# Influence of stray fields on the switching-field distribution for bit-patterned media based on pre-patterned substrates

@article{Pfau2014InfluenceOS,
title={Influence of stray fields on the switching-field distribution for bit-patterned media based on pre-patterned substrates},
author={Bastian Pfau and Christian M. G{\"u}nther and Erik Guehrs and Thomas Hauet and Tyler Hennen and Stefan Eisebitt and Olav Hellwig},
journal={Applied Physics Letters},
year={2014},
volume={105},
pages={132407}
}
• Published 1 October 2014
• Physics
• Applied Physics Letters
Using a direct imaging method, we experimentally investigate the reversal of magnetic islands in a bit-patterned media sample based on a pre-patterned substrate. Due to systematic variation of the island distances in the media, we are able to study the influence of the dipolar interaction on the switching-field distribution of the island ensemble. The experimental findings are explained by an analytical magnetostatic model that allows us to quantify the different components of the demagnetizing…
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## References

SHOWING 1-10 OF 25 REFERENCES

### Separating dipolar broadening from the intrinsic switching field distribution in perpendicular patterned media

• Physics
• 2007
A critical requirement for bit patterned media applications is the control and minimization of the switching field distribution (SFD). Here, we use the ΔH(M,ΔM) method to separate dipolar

### Origin of magnetic switching field distribution in bit patterned media based on pre-patterned substrates

• Physics
• 2011
Using a combination of synchrotron radiation based magnetic imaging and high-resolution transmission electron microscopy we reveal systematic correlations between the magnetic switching field and the

### Effect of the anisotropy distribution on the coercive field and switching field distribution of bit patterned media

• Materials Science
• 2009
We present a systematic study on the magnetization reversal in square arrays of magnetic nanostructures. To account for the unavoidable inhomogeneities of the magnetic properties due to, i.e.,

### Dependence of Switching Fields on Island Shape in Bit Patterned Media

• Geology
IEEE Transactions on Magnetics
• 2009
Nanofabricated islands in bit patterned media (BPM) for magnetic data storage tend to vary in shape, size, and material properties which leads to variations in switching fields, causing write errors.

### Calculation of individual bit island switching field distribution in perpendicular magnetic bit patterned media

• Physics
• 2011
Bit patterned media (BPM) is a promising candidate to achieve ultrahigh recording density in magnetic data storage. One of the critical issues for BPM in high-density recording is that the switching

### Effect of inter-bit material on the performance of directly deposited bit patterned media

• Physics
• 2012
We evaluated the effects of inter-bit material on the switching performance of bit patterned media (BPM) fabricated by direct deposition of magnetic material onto pre-patterned substrates. We

### Reversal mechanism, switching field distribution, and dipolar frustrations in Co/Pt bit pattern media based on auto-assembled anodic alumina hexagonal nanobump arrays

• Physics
• 2014
We fabricated a perpendicularly magnetized bit pattern media using a hexagonally close-packed auto-assembled anodic alumina template with 100 nm and 50 nm periods by depositing a Co/Pt multilayer to

### Suppression of magnetic trench material in bit patterned media fabricated by blanket deposition onto prepatterned substrates

• Materials Science
• 2008
An attractive approach for bit patterned media fabrication is the blanket deposition of magnetic material onto prepatterned substrates with elevated pillars and recessed trench areas. One issue with

### Intrinsic distribution of magnetic anisotropy in thin films probed by patterned nanostructures.

• Physics
Physical review letters
• 2006
Simulation of coercivity and SFD versus element size allow the distribution of intrinsic anisotropy to be quantified in highly exchanged coupled thin films where the reversal mechanism is one of nucleation followed by rapid domain wall motion.

### Bit patterned media optimization at 1 Tdot/in2 by post-annealing

• Physics
• 2014
We report on the fabrication of 1 Tdot/in2 bit patterned media with high coercivity (HC) and narrow intrinsic switching field distribution (iSFD) based on nanoimprint from a master pattern formed by