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These systems must provide adequate working power with a commitment not to produce side effects on patients. Therefore, the materials used in these devices must effectively transmit energy, allow for security control, sense real-time variations in case of any issues, and ensure the implementation of closed-loop systems for control. This work extends to the experimental data adjustment of some different coating techniques based on plasma electro-oxidation (PEO) and thermal spray (TS) using fractional-order models. According to the physical structure of the coating in different coating techniques, Cole family models were selected. The experimental data were obtained by means of a vector network analyzer (VNA) in the frequency spectrum from 0.3 MHz to 5 MHz. The results show that some models from the Cole family (the single-dispersion model and inductive model) offered a goodness of fit to the experimental impedance in terms of RMSE error and a squared error R2 close to unity. The use of this type of fractional-order electrical model allows an adjustment with a very small number of elements compared to integer-order models, facilitating its use and a consequent reduction in instrumentation cost and the development of control devices that are more robust and easily miniaturized for embedded applications. Additionally, fractional-order models allow for more accurate assessment in industrial and medical applications.<\/jats:p>","DOI":"10.3390\/s24082563","type":"journal-article","created":{"date-parts":[[2024,4,17]],"date-time":"2024-04-17T08:22:44Z","timestamp":1713342164000},"page":"2563","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Fractional-Order Electrical Modeling of Aluminum Coated via Plasma Electro-Oxidation and Thermal Spray Methods to Optimize Radiofrequency Medical Devices"],"prefix":"10.3390","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2543-3550","authenticated-orcid":false,"given":"Noelia","family":"Vaquero-Gallardo","sequence":"first","affiliation":[{"name":"Department of Electronics Engineering, Eastern Barcelona School of Engineering (EEBE), Technical University of Catalonia\u2014BarcelonaTech (UPC), E-08019 Barcelona, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2544-5642","authenticated-orcid":false,"given":"Oliver","family":"Mill\u00e1n-Blasco","sequence":"additional","affiliation":[{"name":"Department of Electronics Engineering, Eastern Barcelona School of Engineering (EEBE), Technical University of Catalonia\u2014BarcelonaTech (UPC), E-08019 Barcelona, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7977-2577","authenticated-orcid":false,"given":"Herminio","family":"Mart\u00ednez-Garc\u00eda","sequence":"additional","affiliation":[{"name":"Department of Electronics Engineering, Eastern Barcelona School of Engineering (EEBE), Technical University of Catalonia\u2014BarcelonaTech (UPC), E-08019 Barcelona, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,4,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1016\/S0929-8266(01)00126-4","article-title":"Radiofrequency tumor ablation: Principles and techniques","volume":"13","author":"Goldberg","year":"2001","journal-title":"Eur. 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