Theory of Noise in Magnetic Recording Tape Coated with Magnetic Particles

1962 ◽  
Vol 33 (4) ◽  
pp. 1591-1596 ◽  
Author(s):  
Itsuo Mikami
Keyword(s):  
Magnetic Recording ◽  
Magnetic Particles ◽  
Recording Tape

scholarly journals Importance of Flexural Rigidity for Magnetic Recording Tape

1998 ◽  
Vol 66 (5) ◽  
pp. 560-562
Author(s):  
Akira ISHIKAWA ◽  
Noriyuki KITAORI ◽  
Satoshi SHIMIZU ◽  
Osamu YOSHIDA
Keyword(s):  
Magnetic Recording ◽  
Flexural Rigidity ◽  
Recording Tape

Multimetal-Substituted Epsilon-Iron Oxide ϵ-Ga0.31 Ti0.05 Co0.05 Fe1.59 O3 for Next-Generation Magnetic Recording Tape in the Big-Data Era

2016 ◽  
Vol 128 (38) ◽  
pp. 11575-11578 ◽  
Author(s):  
Shin-ichi Ohkoshi ◽  
Asuka Namai ◽  
Marie Yoshikiyo ◽  
Kenta Imoto ◽  
Kazunori Tamazaki ◽  
...  
Keyword(s):  
Big Data ◽  
Iron Oxide ◽  
Magnetic Recording ◽  
Next Generation ◽  
Recording Tape

scholarly journals Stability of equidimensional pseudo–single-domain magnetite over billion-year timescales

2017 ◽  
Vol 114 (39) ◽  
pp. 10356-10360 ◽  
Author(s):  
Lesleis Nagy ◽  
Wyn Williams ◽  
Adrian R. Muxworthy ◽  
Karl Fabian ◽  
Trevor P. Almeida ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Magnetic Recording ◽  
Theoretical Basis ◽  
Magnetic Particles ◽  
High Fidelity ◽  
Laboratory Measurements ◽  
Stable States ◽  
Thermally Activated ◽  
Naturally Occurring ◽  
Magnetic Stability

Interpretations of paleomagnetic observations assume that naturally occurring magnetic particles can retain their primary magnetic recording over billions of years. The ability to retain a magnetic recording is inferred from laboratory measurements, where heating causes demagnetization on the order of seconds. The theoretical basis for this inference comes from previous models that assume only the existence of small, uniformly magnetized particles, whereas the carriers of paleomagnetic signals in rocks are usually larger, nonuniformly magnetized particles, for which there is no empirically complete, thermally activated model. This study has developed a thermally activated numerical micromagnetic model that can quantitatively determine the energy barriers between stable states in nonuniform magnetic particles on geological timescales. We examine in detail the thermal stability characteristics of equidimensional cuboctahedral magnetite and find that, contrary to previously published theories, such nonuniformly magnetized particles provide greater magnetic stability than their uniformly magnetized counterparts. Hence, nonuniformly magnetized grains, which are commonly the main remanence carrier in meteorites and rocks, can record and retain high-fidelity magnetic recordings over billions of years.

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