Measurement of linewidth of single crystal ferrites by monitoring the reflected wave in short-circuited transmission line

Bady, I.

doi:10.1109/tmag.1967.1066105

Cited by 17 publications

(2 citation statements)

References 4 publications

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“…The FMR field and half-power linewidth were measured by a standard shorted waveguide technique. 6 The measurement frequency was 50 GHz for the Ba-M disk and 8.8 GHz for the Zn-Y disk. The samples were mounted on the side of a TE 10 waveguide short, one-quarter wavelength from the short.…”

Section: A Experimentsmentioning

confidence: 99%

Angle dependence of the ferromagnetic resonance linewidth in easy-axis and easy-plane single crystal hexagonal ferrite disks

Hurben

Franklin

Patton

1997

Journal of Applied Physics

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Ferromagnetic resonance measurements were made as a function of the static external field angle for c-plane disks of single crystal flux grown manganese substituted barium M-type ͑Ba-M ͒ and zinc Y-type ͑Zn-Y ͒ hexagonal ferrites at 50 and 8.8 GHz, respectively. A shorted waveguide technique was used. Analysis of the FMR field versus angle results confirmed the operational assumption of a uniform mode response. For the easy-axis Ba-M disk, the linewidth was 69 Oe when the external field and magnetization vectors were perpendicular to the disk. The linewidth increased to a maximum measured value of 472 Oe when the magnetization was directed 45.4°from the sample normal. For the easy-plane Zn-Y disk, the linewidth had a minimum value of 18 Oe when the field and magnetization vectors were in-plane. The maximum linewidth was 391 Oe when the magnetization was directed 25.2°from the disk normal. The linewidths were larger than predicted for reasonable values of the Landau-Lifshitz damping and showed angle dependences which indicated nonintrinsic contributions to the loss. A modified two magnon scattering calculation based on the model of Sparks, Loudon, and Kittel was used to investigate these linewidth differences. The calculation included anisotropy modifications to the spin wave band for each material. The angle dependences of the excess linewidths show qualitative agreement with the two magnon predictions, with inhomogeneity sizes on the order of 1 and 0.25 m and volume fractions of 0.01 and 0.005 for the Ba-M and Zn-Y disks, respectively.

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Section: A Experimentsmentioning

confidence: 99%

Angle dependence of the ferromagnetic resonance linewidth in easy-axis and easy-plane single crystal hexagonal ferrite disks

Hurben

Franklin

Patton

1997

Journal of Applied Physics

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“…Among these methods, the one port method (reflection method) has been drawing much attention due to simple configuration and easy procedure. A number of the related papers had been already reported [1][2][3] [4]. There are two ways of using shorted coaxial line and shorted microstrip line for the one port method.…”

Section: Introductionmentioning

confidence: 99%

Permeability Measurement System up to 10 GHz Using All Shielded Shorted Microstrip Line

Takeda¹,

Motomura²,

Hotchi³

et al. 2014

J. Jpn. Soc. Powder Powder Metallurgy

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The wideband measurement system of permeability for magnetic thin slab was proposed for up to 10GHz, using the all shielded shorted microstrip lines. In order to analyze this configuration, the reference plane was set on the other end of specimen where the LC parallel resonant circuit was assumed. The permeability was derived from the measurement of S11 by VNA (Vector Network Analyzer) comparing between with strong static magnetic field parallel to rf magnetic field and without it. The shorted microstrip line was calibrated by the standard sample of rectangular shape NSS (Noise Suppression Sheet) comparing with the results of toroidal core measured by the shorted coaxial line.

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Experimental Techniques to Investigate Spin Dynamics

Barman

Sinha

2017

Spin Dynamics and Damping in Ferromagnetic Thin Films and Nanostructures

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Measurement of linewidth of single crystal ferrites by monitoring the reflected wave in short-circuited transmission line

Cited by 17 publications

References 4 publications

Angle dependence of the ferromagnetic resonance linewidth in easy-axis and easy-plane single crystal hexagonal ferrite disks

Angle dependence of the ferromagnetic resonance linewidth in easy-axis and easy-plane single crystal hexagonal ferrite disks

Permeability Measurement System up to 10 GHz Using All Shielded Shorted Microstrip Line

Experimental Techniques to Investigate Spin Dynamics

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