AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
Barium Hexaferrite and Yttrium Iron Garnet Thick Films Formed by the Aerosol Deposition Method
SCOOTER JOHNSON, Shu-Fan Cheng, Ming-Jen Pan, Fritz Kub, Charles Eddy, U.S. Naval Research Laboratory, Washington, D.C.
Abstract Number: 151 Working Group: Nanoparticles and Materials Synthesis
Abstract The deposition of thick films of nano-crystalline barium hexaferrite (BaFe12O19) (BaM) and Yttrium Iron Garnet (Y3Fe5O12) (YIG) for application in high power passive rf electronic components by the aerosol deposition method (ADM) is presented.
The advantages of the ADM include the ability to form dense ceramic films up to hundreds of microns thick at room temperature and at a high deposition rate on a variety of substrates. Deposition is achieved by creating a pressure gradient that accelerates particles in an aerosol to a velocity up to 400 m/s. Upon impact with the target the particles fracture and embed. Continual deposition forms the thick compacted film.
BaM and YIG films are characterized for their structural, morphological and magnetic properties by scanning electron microscopy, profilometry, and vibrating sample magnetometry, respectively. For BaM, magnetic saturation of the film is 80 % of the bulk value of 68 emu/g, but a significant increase in coercive field suggests significant particle fracturing. All samples have a squareness value near 0.5 indicating randomized orientation of the magnetization. YIG and BaM films of 10 mm in length deposited for 5 minutes resulted in an approximately 200 micron thick film or a deposition rate of 40 microns/min.