Microwave absorption performances of planar anisotropy ferromagnetic Pr2Co17 flakes prepared by high-energy ball-milling process

• Published in: Inorganic chemistry communications Vol. 112; p. 107736
• Main Authors: Li, Jiangtao, Jiang, Linwen, Yang, Shanshan, Chen, Xin, Qiu, Shiwen, He, Mingyu, Wu, Anhua, Chen, Hongbing
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2020
• Subjects: Electromagnetic parameters; High-energy ball-milling; Microwave absorption; Planar anisotropy; Rare-earth alloys; Electromagnetic parameters; Planar anisotropy; Microwave absorption; Rare-earth alloys; High-energy ball-milling
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2019.107736

[Display omitted] •Planar anisotropy Pr2Co17 was fabricated by high-energy ball-milling process.•Magnetic properties and high-frequency electromagnetic parameters were studied.•Cole-Cole plots were used to investigate the process of Debye relaxation.•Strong absorption ability and broad bandwidth at low thicknesses were obtained.•A delta function is used to evaluate effectively the impendence matching degree. Planar anisotropy ferromagnetic Pr2Co17 flakes were synthesized by combining vacuum arc-melting method and high-energy ball-milling process. The saturated magnetization (Ms) and coercive force (Hc) of Pr2Co17 are 111 emu g−1 and 148 Oe, respectively. The high-frequency electromagnetic properties were discussed in detail. The microwave-absorption results show that the RLs (reflection loss values) below −10 dB are obtained in the range of 7.6–11.8 GHz at the thickness of 2.5 mm, which covers most of the X-band (8–12 GHz). For a given matching thickness of 1.5 mm, the RLs below −10 dB are obtained in 12.3–16.2 GHz, which covers most of the Ku-band (12–18 GHz). A delta function is used to evaluate the impendence matching degree. This work indicates that the Pr2Co17 submicron flakes possess strong microwave absorption at a broad bandwidth, thus are promising for the practical applications in microwave-absorption field.