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Integrating giant microwave absorption with magnetic refrigeration in one multifunctional intermetallic compound of LaFe11.6Si1.4C0.2H1.7

机译:在一种多功能的LaFe11.6Si1.4C0.2H1.7多功能金属互化物中将巨大的微波吸收与磁制冷相结合

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摘要

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.
机译:微波吸收和磁热效应(MCE)都是磁性材料的两个基本性能。我们观察到LaFe11.6Si1.4C0.2H1.7金属间化合物既具有超过-42 dB的巨大微波吸收又具有-20 Jkg -1 K -1 < / sup>。出色的电磁波吸收归因于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。这种材料中巨大的MCE效应为冷却MAM提供了一种理想的技术,可避免微波吸收过程中温度升高和红外辐射。我们的发现表明,我们可以将巨大的微波吸收与磁致冷集成在一种多功能材料中。这种集成不仅增进了我们对微波吸收与MCE之间关系的理解,而且可以开辟一条利用微波设备和电磁隐身的新途径。

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