Magnetization dynamics as derived from magneto impedance measurements

Carara, M.; Baibich, M.N.; Sommer, R.L.

doi:10.1063/1.373662

Cited by 42 publications

(20 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[35][36][37] Figure 10͑a͒ shows the temperature dependence of DW and S . Both DW and S increase with temperature up to 210 K, then decrease rapidly near 225 K. According to data in Fig.…”

Section: B Impedance and Magnetic Permeability Versus Frequencymentioning

confidence: 99%

Impedance and initial magnetic permeability of gadolinium

Fraga¹,

Pureur²,

Cardoso³

2010

Journal of Applied Physics

View full text Add to dashboard Cite

In the present work we report on measurements of the complex impedance and the magnetoimpedance of a textured sample of gadolinium metal. The preferential c -axis orientation of the Gd hexagonal structure is perpendicular to the long axis of the sample. From the experimental data, the complex initial magnetic permeability, = Ј+ i Љ, was obtained as a function of temperature and frequency of the ac exciting current. We have found that the results for Ј͑T͒ below the spin reorientation temperature may be described as a power law of the reduced temperature t =1−T / T SR , where T SR is the spin reorientation temperature. This behavior suggests that a genuine phase transition occurs at T SR . Although the impedance displays a weak anomaly at the Curie temperature, T C , magnetic measurements indicate that the ferromagnetic response of Gd extends up to this critical point. Thus, two different phases characterizes the cooperative magnetic state of this metal. The frequency dependent results for Ј and Љ were fitted to a modified Debye formula and the obtained parameters allow us to discriminate between the contributions from domain-wall motion and from magnetization rotation. We obtain that the dynamical properties of the domain walls in Gd are governed by a broad distribution of frequencies whose average value diverge at T SR . The isothermal magnetoimpedance measurements in temperatures smaller than T SR show an interesting plateau at low dc applied fields. This plateau is limited by a characteristic field H K whose magnitude decreases rapidly to nearly zero at T SR , giving further support for the phase transition scenario at this temperature.

show abstract

“…[35][36][37] Figure 10͑a͒ shows the temperature dependence of DW and S . Both DW and S increase with temperature up to 210 K, then decrease rapidly near 225 K. According to data in Fig.…”

Section: B Impedance and Magnetic Permeability Versus Frequencymentioning

confidence: 99%

Impedance and initial magnetic permeability of gadolinium

Fraga¹,

Pureur²,

Cardoso³

2010

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…One of the most widely used methods to get a comprehensive insight into the behaviour of magnetization mechanisms under the influence of AC magnetic field is the application of complex permeability formalism [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Magnetization dynamics of FeCuNbSiB soft magnetic ribbons and derived powder cores

Füzer

Dobák

Kollář

2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…Real and imaginary parts of the complex permeability were calculated from the measured inductance and serial resistance of the measuring circuit and parameters of the sample and toroidal coil [6,7]. Table I summarizes the parameters and properties of the prepared samples, volume fractions of the constituents and pores, outer diameter D, inner diameter d, height h, mass m, specific resistivity ρ, the coercivity H c , hysteresis lossesW DC at maximum induction 0.2 T and the demagnetization factor N d .…”

Section: Methodsmentioning

confidence: 99%

DC Magnetic Properties and Complex Permeability of Ni-Fe Based Composites

et al. 2017

View full text Add to dashboard Cite

We have investigated soft magnetic composite materials to better understand the influence of binder (resin) content on the DC magnetic properties and the complex permeability. Soft magnetic composite samples were composed from NiFe powder with phenol formaldehyde resin (ATM). Ferromagnetic magnetic powder for ring-shaped samples was obtained by milling of small pieces cut of NiFe sheets. The obtained powder was annealed to partially remove structural defects. The prepared powder was mixed with phenol-formaldehyde resin in different vol.%. The mixtures were pressed into the ring-shape samples. Complex permeability and DC magnetic properties (initial magnetization curves, anhysteretic curves and hysteresis loops) were measured. Higher inner demagnetizing fields in the resin containing samples were responsible for higher coercivity and hysteresis losses, but the permeability was stable up to much higher frequencies, compared to the sample without the resin.

show abstract

Magnetization dynamics as derived from magneto impedance measurements

Cited by 42 publications

References 17 publications

Impedance and initial magnetic permeability of gadolinium

Impedance and initial magnetic permeability of gadolinium

Magnetization dynamics of FeCuNbSiB soft magnetic ribbons and derived powder cores

DC Magnetic Properties and Complex Permeability of Ni-Fe Based Composites

Contact Info

Product

Resources

About