Spin-reorientation transition in ɛ-In0.24Fe1.76O3 nanowires

Dmitriev, A. I.; Коплак, О. В.; Namai, Asuka; Tokoro, Hiroko; Ohkoshi, Shin‐ichi; Моргунов, Р. Б.

doi:10.1134/s1063783414090091

Cited by 12 publications

(12 citation statements)

References 20 publications

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“…7). Positions of the S(H) and χ irr (H) maxima are close to coercive field H c = 6 kOe determined from the hysteresis loop [8,9] (Fig. 6).…”

Section: Fluctuation Field and Activation Volumesupporting

confidence: 57%

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Spontaneous magnetization reversal caused by magnetic noise in ε-In_0.24Fe_1.76O₃ nanoparticles

Dmitriev

2018

EPJ Web Conf.

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Kinetics of magnetization relaxation of the exotic ε-In0.24Fe1.76O3 nanoparticles under applied magnetic field has been studied. The fluctuation field and the activation volume have been calculated from the magnetic viscosity data. The relation between magnetic viscosity and magnetic noise caused by the random thermally activated magnetization reversal of a single nanoparticle has been established. Stepped sweeping of magnetic field expands the windows of experimentally detectable magnetic fluctuations. The changes in the reversal magnetic field provide ε-In0.24Fe1.76O3 nanoparticles scanning and sorting them by magnetic noise frequency.

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“…7). Positions of the S(H) and χ irr (H) maxima are close to coercive field H c = 6 kOe determined from the hysteresis loop [8,9] (Fig. 6).…”

Section: Fluctuation Field and Activation Volumesupporting

confidence: 57%

“…where N = 2π is the demagnetizing factor of cylinder and χ = dM/dH is the slope of tangent to demagnetizing curve of magnetic hysteresis loop [8,9] (Fig. 6).…”

Section: Fluctuation Field and Activation Volumementioning

confidence: 99%

Spontaneous magnetization reversal caused by magnetic noise in ε-In_0.24Fe_1.76O₃ nanoparticles

Dmitriev

2018

EPJ Web Conf.

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“…For easier comparison the temperature independent soft magnetic component contribution has been subtracted. The value of the low temperature M s is mostly the same for different thickness and is slightly above 100 emu/cm 3 being a reasonable value for ε-Fe 2 O 3 [7,23,24]. A drastic decrease of saturation magnetization M s with temperature was observed in all the films.…”

Section: Magnetization Reversal In ε-Fe 2 O 3 Films Of Different Thicmentioning

confidence: 54%

Correlation between crystal structure and magnetism in PLD grown epitaxial films of ε-Fe₂O₃ on GaN

Korovin

Ситникова

Kirilenko

et al. 2021

Science and Technology of Advanced Materials

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In the present paper we discuss correlations between crystal structure and magnetic properties of epitaxial ε-Fe 2 O 3 films grown on GaN. The large magnetocrystalline anisotropy and room temperature multiferroic properties of this exotic iron oxide polymorph, make it a perspective material for the development of low power consumption magnetic media storage devices. Extending our recent progress in PLD growth of ε-Fe 2 O 3 on the surface of technologically important nitride semiconductors, we apply reciprocal space tomography by electron and x-ray diffraction to investigate the break of crystallographic symmetry occurring at the oxide-nitride interface resulting in the appearance of anisotropic crystallographic disorder in the sub-100 nm ε-Fe 2 O 3 films. The orthorhombic-on-hexagonal nucleation scenario is shown responsible for the development of a peculiar columnar structure observed in ε-Fe 2 O 3 by means of HRTEM and AFM. The complementary information on the direct and reciprocal space structure of the columnar ε-Fe 2 O 3 films is obtained by various techniques and correlated to their magnetic properties. The peculiar temperature dependence of magnetization studied by the small-field magnetization derivative method and by neutron diffraction reveals the existence of a magnetic softening below 150 K, similar to the one observed earlier solely in nanoparticles. The magnetization reversal in ε-Fe 2 O 3 films probed by X-ray magnetic circular dichroism is found different from the behavior of the bulk averaged magnetization measured by conventional magnetometry. The presented results fill the gap between the numerous studies performed on randomly oriented ε-Fe 2 O 3 nanoparticles and much less frequent investigations of epitaxial epsilon ferrite films with lattice orientation fixed by the substrate.

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“…Various authors attribute it to collinear ferrimagnet or a canted antiferromagnets. Besides, magnetic properties and resonance behavior of ε-Fe 2 O 3 were shown to be modified upon partial Fe substitution by Al [11], Ga [12], or In [13][14][15]. Gd being the magnetic ion can effect in the ε-Fe 2 O 3 magnetic properties even in higher extent.…”

Section: Esrmentioning

confidence: 99%

Microwave and magneto-optic properties of ε-Fe₂O₃ nanoparticles arising in borate glasses doped with Fe and Gd

et al. 2018

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The ε-Fe2O3 nanoparticles in borate glasses co-doped with low concentrations of Fe2O3 and Gd2O3 were investigated with two experimental techniques – visible magnetic circular dichroism (MCD) and electron spin resonance (ESR). The most prominent features of the MCD spectra are: non-linear dependence of the spectral maxima intensities on the Gd concentration and strong increase with the temperature decrease. The ESR spectra of these glasses exhibit two features with g = 4.3 due to the diluted Fe3+ ions and 2.0 associated both with Fe3+ ions and with nanoparticles. The integrated spectra intensities do not follow the T-1 Curie law suggesting a considerable contribution from the magnetically ordered nanoparticles to ESR. Analysis of the MCD and ESR concentration dependences allow suggestion on the Gd ions incorporation into nanoparticles.

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Spin-reorientation transition in ɛ-In0.24Fe1.76O3 nanowires

Cited by 12 publications

References 20 publications

Spontaneous magnetization reversal caused by magnetic noise in ε-In_0.24Fe_1.76O₃ nanoparticles

Spontaneous magnetization reversal caused by magnetic noise in ε-In_0.24Fe_1.76O₃ nanoparticles

Correlation between crystal structure and magnetism in PLD grown epitaxial films of ε-Fe₂O₃ on GaN

Microwave and magneto-optic properties of ε-Fe₂O₃ nanoparticles arising in borate glasses doped with Fe and Gd

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Spin-reorientation transition in ɛ-In0.24Fe1.76O3 nanowires

Cited by 12 publications

References 20 publications

Spontaneous magnetization reversal caused by magnetic noise in ε-In0.24Fe1.76O3 nanoparticles

Spontaneous magnetization reversal caused by magnetic noise in ε-In0.24Fe1.76O3 nanoparticles

Correlation between crystal structure and magnetism in PLD grown epitaxial films of ε-Fe2O3 on GaN

Microwave and magneto-optic properties of ε-Fe2O3 nanoparticles arising in borate glasses doped with Fe and Gd

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Product

Resources

About

Spontaneous magnetization reversal caused by magnetic noise in ε-In_0.24Fe_1.76O₃ nanoparticles

Spontaneous magnetization reversal caused by magnetic noise in ε-In_0.24Fe_1.76O₃ nanoparticles

Correlation between crystal structure and magnetism in PLD grown epitaxial films of ε-Fe₂O₃ on GaN

Microwave and magneto-optic properties of ε-Fe₂O₃ nanoparticles arising in borate glasses doped with Fe and Gd