单晶镱铁石榴石在低温下的圆形复平面磁导率评估
摘要
超导量子比特的运行需要在低温下进行灵敏的读出电路，从而推动了对低温非双向微波组件（如环路器）的需求。然而，对于缺乏专业测量系统的企业和机构而言，在低温下评估这些组件 presents significant challenges。 In developing these cryogenic non-reciprocal components, the temperature dependence of ferrite's magnetic properties is the most critical factor。 Therefore, an evaluation technique for accurately assessing these properties at cryogenic temperatures is essential. In this study, we develop a measurement method to characterize low loss ferrite materials over a temperature range of 300 K to 2 K. The use of the circularly polarized resonance mode TE11n enables the direct estimation of circular complex permeability and the determination of key material parameters, including saturation magnetization and damping constant both essential for assessing the performance of ferrite materials in circulator applications. To validate the reliability of our measurement method, we selected single crystal YIG as the test material, as its magnetic properties at cryogenic temperatures are relatively well known. This demonstration confirms that our method is effective for characterizing various low loss ferrite materials that are potential candidates for compact cryogenic non reciprocal devices.
引用
@article{arxiv.2504.07381,
title = {Evaluation of Circular Complex Permeability in Single-Crystal Yttrium Iron Garnet at Cryogenic Temperatures},
author = {Junta Igarashi and Shota Norimoto and Hiroyuki Kayano and Noriyoshi Hashimoto and Makoto Minohara and Nobu-Hisa Kaneko and Tomonori Arakawa},
journal= {arXiv preprint arXiv:2504.07381},
year = {2025}
}
备注
9 pages, 8 figures. This work has been submitted to the IEEE for possible publication