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High-Quality Ferromagnet Fe3GeTe2 for High-Efficiency Electromagnetic Wave Absorption and Shielding with Wideband Radar Cross Section Reduction
ACS Nano ( IF 15.8 ) Pub Date : 2022-04-25 , DOI: 10.1021/acsnano.2c00512 Guanghao Li 1 , Suping Ma 1 , Zhuo Li 1 , Yawen Zhang 1 , Jianglin Diao 1 , Lun Xia 1 , Zhiwei Zhang 1 , Yi Huang 1
ACS Nano ( IF 15.8 ) Pub Date : 2022-04-25 , DOI: 10.1021/acsnano.2c00512 Guanghao Li 1 , Suping Ma 1 , Zhuo Li 1 , Yawen Zhang 1 , Jianglin Diao 1 , Lun Xia 1 , Zhiwei Zhang 1 , Yi Huang 1
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A high-quality Fe3GeTe2 single crystal with good electrical, magnetic, and electromagnetic wave absorption and shielding properties was prepared in a large quantity (10 g level) by solid-phase sintering and recrystallization method, which would promote its in-depth research and practical application. It has good room-temperature electrical properties with a mobility of 42 cm2/V·s, a sheet (bulk) carrier concentration of +1.64 × 1018 /cm2 (+3.28 × 1020 /cm3), and a conductivity of 2196.35 S/cm. Also, a Curie temperature of 238 K indicates the high magnetic transition temperature and a paramagnetic Curie temperature of 301 K shows the large ferromagnetic–paramagnetic transition zone induced by the residual short-range ferromagnetic domains. Particularly, Fe3GeTe2 is in a loosely packed state when used as a loss agent; the electromagnetic wave absorption with a reflection loss of −34.7 dB at 3.66 GHz under thin thickness was shown. Meanwhile, the absorption band can be effectively regulated by varying the thickness. Moreover, Fe3GeTe2 in a close-packed state exhibits terahertz shielding values of 75.1 and 103.2 dB at very thin thicknesses of 70 and 380 μm, and the average shielding value is higher than 47 dB, covering the entire bandwidth from 0.1 to 3.0 THz. Furthermore, by using Fe3GeTe2 as a patch, the wideband radar cross-section can be effectively reduced by up to 33 dBsm. Resultantly, Fe3GeTe2 will be a promising candidate in the electromagnetic protection field.
中文翻译：
高品质铁磁体 Fe3GeTe2 用于高效电磁波吸收和屏蔽以及宽带雷达横截面减小
采用固相烧结再结晶法大量制备（10 g级）具有良好电学、磁学和电磁波吸收屏蔽性能的优质Fe 3 GeTe 2单晶，将促进其深入研究研究和实际应用。具有良好的室温电性能，迁移率为42 cm 2 /V·s，片状（体）载流子浓度为+1.64×10 18 /cm 2（+3.28×10 20 /cm 3), 电导率为 2196.35 S/cm。此外，238 K 的居里温度表示高磁转变温度，301 K 的顺磁居里温度表示由残余短程铁磁畴引起的大铁磁-顺磁转变区。特别是Fe 3 GeTe 2用作损耗剂时呈松散堆积状态；显示了薄厚度下在 3.66 GHz 时反射损耗为 -34.7 dB 的电磁波吸收。同时，通过改变厚度可以有效地调节吸收带。此外，Fe 3 GeTe 2在密堆积状态下，在 70 和 380 μm 的非常薄的厚度下表现出 75.1 和 103.2 dB 的太赫兹屏蔽值，并且平均屏蔽值高于 47 dB，覆盖从 0.1 到 3.0 THz 的整个带宽。此外，通过使用 Fe 3 GeTe 2作为贴片，宽带雷达截面可以有效降低高达 33 dBsm。因此，Fe 3 GeTe 2将成为电磁防护领域的一个有前途的候选者。
更新日期：2022-04-25
中文翻译：
高品质铁磁体 Fe3GeTe2 用于高效电磁波吸收和屏蔽以及宽带雷达横截面减小
采用固相烧结再结晶法大量制备（10 g级）具有良好电学、磁学和电磁波吸收屏蔽性能的优质Fe 3 GeTe 2单晶，将促进其深入研究研究和实际应用。具有良好的室温电性能，迁移率为42 cm 2 /V·s，片状（体）载流子浓度为+1.64×10 18 /cm 2（+3.28×10 20 /cm 3), 电导率为 2196.35 S/cm。此外，238 K 的居里温度表示高磁转变温度，301 K 的顺磁居里温度表示由残余短程铁磁畴引起的大铁磁-顺磁转变区。特别是Fe 3 GeTe 2用作损耗剂时呈松散堆积状态；显示了薄厚度下在 3.66 GHz 时反射损耗为 -34.7 dB 的电磁波吸收。同时，通过改变厚度可以有效地调节吸收带。此外，Fe 3 GeTe 2在密堆积状态下，在 70 和 380 μm 的非常薄的厚度下表现出 75.1 和 103.2 dB 的太赫兹屏蔽值，并且平均屏蔽值高于 47 dB，覆盖从 0.1 到 3.0 THz 的整个带宽。此外，通过使用 Fe 3 GeTe 2作为贴片，宽带雷达截面可以有效降低高达 33 dBsm。因此，Fe 3 GeTe 2将成为电磁防护领域的一个有前途的候选者。
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