Initial Permeability Characteristics of Mixed Yttrium-Gadolinium Iron Garnets
- 1 May 1960
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 31 (5), S47-S48
- https://doi.org/10.1063/1.1984599
Abstract
Complex initial permeability measurements have been made on polycrystalline garnet toroids of the form where ranged from zero (yttrium iron garnet) to three (gadolinium iron garnet). Both the real initial permeability and the imaginary initial permeability were measured at 23°C, −78°C and −196°C over a frequency range of 1 kc to 2000 Mc. At room temperature, the low frequency value of was found to decrease with increasing gadolinium content. At lower temperatures the low frequency value of exhibits a minimum in caused by the temperature dependent behavior of the two different magnetic sublattices. The frequency at which the maximum value of occurs was found to increase with the addition of gadolinium. No thermal relaxation was observed in these garnets, but rather the peaks in the curves shifted to slightly higher frequencies with decreasing temperature.
Keywords
This publication has 4 references indexed in Scilit:
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- Some Electrical and Magnetic Properties of GarnetsJournal of Applied Physics, 1959
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- Dispersion and absorption in magnetic ferrites at frequencies above one Mc/sPhysica, 1948