Low Temperature Magnetic Properties of Nanocrystalline Co-Nb-Cu-Si-B Alloys

Ślawska‐Waniewska, A.

doi:10.1007/1-4020-2965-9_11

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…The ZFC/FC curves of the FeCo nanoparticle film, however, overlap well within the whole temperature range (Figure a). No observation of split indicates that ferromagnetic ordering is predominant in the as-deposited film . For noninteracting, randomly oriented magnetic nanoparticle, when its diameter is below superparamagnetic blocking limit ( d b ), thermal fluctuation is equivalent to the energy barrier of magnetization flips, that is, magnetic anisotropy .…”

Section: Resultsmentioning

confidence: 99%

“…No observation of split indicates that ferromagnetic ordering is predominant in the as-deposited film. 34 For noninteracting, randomly oriented magnetic nanoparticle, when its diameter is below superparamagnetic blocking limit (d b ), thermal fluctuation is equivalent to the energy barrier of magnetization flips, that is, magnetic anisotropy. 22 Consequently, the magnetic nanoparticle assembly will be superparamagnetic without any hysteresis.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Ultrafine FeCo Nanoparticles Isolated by Ultrathin Dielectric Shells for Microwave Application

Bai

Jin

Yan

2019

ACS Appl. Nano Mater.

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Low-dimensional soft magnetic materials are technologically important for miniaturization of magnetic devices. It is, however, challenging to maintain ferromagnetic response in nanosized magnetic material. In this work, ultrafine FeCo nanoparticles have been prepared by reactive pulsed laser deposition, which can be exchange coupled through ultrathin dielectric shells, even though their diameters are far below the superparamagnetic blocking limit. This unique core/shell structure guarantees ferromagnetic coupling and insulation of neighboring magnetic nanoparticles simultaneously. The nanoparticle film exhibits large saturation magnetization of 1.13 T, high electrical resistivity of 4200 μΩ·cm, maximum permeability of 120, a cutoff frequency of 1.7 GHz, and it is a promising material for microwave application.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Ultrafine FeCo Nanoparticles Isolated by Ultrathin Dielectric Shells for Microwave Application

Bai

Jin

Yan

2019

ACS Appl. Nano Mater.

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Microstructure and electromagnetic performance of the FeCoAlON films tuned by N2 pressure during reactive pulsed laser deposition

Bai

Yan

2018

Journal of Alloys and Compounds

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Coercivity and its thermal dependence in microsized magnetic particles: Influence of grain boundaries

Marı́n¹,

Aragón²,

Lieblich

et al. 2013

Journal of Applied Physics

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Fe73.5Si13.5B9Nb3Cu1 powder particles have been obtained by gas atomization. Magnetization curves and coercivity were studied for particles ranging in size up to 1000 μm. The overall magnetic behavior of such material is a consequence of compositional heterogeneity of the microstructure as a whole. Anomalous temperature variation of coercivity (Hc) (i.e., a decrease in Hc with decreasing temperature) together with a decrease of saturation magnetization has been observed for less than 25 μm size. The origin of this behavior has been ascribed to metastable FeCu and FeNbSi phases in combination with an Fe-rich one. Making magnetic powders with coercive fields of the order of mOe remains a challenge for researchers. Our experiment has allowed us, at low temperature, achieving a coercive field of 9 Oe, much lower than those observed so far in this type of materials. This behaviour has been related with a FeCu phase present on grain boundaries.

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Low Temperature Magnetic Properties of Nanocrystalline Co-Nb-Cu-Si-B Alloys

Cited by 3 publications

References 23 publications

Ultrafine FeCo Nanoparticles Isolated by Ultrathin Dielectric Shells for Microwave Application

Ultrafine FeCo Nanoparticles Isolated by Ultrathin Dielectric Shells for Microwave Application

Microstructure and electromagnetic performance of the FeCoAlON films tuned by N2 pressure during reactive pulsed laser deposition

Coercivity and its thermal dependence in microsized magnetic particles: Influence of grain boundaries

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