Low-loss YIG thick films for microwave applications. Issue 4 (March 2019)

• Record Type: Journal Article
• Authors: C, Mahender; T P, Sumangala; Ade, Ramesh; A, Saranya; Prasad, Shiva; Venkataramani, N.
• Is Part Of: Ceramics international. Volume 45:Issue 4(2019)
• Page Start: 4316
• Page End: 4321
• Publication Date: 2019-03
• Subjects: Co-precipitation -- Thick films -- Ferromagnetic resonance -- Microwave applications; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.11.106
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: We report the fabrication, densification and characterization of polycrystalline free-standing yttrium iron garnet Y3 Fe5 O12 (YIG) thick films in this paper. The thick films were fabricated using a double doctor blade technique from co-precipitated nanocrystalline YIG powders. The sintering temperature of YIG thick films was varied from 1000 to 1400°C. A volume diffusion mechanism is seen to govern the densification process. A high relative density of ~99% could be achieved in a YIG thick film, with a thickness of 80 µm, sintered at a relatively low temperature of 1300 °C. The magnetization value ~1750 Oe, near to the YIG bulk magnetization value and an acceptable low ferromagnetic resonance (FMR) linewidth (∆H) of 80 Oe resulted in these high density YIG thick films with microwave device possibilities.