Mr. Chad Warren Profile

Chad Warren

at Univ of California San Diego

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Proceedings Article | 20 September 2018 Presentation + Paper

Synthesis and ferrimagnetic properties of Y3(1-x)Tm3xFe5O12 powders

Chad Warren, Pathikumar Sellappan, Mohammed Aldosary, Yasuhiro Kodera, Jing Shi, Javier Garay

Proceedings Volume 10732, 107320G (2018) https://doi.org/10.1117/12.2322109

KEYWORDS: Magnetism, Iron, Anisotropy, Thulium, Garnet, Absorption, Solids, Crystals

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Rare earth iron garnets (REIG’s) are important component materials in magnetic insulator based spintronics due to their low spin wave damping and electrically insulating properties. Yttrium iron garnet (YIG) has been the mainstay material because of its unusually low spin damping. However, YIG thin films thus far have in-plane magnetization. Recent studies on thulium iron garnet (TIG) thin films have demonstrated robust perpendicular magnetic anisotropy (PMA), however, spin damping in TIG films is significantly higher compared to YIG. It would be useful to have an insulating magnetic material that exhibits both low spin damping and robust, tunable PMA because of its potential for novel device configurations. In this study, we synthesized YIG-TIG solid solution powders across the compositional phase diagram and with different particle sizes using the polymeric steric entrapment technique in order to begin to decouple compositional effects from size and morphological effects. Powder characterization, including XRD, VSM, SEM and FMR techniques, was also performed to understand their magnetic behavior.

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