Recording characteristics of Co-γFe2O3 perpendicular magnetic recording media

Abstract

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Preparation and R/W Characteristics of Co-<i>&gamma;</i>Fe₂O₃ Longitudinal Magnetic Recording Media

“…We have previously described that the Co containing y -Fe 2 03 on NiO underlayer (Co-y Fe203/NiO) have high coerci vi ty such as 5 kOe and large perpendicular anisotropy [3,4]. These perpendIcular magnetic recording media exhibited high density recording performance and low noise characteristics [5,6].…”

Exchange-Coupled Bimagnetic Cobalt/Iron Oxide Branched Nanocrystal Heterostructures

“…[9][10][11][12][13][14][15][16][17][18] Future breeds of suitably engineered allmagnetic HNCs can thus be expected to pave the way to cost-effective bottom-up fabrication of devices for which thermal stability of magnetization is guaranteed at progressively higher levels of miniaturization. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] As a matter of fact, most advances in the development of HNCs with enhanced anisotropy and/or exhibiting unusual magnetic performances have dealt with associations of exchange-coupled antiferromagnetic (AFM) and ferro-/ ferrimagnetic (FM/FiM) materials in core/shell geometries, 3,[9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]…”

“…[18][19][20] In this regard, it is plausible that the interplay of red-ox reactions (during the synthesis stage) and latticemismatch-induced strain at the Co/TP junction regions may generate a thin interfacial layer 35 with unique compositional and structural features that may unusually affect the overall anisotropy term. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] More sophisticated characterization studies and theoretical modeling are currently underway to elucidate the structural and magnetic nature of the Co/TP interfaces, which appear to be the key for unraveling the specific mechanism that underlies FM-FiM exchange interactions.…”

Cobalt Ferrite Thin Film Hard Disk for High-Density Perpendicular Magnetic Recording

“…We have developed a new preparation method of thin film ferrite applicable to perpendicular magnetic recording, and successful results have been obtained [9][10][11][12][13][14][15][16][17]. In this paper, we will describe a few of our recent experimental results on Co-yFe203lNiO hard disk media.…”