scholarly journals Thickness Dependence of Magnetic Switching Dynamics of Barium-Ferrite as A High-Density Perpendicular Magnetic Storage Media

2017 ◽  
Vol 13 (2) ◽  
pp. 112-118 ◽  
Author(s):  
P. P. Aji ◽  
F. S. Rondonuwu ◽  
N. A. Wibowo
Keyword(s):  
Domain Wall ◽  
Barium Ferrite ◽  
Thickness Dependence ◽  
Magnetic Storage ◽  
Magnetization Dynamics ◽  
Excellent Thermal Stability ◽  
Storage Media ◽  
Magnetic Switching ◽  
Switching Dynamics ◽  
Magnetic Storage Media

Micromagnetic study of material thickness dependence of Barium-ferrite nano-dot magnetization dynamics has been performed. The used materials characteristics in this research represent the properties of Barium-ferrite. Barium-ferrite was modeled as a nano-dot with a surface area of 50 50 nm2 and its thickness varies from 5 nm to 100 nm. This nano-dot was simulated using micromagnetic simulator software by solving Landau-Lifshitz-Gilbert equation. According to this study, obtained that the Barium-ferrite nano-dot has excellent thermal stability. Magnetization rate of this nano-dot decreases exponentially with the increase of thickness. The fastest magnetization rate observed in 5 nm of nano-dot thickness, meanwhile 45 nm for the slowest rate. Magnetization reversal mode of this Barium-ferrite nano-dot is dominated by domain wall nucleation and propagation. During the propagation of the domain wall, the exchange interaction becomes the main aspect compared to the other contributed energies.

scholarly journals New advances on Au–magnetic organic hybrid core–shells in MRI, CT imaging, and drug delivery

RSC Advances ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 6517-6525
Author(s):  
Fatemeh Mohajer ◽  
Ghodsi Mohammadi Ziarani ◽  
Alireza Badiei
Keyword(s):  
Magnetic Resonance Imaging ◽  
Drug Delivery ◽  
Magnetic Nanoparticles ◽  
Targeted Drug Delivery ◽  
Magnetic Storage ◽  
Resonance Imaging ◽  
Organic Hybrid ◽  
Storage Media ◽  
Targeted Drug ◽  
Magnetic Storage Media

Magnetic nanoparticles have been studied for scientific and technological applications such as magnetic storage media, contrast agents for magnetic resonance imaging, biolabelling, separation of biomolecules, and magnetic-targeted drug delivery.

Mössbauer analysis of magnetic storage media

1987 ◽  
Vol 23 (5) ◽  
pp. 2815-2817 ◽  
Author(s):  
W. Vetterling ◽  
F. Habbal ◽  
M. Wober
Keyword(s):  
Magnetic Storage ◽  
Storage Media ◽  
Magnetic Storage Media ◽  
Mössbauer Analysis

Second-harmonic magnetoresistive imaging to authenticate and recover data from magnetic storage media

2001 ◽  
Author(s):  
David P. Pappas ◽  
C. Stephen Arnold ◽  
Gideon Shalev ◽  
Carla Eunice ◽  
D. Stevenson ◽  
...  
Keyword(s):  
Second Harmonic ◽  
Magnetic Storage ◽  
Storage Media ◽  
Magnetic Storage Media

scholarly journals Epitaxial growth of (001) and (111) Ni films on MgO substrates

2000 ◽  
Vol 648 ◽  
Author(s):  
Rosa Alejandra Lukaszew ◽  
Vladimir Stoica ◽  
Ctirad Uher ◽  
Roy Clarke
Keyword(s):  
Epitaxial Growth ◽  
Supported Catalysts ◽  
High Energy ◽  
Scanning Tunneling ◽  
Magnetic Storage ◽  
Tunneling Microscopy ◽  
Ceramic Substrates ◽  
Storage Media ◽  
Annealing Conditions ◽  
Magnetic Storage Media

AbstractMetal-ceramic interfaces are important in applications as diverse as magnetic storage media and supported catalysts. It is very important to understand how the crystallography and microstructure of metallic films deposited onto ceramic substrates depend on growth and/or annealing conditions so that their physical properties (e.g. magnetic, electronic, etc.) can be tailored for specific applications. To this end, we have studied the epitaxial growth and annealing of (001) and (111) Ni films MBE grown on MgO substrates, where we have observed the evolution of the surface using correlated in- situ RHEED (reflection high-energy-electron diffraction) and STM (scanning tunneling microscopy) measurements.

ELECTROCHEMICAL TECHNIQUES TO AID IN THE DEVELOPMENT OF IMPROVED CARBON OVERCOATS ON MAGNETIC STORAGE MEDIA

2002 ◽  
Vol 16 (06n07) ◽  
pp. 968-972
Author(s):  
D. J. BLACKWOOD ◽  
CHEE JOO GOH ◽  
B. TOMCIK
Keyword(s):  
Electrochemical Techniques ◽  
Electrochemical Technique ◽  
Magnetic Storage ◽  
Carbon Overcoat ◽  
Corrosion Properties ◽  
Protective Properties ◽  
Storage Media ◽  
Surface Analysis Techniques ◽  
Carbon Overcoats ◽  
Magnetic Storage Media

With the trend of decreasing the thickness of the carbon overcoat on high-density magnetic recordings, the corrosion properties of a hard disk multilayer structure are becoming a hot issue. An ideal overcoat would be uniform across the disk's surface, have low porosity and electrical conductivity as well as being impermeable to water. However, in reality this is not viable and corrosion is inevitable. One possible method of improving the corrosion resistance of carbon overcoats is to introduce carbide bilayers. In this paper the corrosion protective properties of CrC/C and BC/C nanolaminated overcoat structures have been analyzed by an electrochemical technique based on LPR measurements. The results allowed an overcoat's resistance to be correlated to its porosity and a statistical method was developed to allow easy comparison of results. The results from the electrochemical measurements were correlated with a range of surface analysis techniques.

scholarly journals Correlation of Texture With Magnetic Properties of Thin Film Storage Media

1989 ◽  
Vol 11 (2-4) ◽  
pp. 231-248 ◽  
Author(s):  
E. Hädicke ◽  
A. Werner ◽  
H. Hibst
Keyword(s):  
Hysteresis Loops ◽  
Magnetic Data ◽  
Magnetic Storage ◽  
Micro Structure ◽  
Glass Substrates ◽  
Storage Media ◽  
Deposition Parameters ◽  
Pole Figures ◽  
Magnetic Layers ◽  
Magnetic Storage Media

Thin coherent metal films of Co–Cr alloys on Si or glass substrates were used for high density magnetic storage media. They were made by sputtering or evaporation. Variation of the deposition parameters will change the micro structure especially the texture of the thin magnetic layers. We could relate the crystallographic data (rocking curves and pole figures) with the magnetic data (hysteresis loops). Correlations between deposition parameters and crystallographic and magnetic investigations will be discussed in detail.

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