Thickness and temperature dependence of subsidiary absorption thresholds in yttrium-iron-garnet thin films

A. V. Pomyalov; I. Laulicht; J. Barak

doi:10.1016/0378-4371(93)90525-9

Thickness and temperature dependence of subsidiary absorption thresholds in yttrium-iron-garnet thin films

A. V. Pomyalov, I. Laulicht, J. Barak

Department of Physics - at Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

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Abstract

The microwave subsidiary absorption threshold in tangentially magnetized yttrium-iron-garnet (YIG) films was measured as a function of the static magnetic field, film thickness and decrease in the 0.3-3 μm range is observed. The effect is explained quantitatively by using modified Damon-Eshbach dispersion relations which take into account exchange interactions. The effect of temperature on h_crit, the smallest threshold field amplitude, in the 250<T< 450 K temperature range can be expressed by an empirical relationship h_crit αM_s(T)^-1.6 where M_s is the saturation magnetization. This h_crit vs M_s relationship is similar to that obtained for the magnetization dependence of parallel pump thresholds in Li-Ti ferrite compounds.

Original language	English
Pages (from-to)	267-277
Number of pages	11
Journal	Physica A: Statistical Mechanics and its Applications
Volume	200
Issue number	1-4
DOIs	https://doi.org/10.1016/0378-4371(93)90525-9
State	Published - 15 Nov 1993

Bibliographical note

Funding Information:
We are gratefult o S. Shatzf or computerc alculationsa nd helpful discussions. One of the authors (A.P.) would like to thank the Israeli Ministry of Absorption for partial support of the present research.

Funding

We are gratefult o S. Shatzf or computerc alculationsa nd helpful discussions. One of the authors (A.P.) would like to thank the Israeli Ministry of Absorption for partial support of the present research.

Funders	Funder number
Ministry of Aliyah and Immigrant Absorption

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abstract = "The microwave subsidiary absorption threshold in tangentially magnetized yttrium-iron-garnet (YIG) films was measured as a function of the static magnetic field, film thickness and decrease in the 0.3-3 μm range is observed. The effect is explained quantitatively by using modified Damon-Eshbach dispersion relations which take into account exchange interactions. The effect of temperature on hcrit, the smallest threshold field amplitude, in the 250crit αMs(T)-1.6 where Ms is the saturation magnetization. This hcrit vs Ms relationship is similar to that obtained for the magnetization dependence of parallel pump thresholds in Li-Ti ferrite compounds.",

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AU - Barak, J.

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AB - The microwave subsidiary absorption threshold in tangentially magnetized yttrium-iron-garnet (YIG) films was measured as a function of the static magnetic field, film thickness and decrease in the 0.3-3 μm range is observed. The effect is explained quantitatively by using modified Damon-Eshbach dispersion relations which take into account exchange interactions. The effect of temperature on hcrit, the smallest threshold field amplitude, in the 250crit αMs(T)-1.6 where Ms is the saturation magnetization. This hcrit vs Ms relationship is similar to that obtained for the magnetization dependence of parallel pump thresholds in Li-Ti ferrite compounds.

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Thickness and temperature dependence of subsidiary absorption thresholds in yttrium-iron-garnet thin films

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