Cobalt nanoparticles deposited and embedded in AlN: Magnetic, magneto-optical, and morphological properties

Huttel, Yves; Gómez, H.; Clavero, C.; Cebollada, A.; Armelles, G.; Navarro, E.; Ciria, M.; Benito, L.; Arnaudas, J.I.; Kellock, A. J.

doi:10.1063/1.1767975

Cited by 23 publications

(12 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Potential applications range from nanostructured magnetic media [2] to catalysts in energy conversion and templates for the growth of semiconductor nanowires and CNTs [3]. Apart from this, the plasmonic resonance in metal nanoparticles is extremely sensitive to changes in the surroundings, making them suitable for biosensing, with diagnostic and therapeutic applications being developed [4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of cobalt nanoparticles on Si (100) by swift heavy ion irradiation

et al. 2013

View full text Add to dashboard Cite

We report the growth and characterization of uniform-sized nanoparticles of cobalt on n-type silicon (100) substrates by swift heavy ion (SHI) irradiation. The Co thin films of 25-nm thicknesses were grown by e-beam evaporation and irradiated with two different types of ions, 45-MeV Li3+ and 100-MeV O7+ ions with fluences ranging from 1 × 1011 to 1 × 1013 ions/cm2. SHI irradiation, with the beam rastered over the area of the film, resulted in the restructuring of the film into a dense array of Co nanostructures. Surface topography studied by atomic force microscopy revealed narrowed size distributions, with particle sizes ranging from 20 to 50 nm, formed through a self-organized process. Ion fluence-dependent changes in crystallinity of the Co nanostructures were determined by glancing angle X-ray diffraction. Rutherford backscattering spectroscopy analysis showed the absence of beam-induced mixing in this system. Surface restructuring and beam-induced crystallization are the dominant effects, with the nanoparticle size and density being dependent on the ion fluence. Results are analyzed in the context of molecular dynamics calculations of electron-lattice energy transfer.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis of cobalt nanoparticles on Si (100) by swift heavy ion irradiation

et al. 2013

View full text Add to dashboard Cite

show abstract

“…21͒ or Co on AlN. 22 In all cases, deposition at moderate temperatures reduces surface diffusion leading to a 2D growth mode, while increasing deposition temperature leads to a gradual 3D morphology.…”

Section: Morphological Evolution Of the Layersmentioning

confidence: 99%

Size effects in the magneto-optical response of Co nanoparticles

Clavero¹,

Cebollada²,

Armelles³

et al. 2005

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

A study of the magneto-optical ͑MO͒ spectral response of Co nanoparticles embedded in MgO as a function of their size and concentration in the spectral range from 1.4 to 4.3 eV is presented. The nanoparticle layers were obtained by sputtering at different deposition temperatures. Transmission electron microscopy measurements show that the nanoparticles have a complex structure which consists of a crystalline core having a hexagonal close-packed structure and an amorphous crust. Using an effective-medium approximation we have obtained the MO constants of the Co nanoparticles. These MO constants are different from those of continuous Co layers and depend on the size of the crystalline core. We associate these changes with the size effect of the intraband contribution to the MO constants, related to a reduction of the relaxation time of the electrons into the nanoparticles.

show abstract

“…A complete understanding of these systems is a challenging issue with potential applications in high-density data storage devices and magnetooptical sensors. 9 We examine the influence of both the nanoparticulate structure and the capping layer on the magnetic and magneto-optical properties. Kerr measurements are performed to study the collective magnetic behavior of each system.…”

Section: Introductionmentioning

confidence: 99%

Morphology and capping effects in the magnetic and magneto-optical properties of nanoparticulate Co films

et al. 2008

Self Cite

View full text Add to dashboard Cite

Magnetic and magneto-optical properties of Co films are studied as a function of the morphology and the capping layer. We show that the nanoparticulate structure of the Co films has a clear influence on the magnetic and magneto-optical properties of the system. Kerr measurements combined with x-ray magnetic circular dichroism provide evidence of a strong correlation between the collective magnetic behavior of the system and the individual atomic magnetic response. The influence of the magnetic nature of the capping layer ͑Al, Au, and Pt͒ is also analyzed. Polarized capping layers, such as Pt, magnetically couple the nanostructures and not only increase the effective anisotropy of the system but also enhance the atomic magnetic moment of Co and the global magneto-optical activity.

show abstract

Cobalt nanoparticles deposited and embedded in AlN: Magnetic, magneto-optical, and morphological properties

Cited by 23 publications

References 33 publications

Synthesis of cobalt nanoparticles on Si (100) by swift heavy ion irradiation

Synthesis of cobalt nanoparticles on Si (100) by swift heavy ion irradiation

Size effects in the magneto-optical response of Co nanoparticles

Morphology and capping effects in the magnetic and magneto-optical properties of nanoparticulate Co films

Contact Info

Product

Resources

About