Magnetic properties of disordered ferrite and ilmenite-hematite thin films

摘要: We have synthesized thin films of disordered zinc ferrite (ZnFe 2 O 4 ) and ilmenite-hematite (FeTiO 3 -Fe solid solution, the former latter which are interesting from viewpoints magnetooptics spintronics, respectively, by utilizing sputtering pulsed laser deposition methods, explored their magnetic, magnetooptical, electrical properties. Although ZnFe possesses a normal spinel structure as its stable phase, some Fe 3+ ions occupy tetrahedral well octahedral sites in sputtered film is composed. Consequently, as-deposited manifests large magnetization even at room temperature although magnetic phase transition low 10 K. Also, exhibits cluster spin glass high 325 Furthermore, exhibit Faraday effects wavelength 400 nm or so. The solution one ferrimagnetic semiconductors. Most compositions possess Curie temperatures higher than temperature, type carrier can be tuned only changing composition. succeeded synthesizing solid-solution various grown epitaxially on sapphire substrates with (0 0 01) plane, shown that