High perpendicular anisotropy in copper ferrite thin films

Ahmad, M.; Desai, M.N.; Khatirkar, Rajesh K.

doi:10.1063/1.2826752

Cited by 8 publications

(5 citation statements)

References 20 publications

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“…7 These applications demand the preparation of high-quality ferrite films which so far have been deposited following different methods such as pulsed laser deposition (epitaxial iron oxide films on MgO substrates), 8 9 spin-coating, 3 radiofrequency sputtering, 10 and screen printing of ferrite powder on alumina substrate. 11 With the current trend toward miniaturization of magnetic systems, superparamagnetic iron oxide (SPIO)-based materials have gained increasing attention, especially for their potential use as components in the bottom-up approach for building nanosized magnetic materials.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Nanocomposites Fabricated via the Layer-by-Layer Approach

Paterno

Soler²,

Fonseca³

et al. 2010

J. Nanosci. Nanotech.

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In this study we describe the fabrication and characterization of nanocomposites consisting of layer-by-layer assembled polyaniline, sulfonated polystyrene, and maghemite nanoparticle layers. In order to assemble the starting components via electrostatic interaction, stable magnetic fluid containing maghemite nanoparticles (d approximately = 7 nm) with either positive or negative surface charges was used as source of nanoparticles for the layer-by-layer assembly. The structure, morphology, electrical and magnetic properties of such nanocomposite films were investigated by UV-Vis spectroscopy, atomic force microscopy, electrical, and magnetic measurements. The amount of PANI, PSS and maghemite nanoparticles within the nanocomposite films increased almost linearly with the number of deposited layers. Atomic force microscopy image of typical polyaniline/maghemite nanocomposites reveal nanoparticles adsorbed all over the film surface. The as-produced nanocomposite exhibits electrical conductivity and superparamagnetism behavior at room temperature, the latter confirmed by the absence of magnetic hysteresis.

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Section: Introductionmentioning

confidence: 99%

Magnetic Nanocomposites Fabricated via the Layer-by-Layer Approach

Paterno

Soler²,

Fonseca³

et al. 2010

J. Nanosci. Nanotech.

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“…The coercivity of studied samples was discussed in detail elsewhere. 3,10 The optical transmission spectra of studied samples are shown in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

“…The quenched samples with cubic structure show strong (111) preferred orientation. 5,10 The as-deposited samples had very low magnetic moment because of large grain boundary volume. Magnetic moment increases with annealing temperature due to improving crystallinity of the films and increasing volume of the ferrite phase.…”

Section: Methodsmentioning

confidence: 99%

Magneto-optical properties of nano-crystalline cubic and tetragonal copper ferrite thin films

Kučera

Brom

2015

Journal of Applied Physics

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Copper ferrite, CuFe2O4, films can be stabilized in cubic or tetragonal phases depending on the deposition conditions and post-deposition heat treatment. The difference is explained by redistribution of cations over particular crystal sites and Jahn-Teller distortion of the spinel lattice. Comparative magneto-optical study of the copper ferrite thin films with cubic and tetragonal symmetry is presented. It is shown that the Faraday rotation and magnetic circular dichroism spectra represent a sensitive tool for examination of cation distribution of magnetic Cu2+ and Fe3+ ions in tetrahedral and octahedral crystal sites of the spinel lattice.

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“…In recent years, ferrite thin films with spinel structure are being considered for more advanced applications such as future high-frequency applications [1,2], magneto-optical applications [3,4], and spintronics applications [5,6]. Heteroepitaxial growth is important to reduce attenuation of microwaves, light, and electric current attributable to scattering at the grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties of Epitaxial NiFe<sub>2</sub>O<sub>4</sub> Thin Films Prepared Using Dynamic Aurora PLD in a Magnetic Field

Kubo

Sakamoto

Shinozaki

et al. 2011

KEM

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This study examined effects of applying a magnetic field (up to 2 kG) on the magnetic properties of epitaxial NiFe2O4(NF) thin films during deposition. The NF films were deposited on Y0.15Zr0.85O1.93 (YSZ) buffered Si (001) substrates using pulsed laser deposition (PLD). Although application of magnetic field during deposition affected neither the crystal structure nor orientation of the NF thin films, it improved magnetic properties. The saturation magnetization (Ms) of NF thin films deposited at 500°C and 600°C without application of a magnetic field was as low as 40 emu/g. However, that of NF deposited under magnetic field of 2 kG got to bulk Ms (50.3 emu/g). The TEM observation results revealed that the anti-phase boundary (APB) density decreased by application of the magnetic field during deposition. Results show that magnetic properties of NF thin films are controllable using the magnetic field during deposition.

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High perpendicular anisotropy in copper ferrite thin films

Cited by 8 publications

References 20 publications

Magnetic Nanocomposites Fabricated via the Layer-by-Layer Approach

Magnetic Nanocomposites Fabricated via the Layer-by-Layer Approach

Magneto-optical properties of nano-crystalline cubic and tetragonal copper ferrite thin films

Magnetic Properties of Epitaxial NiFe<sub>2</sub>O<sub>4</sub> Thin Films Prepared Using Dynamic Aurora PLD in a Magnetic Field

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