scholarly journals Magnetic Recording of Superconducting States

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1022 ◽  
Author(s):  
Gorky Shaw ◽  
Sylvain Blanco Blanco Alvarez ◽  
Jérémy Brisbois ◽  
Loïc Burger ◽  
Lincoln B. L. G. Pinheiro ◽  
...  
Keyword(s):  
Magnetic Recording ◽  
Magnetic Layer ◽  
Ex Situ ◽  
Soft Magnetic ◽  
Superconducting Layer ◽  
Hard Drives ◽  
Binary Information ◽  
Drawing Board ◽  
Local Polarization ◽  
Compelling Experimental Evidence

Local polarization of magnetic materials has become a well-known and widely used method for storing binary information. Numerous applications in our daily life such as credit cards, computer hard drives, and the popular magnetic drawing board toy, rely on this principle. In this work, we review the recent advances on the magnetic recording of inhomogeneous magnetic landscapes produced by superconducting films. We summarize the current compelling experimental evidence showing that magnetic recording can be applied for imprinting in a soft magnetic layer the flux trajectory taking place in a superconducting layer at cryogenic temperatures. This approach enables the ex situ observation at room temperature of the imprinted magnetic flux landscape obtained below the critical temperature of the superconducting state. The undeniable appeal of the proposed technique lies in its simplicity and the potential to improve the spatial resolution, possibly down to the scale of a few vortices.

Thermal decomposition and desorption of PFPE Zdol on a DLC substrate using quartic bond interaction potential

RSC Advances ◽  
2015 ◽  
Vol 5 (85) ◽  
pp. 69651-69659 ◽  
Author(s):  
S. K. Deb Nath
Keyword(s):  
Thermal Decomposition ◽  
Interaction Potential ◽  
Magnetic Recording ◽  
Magnetic Layer ◽  
Hard Disk ◽  
Carbon Overcoat ◽  
Heat Assisted Magnetic Recording ◽  
Reading And Writing ◽  
Bond Interaction ◽  
Laser Rays

In heat assisted magnetic recording (HAMR) system, heating of the hard disk magnetic layer is carried out by applying laser rays during the movement of the read/write head over the carbon overcoat for the purpose of reading and writing on its magnetic layer.

Influence of a helical anisotropy profile on the static and dynamic properties of a soft magnetic layer

2012 ◽  
Vol 85 (9) ◽  
Author(s):  
M. Gloanec ◽  
S. Dubourg ◽  
O. Acher ◽  
F. Duverger ◽  
D. Plessis ◽  
...  
Keyword(s):  
Dynamic Properties ◽  
Magnetic Layer ◽  
Soft Magnetic ◽  
Helical Anisotropy

Co3Pt Nanocomposite Films for Perpendicular Magnetic Recording Media

2010 ◽  
Vol 123-125 ◽  
pp. 27-30 ◽  
Author(s):  
Chih Long Shen ◽  
Po Cheng Kuo ◽  
S.C. Chen ◽  
C.D. Chen ◽  
S.L. Hsu ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Process Parameters ◽  
Magnetic Recording ◽  
Magnetic Layer ◽  
Nanocomposite Films ◽  
Recording Media ◽  
Magnetic Recording Media ◽  
Perpendicular Magnetic Recording ◽  
Significant Potential

The Co3Pt magnetic layer with thickness of 7~28 nm was deposited onto the Pt underlayer. The as-deposited Co3Pt/Pt double-layered films with or without a 5 nm Pt capped layer were annealed at temperatures between 275 and 375 °C in vacuum of 1 mTorr. The influences of process parameters on perpendicular magnetic properties of Co3Pt thin films were investigated. The Co3Pt film with perpendicular coercivity (Hc⊥) value of 3620 Oe and the perpendicular squareness (S⊥) of 0.7 could be achieved from the Co3Pt(18 nm)/Pt(100 nm) double-layered films by annealing at 300°C. Further added Tb30Co70 film on the Co3Pt/Pt double-layered film could greatly enhance the perpendicular magnetic properties of the film. The Hc⊥ and S⊥ of the Tb30Co70/Co3Pt/Pt film were as high as 6560 Oe and 0.88, respectively, which has significant potential to be applied in perpendicular magnetic recording media.

scholarly journals Convergence Analysis of a Fourier-Based Solution Method of the Laplace Equation for a Model of Magnetic Recording

2008 ◽  
Vol 2008 ◽  
pp. 1-11 ◽  
Author(s):  
John L. Fleming
Keyword(s):  
Magnetic Recording ◽  
Solution Method ◽  
Infinite System ◽  
Formal Analysis ◽  
Mathematical Problem ◽  
Linear Equations ◽  
Head Model ◽  
Hard Drives ◽  
Recording Heads ◽  
Read Head

When engineers model the magnetostatic fields applied to recording heads of computer hard drives due to a magnetic recording medium, the solution of Laplace's equation must be found. A popular solution method is based on Fourier analysis. However, due to the geometry of the read head model, an interesting mathematical problem arises. The coefficients for the Fourier series solution of the desired magnetic potential satisfy an infinite system of linear equations. In practice, the infinite system is truncated to a finite system with little consideration for the effect this truncation has on the solution. The paper will provide a proper understanding of the underlying problem and a formal analysis of the effect of truncation.

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