Formation of magnetically-oriented barium hexaferrite films by aerosol deposition

•Aerosol deposition is used to grow barium hexaferrite films.•A 4 kOe magnetic field was placed during deposition to magnetically orient the films.•Films are found to be oriented out-of-plane.•Sintering the films further improved the magnetic properties.•March-Dollase factor finds 29% grain alignmen...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2019-06, Vol.479, p.156-160
Main Authors: Johnson, Scooter D., Park, Dong-Soo, Qadri, Syed B., Gorzkowski, Edward P.
Format: Article
Language:English
Subjects:
Aerosol deposition
Barium hexaferrite
Ceramics
Circulator
Coercivity
Crystallography
Deposition
Grain orientation
Magnetic anisotropy
Magnetic properties
Magnetic saturation
Magnetism
Microwave
Permanent magnets
Self-bias
Substrates
Texturing
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Aerosol deposition is used to grow barium hexaferrite films.•A 4 kOe magnetic field was placed during deposition to magnetically orient the films.•Films are found to be oriented out-of-plane.•Sintering the films further improved the magnetic properties.•March-Dollase factor finds 29% grain alignment. We have deposited polycrystalline films of barium hexaferrite utilizing aerosol deposition at room temperature. Magnetic orientation was achieved by using a 4 kOe permanent magnet mounted in close proximity to the substrate during deposition. We find that these films show crystallographic orientation and magnetic anisotropy out of plane corresponding to the {0 0 2l} diffraction planes. To further explore the film properties we performed sintering treatments up to 1000 °C and found that the magnetic properties are further improved. For these films the magnetic saturation is 3683 G with a squareness value of 0.82. The magnetic and crystallographic texturing indicate 29% grain orientation with a coercivity of 4.6 kOe. These values indicate that the films are of good quality for potential integration into microwave systems that require high values of saturation magnetization, squareness, and coercivity with a good degree of self-bias.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2019.02.025