Magnetic properties of Co–Si alloy clusters

Jo, Chulsu; Kim, Dong-Chul; Lee, Jae Il

doi:10.1016/j.jmmm.2006.02.236

Cited by 10 publications

(9 citation statements)

References 21 publications

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“…The most recent Co-Si phase diagram [25] exhibits the CoSi 2 , CoSi,  -Co 2 Si and Co 3 Si intermetallic phases of known crystallographic structures reported in [26], i.e., while the structure of  -Co 2 Si was not yet determined [27]. It is worthwhile to mention that the experimental data used for the optimization of the Co-Si phase diagram [24,25] are in good agreement within experimental errors.…”

Section: Accepted M Manuscriptmentioning

confidence: 62%

“…where 3 n is the number of associates, 1 n and 2 n are the numbers of the constituent atoms A and B , respectively, and N is the Avogadro number. associates formation and the reduction in total free energy due to the formation of associates,…”

Section: The Cfm and The Qca For Regular Solution: Thermodynamic And mentioning

confidence: 99%

“…The epitaxially grown cobalt silicides on Si have been used to fabricate a fast metal based transistor [2]. In particular, cobalt disilicide is thermally and chemically stable material as well as an excellent conductor and CoSi 2 nanoclusters are recently applied as contacts, gate electrodes and interconnects in nanoelectronics [3]. Selection of composites and processing routes to design materials on the basis of cost for equivalent performance indicate the melt infiltration as one of the most important processing steps in composites manufacturing [1].…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic, surface and structural properties of liquid Co-Si alloys

Novaković

Giuranno

Caccia

et al. 2016

Journal of Molecular Liquids

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The knowledge of thermophysical properties of liquid Co-Si alloys is a key requirement for manufacturing of composite materials by infiltration method. Despite this need, the experimental and predicted property data of the Co-Si system are scarce and often inconsistent between the various sources. In the present work the mixing behaviour of Co-Si melts has been analyzed through the study of the concentration dependence of various thermodynamic, surface (surface tension and surface composition) and structural properties (concentration fluctuations in the long-wavelength limit and chemical short-range order parameter) in the framework of the Compound Formation Model (CFM) and Quasi Chemical Approximation for regular solutions (QCA). In addition, the surface tension of the Co 22.5 Si 77.5 (in at %) eutectic alloy, that is proposed to be used as the infiltrant, has been measured by the pendant drop method at temperatures ranging from 1593 to 1773 K. The results obtained were discussed with respect to both, temperature and concentration, and subsequently compared with the model predictions and literature data.

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Section: Accepted M Manuscriptmentioning

confidence: 62%

Section: The Cfm and The Qca For Regular Solution: Thermodynamic And mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamic, surface and structural properties of liquid Co-Si alloys

Novaković

Giuranno

Caccia

et al. 2016

Journal of Molecular Liquids

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“…The relative intensity of this peak, in respect to the Co-Co one, increases as the Co layer thickness decreases. Accounting for the distance estimated, and considering that Si coordination with Co typically has a distance around 2.3 Å , 38,39 we can assume that this peak is related to Co-N bonds, likely located at the interface regions. EXAFS analysis has been performed by fitting the contribution to the EXAFS signal provided by the nearest neighbors (see Fig.…”

Section: Xasmentioning

confidence: 99%

Magnetic properties and short-range structure analysis of granular cobalt silicon nitride multilayers

Jiménez-Villacorta

Espinosa

Céspedes

et al. 2011

Journal of Applied Physics

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Effects of spacer thickness on perpendicular anisotropy L10-FePt/TiN/L10-FePt pseudo spin valves J. Appl. Phys. 111, 083909 (2012) Co/Au multilayers with graded magnetic anisotropy for magnetic field sensing Appl. Phys. Lett. 100, 162402 (2012) Design and micromagnetic simulation of the L10-FePt/Fe multilayer graded film J. Appl. Phys. 111, 073910 (2012) Precession frequency and fast switching dependence on the in-plane and out-of-plane dual spin-torque polarizers Appl. Phys. Lett. 100, 142409 (2012) Enhancement of perpendicular magnetic anisotropy through reduction of Co-Pt interdiffusion in (Co/Pt) multilayers Appl. Phys. Lett. 100, 142410 (2012) Additional information on J. Appl. Phys. The magnetic properties and local order of cobalt/silicon nitride metal-insulator multilayered system have been studied. Magnetization characterization reveals an evolution of the magnetic features by varying the metal layer thickness. Results show that multilayers with larger metal thickness (t) present a pure ferromagnetic character, whereas samples with t < 2 nm exhibit a granular superparamagnetic behavior, as it corresponds to discontinuous metal-insulator materials. An important decrease in the magnetization values for the clustered samples has also been observed. X-ray absorption near edge spectroscopy (XANES) and extended x-ray absorption fine structure (EXAFS) at the Co K-edge have been used to determine the local order and electronic configuration around cobalt. Results reveal the formation of an intermediate CoN phase likely located at the Co/Si 3 N 4 interface. Further insight in the electronic structure of cobalt atoms has been investigated through ab-initio XANES calculations based on Green function's multiple scattering formalism. Local-projected density of states (l-DOS) obtained by simultaneous computations has unveiled the effects of the nitrogen coordination in the electronic structure of the metal atom around the Fermi energy.

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“…Joa et al [13] showed that CoSi phase cluster with icosahedron structure has the largest binding energy and amount of charges transfer than CoSi 2 and Co 2 Si phase cluster, indicating that magnetic moment of the Co-Si alloy clusters with icosahedron structure increase with the Co concentration. In addition, the Si atoms in the CoSi phase with icosahedron structure have negative magnetic moment.…”

Section: Magnetic Propertiesmentioning

confidence: 99%