リニアテープシステム用バリウムフェライト媒体の長期保存性能

摘要

Barium ferrite (BaFe) has the outstanding high recording density characteristic, and is expected as a magnetic recording material that replaces to the present metal particle (MP) for the linear tape system. By this research, comparison testing of BaFe/MP was carried out in terms of the long-term archival stability (chemical stability and thermal stability)-which is an important requirement when used for the digital archive. As a result, though the BaFe has submicroscopic volume that is suitable for high recording density, it turned out that it has the outstanding chemical stability and thermal stability.%バリウムフェライト磁性体(BaFe)は優れた高記録密度特性を有し，アーカイブ用リニアテープにおいて現行のメタル磁性体(MP)に変わる記録磁性材料として期待されている.本研究では，アーカイブ用途の媒体では特に重要な要件となる長期保存性能(化学的安定性，熱的安定性)について，BaFe/MPの比較調査を実施した.その結果，BaFeは高記録密度に適した極微な体積を有しながらも，優れた化学的安定性及び熱安定性を有する事が分かつた.