Integrating giant microwave absorption with magnetic refrigeration in one multifunctional intermetallic compound of LaFe(11.6)Si(1.4)C(0.2)H(1.7).

Integrating giant microwave absorption with magnetic refrigeration in one multifunctional intermetallic compound of LaFe(11.6)Si(1.4)C(0.2)H(1.7).
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将巨微波吸收与磁制冷集成在一种多功能金属间化合物 LaFe11.6Si1.4C0.2H1.7 中

DOI:
10.1038/srep02291
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发表时间:
2013
期刊:
影响因子:
4.6
通讯作者:
Cheng, Zhao-Hua
Cheng, Zhao-Hua
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Song, Ning-Ning;Ke, Ya-Jiao;Yang, Hai-Tao;Zhang, Hu;Zhang, Xiang-Qun;Shen, Bao-Gen;Cheng, Zhao-Hua

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微波吸收和磁热效应是磁性材料的两个基本性能。我们观察到LaFe11.6Si1.4C0.2H1.7金属间化合物具有超过−42 dB的巨大微波吸收和−20 Jkg−1K−1的磁熵变的优点。  其优异的电磁波吸收性能是由于其具有较大的磁损耗和介电损耗,以及相对介电常数和磁导率之间的有效互补性。这种材料中的巨大MCE效应为冷却MAMs提供了理想的技术,以避免微波吸收过程中的温度升高和红外辐射。我们的发现表明,我们可以在一个多功能材料中集成巨微波吸收和磁制冷。这不仅加深了人们对微波吸收与MCE相关性的理解,而且为微波器件的开发和电磁隐身开辟了一条新的途径。
Both microwave absorption and magnetocaloric effect (MCE) are two essential performances of magnetic materials. We observe that LaFe11.6Si1.4C0.2H1.7 intermetallic compound exhibits the advantages of both giant microwave absorption exceeding −42 dB and magnetic entropy change of −20 Jkg−1K−1. The excellent electromagnetic wave absorption results from the large magnetic loss and dielectric loss as well as the efficient complementarity between relative permittivity and permeability. The giant MCE effect in this material provides an ideal technique for cooling the MAMs to avoid temperature increase and infrared radiation during microwave absorption. Our finding suggests that we can integrate the giant microwave absorption with magnetic refrigeration in one multifunctional material. This integration not only advances our understanding of the correlation between microwave absorption and MCE, but also can open a new avenue to exploit microwave devices and electromagnetic stealth.
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