Multimetal-Substituted Epsilon-Iron Oxide -Ga sub(0.31)Ti sub(0.05)Co sub(0.05)Fe sub(1.59)O sub(3) for Next-Generation Magnetic Recording Tape in the Big-Data Era

From the viewpoints of large capacity, long-term guarantee, and low cost, interest in magnetic recording tapes has undergone a revival as an archive storage media for big data. Herein, we prepared a new series of metal-substituted -Fe sub(2)O sub(3), -Ga super(III) sub(0.31)Ti super(IV) sub(0.05)Co super(II ) sub(0.05)Fe super(III) sub(1.59)O sub(3), nanoparticles with an average size of 18nm. Ga, Ti, and Co cations tune the magnetic properties of -Fe sub(2)O sub(3) to the specifications demanded for a magnetic recording tape. The coercive field was tuned to 2.7kOe by introduction of single-ion anisotropy on Co super(II) (S=3/2) along the c-axis. The saturation magnetization was increased by 44% with Ga super(III) (S=0) and Ti super(IV) (S=0) substitution through the enhancement of positive sublattice magnetizations. The magnetic tape media was fabricated using an actual production line and showed a very sharp signal response and a remarkably high signal-to-noise ratio compared to the currently used magnetic tape.Original Abstract: Aufnahmepruefung: Durchschnittlich 18nm grose metallsubstituierte -Fe sub(2)O sub(3)-Nanopartikel der Zusammensetzung -Ga super(III) sub(0.31)Ti super(IV) sub(0.05)Co super(II ) sub(0.05)Fe super(III) sub(1.59)O sub(3) wurden synthetisiert. Die Ga-, Ti- und Co-Kationen modifizieren die magnetischen Eigenschaften von -Fe sub(2)O sub(3) fuer eine Anwendung in Magnetbaendern. Ein solches Magnetband mit hohem Signal-Rausch-Verhaeltnis belegt das Potenzial fuer die Speicherung groser Datenmengen.