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- Title
Multimetal-Substituted Epsilon-Iron Oxide ϵ-Ga<sub>0.31</sub>Ti<sub>0.05</sub>Co<sub>0.05</sub>Fe<sub>1.59</sub>O<sub>3</sub> for Next-Generation Magnetic Recording Tape in the Big-Data Era.
- Authors
Ohkoshi, Shin ‐ ichi; Namai, Asuka; Yoshikiyo, Marie; Imoto, Kenta; Tamazaki, Kazunori; Matsuno, Koji; Inoue, Osamu; Ide, Tsutomu; Masada, Kenji; Goto, Masahiro; Goto, Takashi; Yoshida, Takayuki; Miyazaki, Tatsuro
- Abstract
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 ϵ-Fe2O3, ϵ-GaIII0.31TiIV0.05CoII0.05FeIII1.59O3, nanoparticles with an average size of 18 nm. Ga, Ti, and Co cations tune the magnetic properties of ϵ-Fe2O3 to the specifications demanded for a magnetic recording tape. The coercive field was tuned to 2.7 kOe by introduction of single-ion anisotropy on CoII ( S=3/2) along the c-axis. The saturation magnetization was increased by 44 % with GaIII ( S=0) and TiIV ( 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.
- Subjects
BIG data; DATA tapes; MAGNETIC recording media; MAGNETIC storage; CATIONS
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 38, p11575
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201604647