Electrical transport, magnetic properties of the half-metallic Fe3O4-based Schottky diode

Yan, Hong; Zhang, Ming; Yan, Hui

doi:10.1016/j.jmmm.2009.02.031

Cited by 19 publications

(3 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The photoelectron peaks at 711.3 and 724.2 eV were ascribable to Fe 2p3/2 and 2p1/2, respectively. The absence of satellite peaks at the 716–720 eV indicated that the mCNTs were Fe 3 O 4 ‐MWCNTs . In addition to the peaks for C, O and Fe, the peak at 400.7 eV for N 1s indicated that polydopamine was successfully coated on the surface of mCNTs.…”

Section: Resultsmentioning

confidence: 99%

Extraction of ochratoxin A in red wine with dopamine‐coated magnetic multi‐walled carbon nanotubes

Wan

Zhang

Bai

et al. 2017

J of Separation Science

View full text Add to dashboard Cite

A new, rapid, green, and cost-effective magnetic solid-phase extraction of ochratoxin A from red wine samples was developed using polydopamine-coated magnetic multi-walled carbon nanotubes as the absorbent. The polydopamine-coated magnetic multi-walled carbon nanotubes were fabricated with magnetic multi-walled carbon nanotubes and dopamine by an in situ oxidative self-polymerization approach. Transmission electron microscopy, dynamic light scattering, X-ray photoelectron spectroscopy and vibrating sample magnetometry were used to characterize the absorbents. Ochratoxin A was quantified with high-performance liquid chromatography coupled with fluorescence detection, with excitation and emission wavelengths of 338 and 455 nm, respectively. The conditions affecting the magnetic solid-phase extraction procedure, such as pH, extraction solution, extraction time, absorbent amount, desorption solution and desorption time were investigated to obtain the optimal extraction conditions. Under the optimized conditions, the extraction recovery was 91.8-104.5% for ochratoxin A. A linear calibration curve was obtained in the range of 0.1-2.0 ng/mL. The limit of detection was 0.07 ng/mL, and the limit of quantitation was 0.21 ng/mL. The recoveries of ochratoxin A for spiked red wine sample ranged from 95.65 to 100.65% with relative standard deviation less than 8%. The polydopamine-coated magnetic multi-walled carbon nanotubes showed a high affinity toward ochratoxin A, allowing selective extraction and quantification of ochratoxin A from complex sample matrixes.

show abstract

Section: Resultsmentioning

confidence: 99%

Extraction of ochratoxin A in red wine with dopamine‐coated magnetic multi‐walled carbon nanotubes

Wan

Zhang

Bai

et al. 2017

J of Separation Science

View full text Add to dashboard Cite

show abstract

“…Maghemite (

-Fe

) is ferrimagnet with magnetite-like inverse spinel structure and hematite-like stoichiometry, for which the charge neutrality is achieved through the presence of Fe ions vacancies [ 25 ]. Hematite [ 26 ] and magnetite [ 27 ] have both demonstrated their applicability in oxide-based junctions with the Schottky barrier.…”

Section: Introductionmentioning

confidence: 99%

Electrical Transport and Magnetic Properties of Metal/Metal Oxide/Metal Junctions Based on Anodized Metal Oxides

et al. 2021

View full text Add to dashboard Cite

In this paper, we describe magnetoelectric properties of metal/metal-oxide/metal junctions based on anodized metal oxides. Specifically, we use Ti and Fe metallic layers separated by the porous metal-oxides of iron or titanium formed by the anodization method. Thus, we prepare double junctions with at least one ferromagnetic layer and measure magnetoresistance, as well as their current-voltage and magnetic characteristics. We find that magnetoresistance depends on that junction composition and discuss the nature of differential resistance calculated from I-V characteristics. Our findings show that a top metallic layer and the interface between this layer and anodized oxide, where strong interatomic diffusion is expected, have the strongest influence on this observed behavior.

show abstract

“…In turn, maghemite (γ−Fe 2 O 3 ) is ferrimagnet with magnetite-like inverse spinel structure and hematite-like stoichiometry, for which the charge neutrality is obtained because of the presence of Fe ions vacancies [25]. The hematite ( [26]) and magnetite ( [27]) have demonstrated their applicability in oxide-based junctions with the Schottky barrier.…”

Section: Introductionmentioning

confidence: 99%

Electrical Transport and Magnetic Properties of Metal/Metal Oxide/Metal Junctions Based on Anodized Metal Oxides

Zarzycki

Chojenka

Perzanowski

et al. 2021

Preprint

View full text Add to dashboard Cite

In this paper we present magnetoelectric properties of metal/metal-oxide/metal junctions. We use Ti and Fe as metallic layers separated by the porous metal-oxides of iron or titanium formed with the anodization method. This allowed to prepare double junctions with at least one ferromagnetic layer. Here we show magnetoresistance and current-voltage characteristics of the junctions together with their magnetic characteristics. We found positive or negative magnetoresistance depending on junction composition. We discuss also the nature of differential resistance calculated from I-V characteristics. Our findings show that the strongest influence on observed behaviour has a top metallic layer and the interface between this layer and anodized oxide where strong interatomic diffusion is expected.

show abstract

Electrical transport, magnetic properties of the half-metallic Fe3O4-based Schottky diode

Cited by 19 publications

References 21 publications

Extraction of ochratoxin A in red wine with dopamine‐coated magnetic multi‐walled carbon nanotubes

Extraction of ochratoxin A in red wine with dopamine‐coated magnetic multi‐walled carbon nanotubes

Electrical Transport and Magnetic Properties of Metal/Metal Oxide/Metal Junctions Based on Anodized Metal Oxides

Electrical Transport and Magnetic Properties of Metal/Metal Oxide/Metal Junctions Based on Anodized Metal Oxides

Contact Info

Product

Resources

About