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Title: Electrodeposited Co{sub 93.2}P{sub 6.8} nanowire arrays with core-shell microstructure and perpendicular magnetic anisotropy

We demonstrate the formation of an unusual core-shell microstructure in Co{sub 93.2}P{sub 6.8} nanowires electrodeposited by alternating current (ac) in an alumina template. By means of transmission electron microscopy, it is shown that the coaxial-like nanowires contain amorphous and crystalline phases. Analysis of the magnetization data for Co-P alloy nanowires indicates that a ferromagnetic core is surrounded by a weakly ferromagnetic or non-magnetic phase, depending on the phosphor content. The nanowire arrays exhibit an easy axis of magnetization parallel to the wire axis. For this peculiar composition and structure, the coercivity values are 2380 ± 50 and 1260 ± 35 Oe, parallel and perpendicular to the plane directions of magnetization, respectively. This effect is attributed to the core-shell structure making the properties and applications of these nanowires similar to pure cobalt nanowires with an improved perpendicular anisotropy.
Authors:
;  [1] ; ; ; ; ;  [2] ;  [3] ;  [4]
  1. Faculty of Materials Engineering, Sahand University of Technology, Tabriz 51335-1996 (Iran, Islamic Republic of)
  2. School of Natural Sciences, Far Eastern Federal University, Vladivostok (Russian Federation)
  3. Institute of Physics, SB Russian Academy of Sciences, Krasnoyarsk 660036 (Russian Federation)
  4. Department of Physics, University of Bath, Bath (United Kingdom)
Publication Date:
OSTI Identifier:
22410168
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALTERNATING CURRENT; ALUMINIUM OXIDES; AMORPHOUS STATE; ANISOTROPY; BORON ADDITIONS; COBALT; COBALT BASE ALLOYS; COERCIVE FORCE; CRYSTALS; ELECTRODEPOSITION; FERROMAGNETIC MATERIALS; FERROMAGNETISM; MAGNETIZATION; MICROSTRUCTURE; NANOWIRES; PHASE STUDIES; TRANSMISSION ELECTRON MICROSCOPY