Title :
Magnetic and structural properties of La-substituted ferrites
Author :
Küpferling, M. ; Grössinger, R. ; Wiesinger, G. ; Pieper, M. ; Reissner, M.
Author_Institution :
Dept. of Solid State Phys., Vienna Univ. of Technol., Austria
Abstract :
Production methods for obtaining the metastable LaFe12O19 are described. The magnetic properties of La-substituted Sr hexaferrite and pure LaFe12O19 are summarized. The uniaxial anisotropy of LaFe12O19 increases dramatically with decreasing temperature. This is attributed to a change of the Fe3+ to an Fe2+ on the 2a site which is confirmed by Mössbauer spectroscopy. This leads to a semiconductor behavior visible in the temperature dependence of the electrical resistivity.
Keywords :
Mossbauer spectroscopy; electrical resistivity; ferrimagnetism; ferrites; magnetic anisotropy; LaFe12O19; Mossbauer spectroscopy; Sr; electrical resistivity; ferrites; hexaferrite; magnetic properties; production methods; structural properties; uniaxial anisotropy; Anisotropic magnetoresistance; Ferrites; Iron; Magnetic anisotropy; Magnetic properties; Metastasis; Perpendicular magnetic anisotropy; Production; Strontium; Temperature; Hexaferrites; MÖssbauer spectroscopy; magnetocrystalline anisotropy;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854947
