Hostname: page-component-7479d7b7d-jwnkl Total loading time: 0 Render date: 2024-07-12T03:29:08.526Z Has data issue: false hasContentIssue false
  • English
  • Français

Behavior of Magnetic Domains in Single Magnetic Nanowire with Shallow Trench along Length Direction Observed by Magnetic Force Microscopy

Published online by Cambridge University Press:  15 May 2013

Mitsunobu Okuda ,
Yasuyoshi Miyamoto ,
Eiichi Miyashita  and
Naoto Hayashi
Mitsunobu Okuda
Affiliation:
NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya-ku, Tokyo, 157-8510, Japan
Yasuyoshi Miyamoto
Affiliation:
NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya-ku, Tokyo, 157-8510, Japan
Eiichi Miyashita
Affiliation:
NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya-ku, Tokyo, 157-8510, Japan
Naoto Hayashi
Affiliation:
NHK Science & Technology Research Laboratories, 1-10-11 Kinuta, Setagaya-ku, Tokyo, 157-8510, Japan
Get access

Abstract

We have proposed new magnetic memories using parallel-aligned nanowires without mechanical moving parts, in order to achieve the ultra high transfer rate of more than 144 Gbps for Super Hi-Vision TV. In the magnetic memory using nanowires, the data are stored as the magnetic domains with up or down magnetization in magnetic nanowires, and the domains are shifted quite faster by applying optimum current along the nanowire direction for data writing and reading purpose. Since the electric circuits and the insulation space between the neighbor nanowires are necessary for moving the magnetic domain walls, the areal recording density is essentially reduced as compared with that of conventional hard disk drives. In this study, in order to increase the areal recording density of magnetic nanowire memory, we have tried to act one magnetic nanowire as the virtual multiple data tracks. The shallow scratched trench was introduced using scanning probe microscopy along the length direction on the surface of a single nanowire to form multiple internal tracks, and we have succeeded in realizing a couple of virtual tracks states.

Keywords

scanning probe microscopy (SPM)magnetic propertiesnano-indentation
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1527: Symposium UU – Scanning Probe Microscopy―Frontiers in Nanotechnology , 2013 , mrsf12-1527-uu06-25
Copyright
Copyright © Materials Research Society 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Misu, T., Matsuo, Y., Iwamura, S., Sakaida, S., and Shishikui, Y., “Reconstructive Video Coding System”, IEEE GCCE 2012, pp.558–560, (2012).Google Scholar
Tanigawa, H., Koyama, T., Yamada, G., Chiba, D., Kasai, S., Fukami, S., Suzuki, T., Ohshima, N., Ishiwata, N., Nakatani, Y., and Ono, T., “Domain Wall Motion Induced by Electric Current in a Perpendicularly Magnetized Co/Ni Nano-Wire” Appl. Phys. Express, vol. 2, pp. 053002–1-053002-3, (2009).CrossRefGoogle Scholar
Yamaguchi, A., Ono, T., Nasu, S., Miyake, K., Mibu, K., and Shinjo, T., “Real-Space Observation of Current-Driven Domain Wall Motion in Submicron Magnetic Wires” Phys. Rev. Lett., vol. 92, pp. 077205–1-077205-4, (2004).CrossRefGoogle ScholarPubMed
Parkin, S. S. P., Hayashi, M. and Thomas, L., “Magnetic Domain-Wall Racetrack Memory”, Science, 320, pp. 190–194, (2008).CrossRefGoogle ScholarPubMed
Jiang, X., Thomas, L., Moriya, R., Hayashi, M., Bergman, B., Rettner, C. and Parkin, S. S.P., “Enhanced stochasticity of domain wall motion in magnetic racetracks due to dynamic pinning” Nature Communications, vol. 1, article number: 25, (2010).CrossRefGoogle ScholarPubMed
Myers, E. B., Ralph, D. C., Katine, J. A., Louie, R. N., and Buhrman, R. A., “Current-Induced Switching of Domains in Magnetic Multilayer Devices” Science, 285, pp. 867–870, (1999).CrossRefGoogle ScholarPubMed