Microstructural and magnetic properties of CoPt nanowires

Khurshid, Hafsa; Huang, Yandong; Bonder, M.J.; Hadjipanayis, G. C.

doi:10.1016/j.jmmm.2008.09.002

Cited by 22 publications

(8 citation statements)

References 17 publications

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“…The ordered tetragonal phase is easily synthesized by a thermal annealing of the disordered cubic structure. Most works on FePt or CoPt 1D nanostructures, dealth only with synthetic conditions and strategies for their preparation [444][445][446][447], while only a few of them reported on their magnetic characterization, which however was always quite superficial [448][449][450][451][452]. The preferred synthetic method for the fabrication of arrays of Pt-based magnetic nanowires is the electrodeposition of the metals in AAO templates [445,[453][454][455][456][457][458][459][460].…”

Section: Alloys Of Special Technological Interestmentioning

confidence: 99%

Physical properties of elongated inorganic nanoparticles

et al. 2011

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Section: Alloys Of Special Technological Interestmentioning

confidence: 99%

Physical properties of elongated inorganic nanoparticles

et al. 2011

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“…They provide opportunity to tune the nanowire diameter, spacing and center to center spacing [15]. Electrodeposition facilitates nanomaterial fabrication at low cost and energy over other conventionally used methods such as molecular beam epitaxy and lithography [16]. Control over the electrodeposition parameters (current density, bath acidity, etc.…”

Section: Materials Synthesismentioning

confidence: 99%

“…The AAO template were prepared by using a well-established method, the two-step anodization procedure [18]. Before anodizing, high purity (99.999%) aluminum foil was degreased in acetone and etched by sodium hydroxide (NaOH) to remove aluminum oxide surface layer [1,6,16,17]. The aluminum foil was anodized under constant voltage of 40 V in 0.3 M C 2 H 2 O 4 at 0 • C. The remaining aluminum was removed using a copper chloride solution.…”

Section: Materials Synthesismentioning

confidence: 99%

Tuning Easy Magnetization Direction and Magnetostatic Interactions in High Aspect Ratio Nanowires

et al. 2021

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Cobalt nanowires have been synthesized by electrochemical deposition using track-etched anodized aluminum oxide (AAO) templates. Nanowires with varying spacing-to-diameter ratios were prepared, and their magnetic properties were investigated. It is found that the nanowires’ easy magnetization direction switches from parallel to perpendicular to the nanowire growth direction when the nanowire’s spacing-to-diameter ratio is reduced below 0.7, or when the nanowires’ packing density is increased above 5%. Upon further reduction in the spacing-to-diameter ratio, nanowires’ magnetic properties exhibit an isotropic behavior. Apart from shape anisotropy, strong dipolar interactions among nanowires facilitate additional uniaxial anisotropy, favoring an easy magnetization direction perpendicular to their growth direction. The magnetic interactions among the nanowires were studied using the standard method of remanence curves. The demagnetization curves and Delta m (Δm) plots showed that the nanowires interact via dipolar interactions that act as an additional uniaxial anisotropy favoring an easy magnetization direction perpendicular to the nanowire growth direction. The broadening of the dipolar component of Δm plots indicate an increase in the switching field distribution with the increase in the nanowires’ diameter. Our findings provide an important insight into the magnetic behavior of cobalt nanowires, meaning that it is crucial to design them according to the specific requirements for the application purposes.

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“…Some other groups also fabricated Co x Pt 100-x nanowires with 7 < x < 100; most of the cases reported coercivity values of around 1-3 kOe, which were in some cases noticeably affected by thermal annealing at temperatures around 600-700°C (Li and Shen, 2005;Gao et al, 2006;Shamaila et al, 2008;Khurshid et al, 2009;Wen et al, 2013b;Cortés et al, 2013).…”

Section: Co-pt Nanowiresmentioning

confidence: 99%