnetization reversal in impurity added magnetic nanowires (NWs) would allow for their efficient use in future anisotropic spintronic devices. Herein, a pulsed electrodeposition method was employed to fabricate CoCr NW arrays in anodic aluminum oxide membranes with different pore diameters ranging from 30 to 60 nm. Hysteresis loop and first-order reversal curve measurements were used to evaluate magnetic properties and reversal modes of the resulting NWs, indicating the effective role of the NW diameter in the magnetization reversal. While a soft magnetic phase with local magnetostatic interactions was observed for 60 nm diameter NWs, soft and hard magnetic phases together with a wide distribution of magnetic interactions were evidenced for CoCr NWs with a diameter of 30 nm. A transverse domain wall mode was estimated to be responsible for the magnetization reversal at the diameter of 30 nm, whereas a combination of vortex and transverse domain wall propagation played a role at diameters equal and greater than 40 nm. The magnetic characteristics of the CoCr NWs were found to arise from changes in the magnetocrystalline anisotropy contribution oriented along the [100] direction, weakening coercivity, and squareness when increasing the NW diameter.
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
Abbreviations
- NWs:
-
Nanowires
- AAO:
-
Anodic aluminum oxide
- PED:
-
Pulsed electrodeposition
- FORC:
-
First-order reversal curve
- CFD:
-
Coercive field distribution
- IFD:
-
Interaction field distribution
- TDW:
-
Transverse domain wall
- VDW:
-
Vortex domain wall
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All authors have participated in (a) conception and design, or analysis and interpretation of the data; (b) drafting the article or revising it critically for important intellectual content; and (c) approval of the final version. The contribution of each author of our manuscript is as follows: B. Alirezaei performed experiments, analyzed data, and co-wrote the paper. S. Samanifar supervised the research, designed and performed experiments, analyzed data, and co-wrote the paper. A. Ghasemi supervised the research, designed experiments, and co-wrote the paper. A. J. Rashidi supervised the research, designed experiments, and co-wrote the paper. E. Paimozd supervised the research, designed and performed experiments, and co-wrote the paper.
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Alirezaei, B., Samanifar, S., Ghasemi, A. et al. Magnetic Properties and Reversal Modes of Electrodeposited CoCr Nanowire Arrays with Different Diameters. J Supercond Nov Magn 34, 3199–3208 (2021). https://doi.org/10.1007/s10948-021-05982-z
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DOI: https://doi.org/10.1007/s10948-021-05982-z