Technique under compressive stress for determining the magneto-elastic effects in ferrites

Gallou, J.-H. Le; Ledieu, M.; Grimal, Virginie; Acher, O.

doi:10.1016/j.jmmm.2008.02.041

Cited by 2 publications

(1 citation statement)

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“…1.A-C). From the measured transmission and reflection coefficients of a cell containing the nanoparticles, the μeff and εeff spectra were retrieved using the Nicolson-Ross algorithm [Le Gallou 2008]. Two vectorial network analyzers were used: a PNA N5232A from 1 MHz to 6 GHz and a PNA N5230A from 10 MHz to 20 GHz (both from Agilent Technologies) to cover a wide range of frequencies.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Evidence of the Superparamagnetic State in the Zero-Field Microwave Susceptibility Spectra of Ferrimagnetic Nanoparticles

et al. 2020

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Static and dynamic magnetic properties of Zn0.4Fe2.6O4 nanoparticles synthesized by thermal decomposition have been investigated. Two ranges of diameter have been used: small particles (diameter about 6.2 nm) and larger ones (diameter about 22.4 nm). The nanoparticle microstructure has been characterized by transmission electron microscopy. The temperature dependence of the zero-field dynamic permeability for both nanoparticle sizes has been studied, revealing a superparamagnetic state for the small ones. Effects of the nanoparticle size on the dynamic permeability have been studied, and linked to the superparamagnetic state. A dynamic susceptibility model has been found to reproduce the experimental behavior as well as its temperature dependence.

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Section: Experimental Techniquesmentioning

confidence: 99%