Initial susceptibility of interacting fine particles

Chantrell, R.W.; Walmsley, N.S.; Gore, J.G.; Maylin, M.G.

doi:10.1016/s0304-8853(98)00683-0

Cited by 23 publications

(11 citation statements)

References 4 publications

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“…6(b). Previously [23], it was reported that the particle interaction can reduce the initial magnetic susceptibility. We find that the initial magnetic susceptibility of the three samples measured at 77 K increases compared to that measured at room temperature.…”

Section: Resultsmentioning

confidence: 99%

Cation distribution dependence of magnetic properties of sol–gel prepared MnFe2O4 spinel ferrite nanoparticles

Yuan

et al. 2010

Journal of Magnetism and Magnetic Materials

166

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Section: Resultsmentioning

confidence: 99%

Cation distribution dependence of magnetic properties of sol–gel prepared MnFe2O4 spinel ferrite nanoparticles

Yuan

et al. 2010

Journal of Magnetism and Magnetic Materials

166

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“…There are several reports that dipolar interactions between NPs can give rise to such a peak in FC magnetization. [21][22][23] Also for certain of the canonical spin glasses, it is reported that a small peak develops with field cooling at T f ͑freezing temperature͒, 24 followed by a plateau below it. However, it requires further investigation and analyzed in the following discussion.…”

Section: Magnetization Isothermsmentioning

confidence: 99%

Effect of polymer coating on the magnetic properties of oxygen-stabilized nickel nanoparticles

et al. 2010

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A comparative study of the structural and magnetic properties of polymer coated ͑pc-͒ and uncoated ͑uc-͒Ni nanoparticles prepared by chemical reduction method are reported. pc-Ni nanoparticles have been synthesized by reducing Ni 2+ cations to Ni particles by sodium borohydride in aqueous solution in the presence of polyvinyl alcohol ͑PVA͒ solution. Both samples have been identified to have a tetragonal crystal structure, different from its usual fcc structure, though some traces of fcc-Ni phase have been observed in x-ray diffraction and selected area electron diffractogram patterns for pc-Ni. This structural modification of fcc-Ni occurs due to the presence of interstitial oxygen atoms in the Ni lattice and results in appreciably modified magnetic properties in this new phase of Ni, as, for example, a nonhysteretic magnetization response with applied field at 300 K. A comparative magnetic study of the uc-and pc-Ni particles exemplifies the role played by the PVA matrix in modifying the magnetic properties of the uc-Ni sample. The M-H and M-T curves have been analyzed using superparamagnetic/ferromagnetic/paramagnetic component models and anomalies observed were explained using two-phase model.

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“…Thus, due to the non-balance phenomena featured by irreversibility and hysteresis, in the nanoparticle systems appear magnetic memory effects, which are very important for applications in magnetic memory devices. In major speciality works [4][5][6][7], these effects are assigned to the appearance of the spine collective states featured by complex phenomena of spine-glass type. In this context the concept of blocking temperature T B [4][5][6][7], as a temperature when the system is passing to the spine-glass state, was introduced.…”

Section: Introductionmentioning

confidence: 99%

Relaxation Times in Magnetic Nanoparticles System and Memory Effects

2007

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Some memory effects in nanoparticle systems, similar to those seen in spin glass systems, may have important device applications, by tuning the interaction and the particle size. Recently, this subject provoked a special interest in nano-sciences. In this work we present a study, by simulation of the mode in which the behavior of a magnetic nanoparticle system is influenced by the superposition of the dimensions' distribution, the effective anisotropy constants and the disposal of nanoparticles in the sample, if we take into account the dipolar magnetic interaction.

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Initial susceptibility of interacting fine particles

Cited by 23 publications

References 4 publications

Cation distribution dependence of magnetic properties of sol–gel prepared MnFe2O4 spinel ferrite nanoparticles

Cation distribution dependence of magnetic properties of sol–gel prepared MnFe2O4 spinel ferrite nanoparticles

Effect of polymer coating on the magnetic properties of oxygen-stabilized nickel nanoparticles

Relaxation Times in Magnetic Nanoparticles System and Memory Effects

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