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Single Crystals of Cubic Ferrite Containing Only Fe 3+ as Magnetic Ions
Author(s) -
Rezlescu E.,
Rezlescu N.,
Craus M. L.,
Pasnicu C.,
Rezlescu L.
Publication year - 1996
Publication title -
crystal research and technology
Language(s) - French
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170310605
Subject(s) - curie temperature , crystallography , ferrite (magnet) , saturation (graph theory) , materials science , ion , magnetization , crystallization , chemistry , physics , ferromagnetism , condensed matter physics , magnetic field , mathematics , organic chemistry , combinatorics , quantum mechanics , composite material
Single crystals of LiFe 5 O 8 and Y 3 Fe 5 O 12 are of considerable interest for microwave applications. These were grown by spontaneous crystallization from fluxed melts by slow cooling. The quality of the obtained crystals were analyzed by X‐ray diffraction and by measuring of the characteristic parameters (saturation magnetization σ s , Curie temperature T c , density D , hardness H v ). Although the both ferrites involve Fe 3+ as the only magnetic ions which are responsible for the magnetic properties of these ferrites, several essential differences are found attributing to the particularity of their crystalline structure. Les cristaux de LiFe 5 O 8 Y 3 Fe 5 O 12 suscitent un considerable interět pour les applications dans le domain de microondes. Le developpement des cristaux est provoqué par la cristalisation spontane, pendant le procesus de mélange des flux fondus, en regime de refroidissemnet lent. La qualité de ces cristaux ainsi obtenus a été analisée à l'aide de la diffraction des rayons X et du messurement des paramètres caractéristiques (magnetisation de saturation σ s , température Curie T c , dénsité D , dureté H v ). Quique les deux ferrites impliquent les Fe 3+ comme les seuls ions résponsables pour les proprietés magnétiques, beaucoup d'autres differences sont trouvées provenant de la particularité de leur structure cristalline.