Article

Journal of Materials Science

, Volume 46, Issue 23, pp 7545-7550

Tailoring coercivity and magnetic anisotropy of Co nanowire arrays by microstructure

  • Yong RenAffiliated withState Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology
  • , Jianbo WangAffiliated withKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University Email author 
  • , Qingfang LiuAffiliated withKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
  • , Yingying DaiAffiliated withKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
  • , Bin ZhangAffiliated withKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University
  • , Longgang YanAffiliated withKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

To tailor coercivity and magnetic anisotropy, we have fabricated Co nanowire arrays in the pores of anodic aluminum oxide templates by electrodeposition. Microstructure measurements performed by X-ray diffraction show that Co nanowire arrays are hexagonal close-packed (HCP) structures with different crystalline textures. A wide range in change of coercivity from 925 to 3310 Oe at 300 K, with a maximum of up to 4050 Oe at 5 K, can be found for nanowire arrays with a diameter of 20 nm. This may be the highest value and the widest range of coercivity reported for Co nanowires prepared by electrodeposition method. This finding could be attributed to the adjustment of the microstructure of the cobalt nanowire arrays prepared in different experimental conditions. We have also investigated the relationship between the crystalline textures and the magnetic properties of Co nanowire arrays using micromagnetic simulation combined with microstructure measurements. The preferred orientation of nanowire arrays, such as (1000) or (0002), is a key factor in determining coercivity. This wide tailoring of coercivity makes possible more promising applications of Co nanowire arrays with fixed diameter and length.