Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Bogdan F. Valcu"'
Publikováno v:
AIP Advances, Vol 7, Iss 5, Pp 056504-056504-10 (2017)
A technique to determine experimentally the reader resolution in magnetic recording by using pseudo-random sequence (PRS) patterns written on the disc is presented. The spectrum of the PRS signal is analyzed to extract simultaneously the width of the
Externí odkaz:
https://doaj.org/article/1133ce4f632948cfa2020e05701a559b
Publikováno v:
IEEE Transactions on Magnetics. 51:1-5
Publikováno v:
IEEE Transactions on Magnetics. 50:1-4
Autor:
Bogdan F. Valcu, Michael Alex
Publikováno v:
IEEE Transactions on Magnetics. 49:3648-3651
To achieve high linear densities in magnetic recording noise as well as distortions must be reduced. A significant source of distortions is the interaction between consecutive magnetic transitions that produces a nonlinear transition shift (NLTS). Us
Publikováno v:
IEEE Transactions on Magnetics. 47:63-68
The function of two types of magnetic inhomogeneity employed in perpendicular magnetic recording media designs are analyzed. Continuous granular composite (CGC) media have variable lateral exchange coupling (Hex) through the thickness of the magnetic
Publikováno v:
IEEE Transactions on Magnetics. 45:3565-3568
In composite media switching of magnetization takes place through domain wall reversal, rather than coherent rotation, characteristic of Stoner-Wohlfarth (S-W) media. The angular dependence of coercivity on applied field angle deviates significantly
Autor:
Bogdan F. Valcu
Publikováno v:
IEEE Transactions on Magnetics. 45:3576-3579
Hard axis loops are measured for composite magnetic films, consisting of a hard magnetic layer ferromagnetically exchange coupled to a soft magnetic layer. A quasi-analytic spin chain model is able to fully explain the experimental findings. The agre
Publikováno v:
IEEE Transactions on Magnetics. 44:3412-3415
Using a ldquodragrdquo tester in which the recording head is in direct contact with a perpendicular media disc, we show experimentally that the footprint of the head has a ldquodoughnutrdquo shape, as predicted by theory. A change in the switching pr
Publikováno v:
2015 IEEE Magnetics Conference (INTERMAG).
HAMR technology has experienced big advances in just this last year but hurdles still abound and need to be resolved before HAMR can fulfill its full potential for both lifetime and areal density capability [1,2]. A few of these challenges are direct
Publikováno v:
Journal of Applied Physics. 92:6094-6098
The control of grain size statistics is essential in the manufacture of granular thin films used in high-density recording. In this article transmission electron microscope observations of perpendicular media are shown that indicate larger grain size