Measurement of magnetic properties of single crystal YIG by non-resonant method

Bose, D. N.; Borgaonkar, Sushama; Vedavathy, T.S.

doi:10.1007/bf02908575

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…The obtained periodic structures exhibited the saturation magnetization as 1.37 emu/cm 3 , remnant magnetization as 0.08 emu/cm 3 , and the coercivity force as 66 Oe. The selective‐growth crystal iron‐garnet film has smaller magnetization than single crystal 10 and the magnetic properties are very sensitive to surface roughness of the substrate induced by ion‐milling.…”

Section: Resultsmentioning

confidence: 99%

Selective‐area growth of periodic iron‐garnet thin films

Zhang

Han

2010

Physica Status Solidi (a)

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A new approach for the fabrication of periodic crystalline iron‐garnet thin films is introduced. Crystalline iron‐garnet planar triangular‐disposed thin film arrays are fabricated on SGGG substrate based on a selective‐area growth process, consisting of electron‐beam lithography patterning, soft ion‐milling, selective‐epitaxy, and chemical etching. Aluminum thin film is utilized in the processing, acting as a conductive layer to overcome any charge build‐up problem for the dielectric substrate. X‐ray diffraction results confirm that a crystalline iron‐garnet film can be deposited on a soft ion‐bombarded (GdCa)3(GaMgZr)5O12 (SGGG) surface by radio frequency (RF) plasma double ion‐beam sputtering. Planar periodic triangular‐disposed films are observed from field emission scanning electron microscope and atom force microscope, with diameters of 200–300 nm, a height of 30 nm, and a spacing interval of 350 nm. A typical hysteresis loop of magnetic materials is obtained. All results show this structure has great potential to be used as two‐dimensional magnetic photonic crystals (2D‐MPCs) and the selectively growth method can also be used to fabricate other 2D‐MPCs.

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Section: Resultsmentioning

confidence: 99%

Selective‐area growth of periodic iron‐garnet thin films

Zhang

Han

2010

Physica Status Solidi (a)

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Electrodynamic improvements to the theory of magnetostatic modes in ferrimagnetic spheres and their applications to saturation magnetization measurements

Křupka

Pacewicz

Salski

et al. 2019

Journal of Magnetism and Magnetic Materials

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Electrodynamic theory applied to the analysis of TE n0p mode resonances in ferromagnetic spheres placed either in metallic cavities or in the free space is compared with Walker-Fletcher's theory of so-called magnetostatic modes. The influence of the diameter of the sample, its permittivity and the permittivity of the surrounding media on the resonance frequencies of a few modes is analyzed. It is shown that the dominant resonances are essentially related either to negative values of the diagonal component of the permeability tensor or, for clockwise circularly polarized magnetic fields, to negative effective permeability. The electrodynamic theory is used to determine the saturation magnetization (Ms) from measured TE n01 frequency differences.Measurements on different samples confirmed that Ms can be determined using an electrodynamic approach with uncertainties of the order of 2% regardless of sample sizes, metal enclosures or static magnetic field values.

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Electrodynamic theory of ferromagnetic resonance and its applications in precise measurements of ferromagnetic linewidth, permeability tensor and saturation magnetization

et al. 2020

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This review paper describes the state of the art in measurements of ferromagnetic linewidth, permeability tensor and saturation magnetization employing electrodynamic theory of ferromagnetic resonance. It is shown that the electrodynamic theory allows significant improvements of measurement accuracy of these parameters with respect to the commonly used perturbation and magnetostatics theories. Contrary to the perturbation method the electrodynamic theory is not limited to small samples. It allows determination of the resonance frequencies and Q-factors for arbitrary size spherical and cylindrical gyromagnetic samples in suitably chosen metal enclosures. Results obtained with the electrodynamic theory for very small samples are identical to those obtained with perturbation and magnetostatics theories. Results of measurements of the ferromagnetic linewidth, permeability tensor and saturation magnetization at microwave frequencies are presented.

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Measurement of magnetic properties of single crystal YIG by non-resonant method

Cited by 4 publications

References 10 publications

Selective‐area growth of periodic iron‐garnet thin films

Selective‐area growth of periodic iron‐garnet thin films

Electrodynamic improvements to the theory of magnetostatic modes in ferrimagnetic spheres and their applications to saturation magnetization measurements

Electrodynamic theory of ferromagnetic resonance and its applications in precise measurements of ferromagnetic linewidth, permeability tensor and saturation magnetization

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