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

Clavero, C.; Martínez, Lidia; García‐Martín, Antonio; García-Martín, José Miguel; Huttel, Yves; Telling, Neil D.; Laan, G. van der; Cebollada, A.; Armelles, G.

doi:10.1103/physrevb.77.094417

Cited by 12 publications

(12 citation statements)

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“…These simulations were performed by means of the transfer-matrix formalism 52,53 where the MO constants of Co were obtained from a reference 1.2 nm thick Co film 76 grown under identical conditions as the Co/ V samples. The agreement between the simulated spectra and the experimental data was not satisfactory, even when taking into account the reduction of the magnetic moment ͑observed by XMCD͒ in the Co films, which was introduced by a proportional decrease of the MO constants.…”

Section: B Magneto-optical Propertiesmentioning

confidence: 99%

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Interface effects, magnetic, and magneto-optical properties ofAl∕Co∕V∕MgO(100)structures

Huttel

Clavero²,

Laan

et al. 2008

Phys. Rev. B

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The magnetic and magneto-optical properties of Al/ Co/ V / MgO͑100͒ structures and the influence of the Co/ V interface for different thicknesses of the Co and V layers have been studied experimentally. From the element-specific hysteresis loops obtained by x-ray magnetic circular dichroism ͑XMCD͒ at the Co and V L 3 edges we find that the V layers are magnetically polarized antiparallel to the Co layers and that magnetization reversal occurs at the same magnetic field in both layers. The effect of the V atomic volume and the relative thicknesses of V and Co layers on the magnetic moments of the V and Co atoms are also studied. Contrary to what might be expected, the atomic magnetic moments of the V and Co atoms do not depend on the V atomic volume, however they depend strongly on the thicknesses of the V and Co layers. From the trend in the Co and V atomic magnetic moments as a function of Co and V thicknesses and the absence of any spectroscopic evidence for the formation of a VCo alloy, a long-range spin polarization of the V atoms is proposed. The extracted magneto-optical ͑MO͒ constants of V and Co as a function of photon energy clearly evidence a large amount of polarization in the V films in agreement with the XMCD results, which is indicative of the magnetic coupling between Co and V. The experimental MO results and simulations also show the strong influence of these polarized V layers in the MO properties of the complete system. These results, given the absence of spectroscopic evidence for the formation of a VCo alloy, support a long-range magnetization of the V atoms and a reduction of the Co atomic magnetic moments.

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Section: B Magneto-optical Propertiesmentioning

confidence: 99%

“…In the case of Co, the MO constants extracted from the 1.2 nm Co film 76 were fixed as reference MO constants ͑Fig. 9͒, assuming a magnetic moment value of ref Co = 1.77 B /atom.…”

Section: B Magneto-optical Propertiesmentioning

confidence: 99%

Interface effects, magnetic, and magneto-optical properties ofAl∕Co∕V∕MgO(100)structures

Huttel

Clavero²,

Laan

et al. 2008

Phys. Rev. B

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“…This large contrast confirms the morphological indication that Co adhesion depends on the crystallinity of Alq 3 measured surface. 10 The average grain size in the smoother areas is 30-40 nm.…”

Section: Interface Effects On An Ultrathin Co Film In Multilayers Basmentioning

confidence: 99%

Interface effects on an ultrathin Co film in multilayers based on the organic semiconductor Alq3

Sidorenko¹,

Pernechele²,

Lupo³

et al. 2010

Applied Physics Letters

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The effect of the AlOx barrier thickness on magnetic and morphological properties of Ta/Co/(AlOx)/Alq3/Si hybrid structures was systematically studied by means of atomic force microscopy, SQUID magnetometry and nuclear magnetic resonance (NMR). All used techniques pointed out that the barrier thickness of 2 nm is required to obtain a magnetically good cobalt layer on top of Alq3. 59 Co NMR measurements revealed that the AlOx barrier gives rise to the formation of an interface layer with "defective" cobalt favouring growth of "bulk" cobalt with good magnetic properties.

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“…In particular, it has been shown that the interface region between metallic nanoparticles and the matrix has different optical properties. 29 In Fig. 3, we present the dielectric constants of the complementary system, i.e., Co:Au NPs layers.…”

Section: A Optical Propertiesmentioning

confidence: 99%

Optical and magneto-optical properties of Au:Conanoparticles and Co:Aunanoparticles doped magnetoplasmonic systems

Martín-Becerra

García-Martín

Huttel

et al. 2015

Journal of Applied Physics

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

Cited by 12 publications

References 50 publications

Interface effects, magnetic, and magneto-optical properties ofAl∕Co∕V∕MgO(100)structures

Interface effects, magnetic, and magneto-optical properties ofAl∕Co∕V∕MgO(100)structures

Interface effects on an ultrathin Co film in multilayers based on the organic semiconductor Alq3

Optical and magneto-optical properties of Au:Conanoparticles and Co:Aunanoparticles doped magnetoplasmonic systems

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