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

Volume

41

Issue

10

fYear

2005

Firstpage

3889

Lastpage

3891

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.854947

Filename

1519478