Permeability spectra of yttrium iron garnet and its granular composite materials under dc magnetic field

Abstract

Hard magnetic properties of Mn-Ga melt-spun ribbons J. Appl. Phys. 112, 083901 (2012) Influence of chemical pressure in Sn-substituted Ni2MnGa Heusler alloy: Experimental and theoretical studies J. Appl. Phys. 112, 073921 (2012) Hysteresis effects in the inverse magnetocaloric effect in martensitic Ni-Mn-In and Ni-Mn-Sn J. Appl. Phys. 112, 073914 (2012) Magnetic and electronic properties of Fe and Ni codoped SnO2

The tunable negative permittivity and negative permeability of percolative Fe/Al2O3 composites in radio frequency range

“…Further, the permeability dispersion would be adjusted by the external magnetic field. 26,33 Double negative property of sample FA30 is shown in Fig. 4(b).…”

Permeability and permittivity spectra of substituted barium Ferrites BaFe12−x(Ti0.5Co0.5)xO19(x=0 to 5)

“…To evaluate the mechanism of permeability dispersion in BaFe 12 À x (Ti 0.5 Co 0.5 ) x O 19 , complex permeability spectra was measured under the external magnetic field along the parallel direction to the TEM wave propagating axis in the coaxial line by an experimental setup using the extended transmission line and an electromagnet [31][32][33]. The 7/3-mm coaxial sample cell was inserted between the pole pieces of the electromagnet; transmission/reflection measurements were carried out using S-parameters S 11 and S 21 .…”

Towards electromagnetic metamaterial: Negative permeability spectra of YIG composite materials

“…We have studied the negative permeability spectra of sintered YIG under external magnetic field; the contributions of domain wall and gyromagnetic spin resonance to the frequency dispersions of permeability were evaluated by the numerical calculation using frequency dispersion formulae [10]. Further, it was elucidated that the YIG granular composite materials also show negative permeability spectra in the microwave range under external magnetic field [10].…”

“…To obtain the MNG material, negative permeability spectra of ferrites or ferromagnetic granular composite materials have been investigated [8][9][10][11][12][13]. We have studied the negative permeability spectra of sintered YIG under external magnetic field; the contributions of domain wall and gyromagnetic spin resonance to the frequency dispersions of permeability were evaluated by the numerical calculation using frequency dispersion formulae [10].…”

“…The detailed characteristics of YIG particles and the preparation of composite materials are described in Ref. 10. Toroidal samples (inner diameter: 3 mm, outer diameter: 7 mm) having the thickness of about 1 mm were prepared to avoid the dimensional resonance in the permeability measurement.…”