Influence of the electrodeposition potential on the crystallographic structure and effective magnetic easy axis of cobalt nanowires. Issue 17 (3rd February 2016)

• Record Type: Journal Article
• Authors: Irshad, M. I.; Mohamed, N. M.; Abdullah, M. Z.; Saheed, M. S. M.; Mumtaz, A.; Yasar, M.; Yar, A.; Zeeshan, M. A.; Sort, J.
• Is Part Of: RSC advances. Volume 6:Issue 17(2016)
• Page Start: 14266
• Page End: 14272
• Publication Date: 2016-02-03
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra01311b
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Cobalt nanowires (NWs) have been synthesized by electrodeposition inside the pores of anodized aluminium oxide templates, at different values of applied deposition potential. Abstract : Cobalt nanowires (NWs) have been synthesized by electrodeposition inside the pores of anodized aluminium oxide templates, at different values of applied deposition potential. The as-deposited NWs are parallel to one another and exhibit a high geometrical aspect ratio. The crystal structure of these NWs shows a strong dependence on the applied deposition potential during synthesis. X-ray diffraction indicates the predominance of hexagonal-closed-packed (HCP) phase with (002) texture at low applied deposition potentials, whereas a reorientation of the c -axis of the HCP structure is observed for high electrodeposition potentials. Moreover, for a given electrodeposition time, the length of the NWs also increases with the applied potential. As a result of these structural changes, a switch in the magnetic easy axis, from parallel to perpendicular to the NW axis, occurs depending on the applied potential. A simplified model is used to account for this reorientation of the effective magnetic anisotropy direction, which takes into account the interplay between shape anisotropy, magnetocrystalline anisotropy and interwire dipolar interactions.