Magnetic and Atomic Structure Parameters of Sc-doped Barium Hexagonal Ferrites

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.2838232· OSTI ID:959702

Yang, A; Chen, Y; Chen, Z; Vittoria, C; Harris, V

Scandium-doped M-type barium hexagonal ferrites of the composition BaFe12?xScxO19 are well suited for low frequency microwave device applications such as isolators and circulators. A series of Sc-doped M-type barium hexagonal ferrite powders (x = 0-1.2) were prepared by conventional ceramic processing techniques. The resulting powders were verified to be pure phase and maintain the nominal chemical stoichiometry by x-ray diffraction and energy dispersive x-ray spectroscopy, respectively. Static magnetic measurements indicated that both saturation magnetization and uniaxial magnetocrystalline anisotropy field decreased with increasing concentration of scandium. Extended x-ray absorption fine structure measurements were carried out to clarify the correlation between the magnetic and atomic structure properties. It is found that the substituted Sc has a strong preference for the bipyramidal site. Nevertheless, the substitution did not introduce additional atomic structural disorder into the barium hexagonal structure. The structural study provided important evidence to quantitatively explain the change in dc and microwave magnetic properties due to Sc ion doping.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 959702
• Report Number(s): BNL--82688-2009-JA
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Vol. 103; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
ANISOTROPY
BARIUM
CERAMICS
FERRITE
FERRITES
FINE STRUCTURE
MAGNETIC PROPERTIES
MAGNETIZATION
PROCESSING
SATURATION
SCANDIUM
STOICHIOMETRY
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
national synchrotron light source