Change of the electrical properties of granular CoFeB–SiOn nanocomposites after heat treatment

Stognei, O. V.; Slyusarev, V. A.; Kalinin, Yu. E.; Ситников, А. В.; Kopitin, M. N.

doi:10.1016/s0167-9317(03)00359-9

Cited by 12 publications

(2 citation statements)

References 9 publications

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“…A similar reaction of composites on the thermal action was observed in oxide-based composites (CoFeB-SiO 2 ) [7]. The magnetoresistance of the composites decreased after annealing if the concentration of metal phase was larger than the percolation threshold.…”

Section: Figsupporting

confidence: 63%

Magnetotransport properties of Co_х(MgF₂)_100-x oxygen-free nanocomposites

et al. 2018

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Abstract. Electric and magnetoresistive properties of Co х (MgF 2 ) 100-х thin films (14 ≤ x, ат. % ≤ 62) were investigated. It is established that the received films have a composite structure. Magnetoresistive and electric properties of the films in initial state and after heat treatment have been investigated. The magnetoresistive effect of the studied samples in initial state reaches 7,5% in magnetic field of 10 kOe. It is established that the composites structure is steady against thermal heating up to 250 °C. The change of composites magnetoresistive effect after heat treatment depends on the Co concentration. The particularities of the magnetoresistive changes after annealing are discussed.

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Section: Figsupporting

confidence: 63%

Magnetotransport properties of Co_х(MgF₂)_100-x oxygen-free nanocomposites

et al. 2018

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“…All these features can be observed within one composite system when the ratio between metal and dielectric phases is being changed. Being dependent on mentioned factors the tunneling magnetoresistance shows complicated concentration and temperature dependence as well as sensitivity to external influence (heat or electric field treatment) and preparation conditions [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Tunnel Magnetoresistive Effect in Nanostructured Composite Systems

2018

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The results of the investigation of tunnel magnetoresistive effect in a large number of metal-dielectric nanocomposites obtained by the same technology and under identical conditions are presented. The composites with multi-elemental amorphous metal phase were considered. It has been shown that the large values of the tunnel magnetoresistive effect in these composites are ensured when the value of the density of electronic states on the Fermi surface is large while other conditions are being equal. The conditions for the appearance of an anomalous positive tunneling magnetoresistance are formulated based on the study of composites with a mono-elemental ferromagnetic phase from cobalt.

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Thermal Stability of (Mg/NbO_x)₈₂ Multilayer Nanostructure

Stognei,

Smirnov,

Sitnikov

et al. 2024

Physica Status Solidi (a)

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Thermal stability of the multilayer (Mg/NbOx)82 nanostructure and the effect of heat treatment on its electrical properties and phase composition depending on the bilayer thickness are studied. The studied (Mg/NbOx)82 samples contain 82 bilayers whose thickness varies in the range from 2.2 to 6.2 nm. The NbOx layer thickness in the multilayers is the same (0.96 nm) in all samples, while the magnesium layers thickness is varied. It is established that the magnesium layers are either discrete (a set of nanosized particles) or continuous depending on their thickness. A metallothermic reaction occurs in (Mg/NbOx)82 multilayer nanostructures at a temperature of 430 °C: niobium oxide decomposes and the released oxygen partly oxidizes the magnesium layers. That leads to the conductive magnesium metal layers breaking and to the sharp increase of the nanostructures’ resistance by more than two orders. Despite the metallothermic reaction, the layering of the (Mg/NbOx)82 nanostructures as a whole and the presence of unoxidized magnesium inclusions remain even after heating up to 450 °C.

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Change of the electrical properties of granular CoFeB–SiOn nanocomposites after heat treatment

Cited by 12 publications

References 9 publications

Magnetotransport properties of Co_х(MgF₂)_100-x oxygen-free nanocomposites

Magnetotransport properties of Co_х(MgF₂)_100-x oxygen-free nanocomposites

Tunnel Magnetoresistive Effect in Nanostructured Composite Systems

Thermal Stability of (Mg/NbO_x)₈₂ Multilayer Nanostructure

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Change of the electrical properties of granular CoFeB–SiOn nanocomposites after heat treatment

Cited by 12 publications

References 9 publications

Magnetotransport properties of Coх(MgF2)100-x oxygen-free nanocomposites

Magnetotransport properties of Coх(MgF2)100-x oxygen-free nanocomposites

Tunnel Magnetoresistive Effect in Nanostructured Composite Systems

Thermal Stability of (Mg/NbOx)82 Multilayer Nanostructure

Contact Info

Product

Resources

About

Magnetotransport properties of Co_х(MgF₂)_100-x oxygen-free nanocomposites

Magnetotransport properties of Co_х(MgF₂)_100-x oxygen-free nanocomposites

Thermal Stability of (Mg/NbO_x)₈₂ Multilayer Nanostructure