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Formation of Thick Dense Yttrium Iron Garnet Films Using Aerosol Deposition
Published on: May 15, 2015
High-temperature thermal conductivity of yttrium and rare-earth iron garnets
Makoto Tachibana1, Cédric Bourgès2,3, Takao Mori1,4
1Research Center for Materials Nanoarchitechtonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
Abstract:
Yttrium and rare-earth iron garnets (R3Fe5O12) are ferrimagnetic insulators that have been widely studied for magnetic and spintronic applications. In this study, we report the thermal conductivity (κ) between 300 and 773 K for the single crystals ofR3Fe5O12, whereR= Y, Gd, Dy, and Yb. For Y3Fe5O12, theκup to the Curie temperature (TC≈ 555 K) can be described well with a pure phononic model, without considering conduction or scattering by the magnons. The iron garnets containing magnetic rare-earth ions exhibit smallerκ, with Dy3Fe5O12showing the smallest values due to the strong interactions of heat-carrying phonons with the crystal field excitations of Dy3+ions.
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