News Column

New Magnetics Findings Reported from Japan Synchrotron Radiation Research Institute

May 13, 2014



By a News Reporter-Staff News Editor at Journal of Technology -- New research on Magnetics is the subject of a report. According to news reporting originating from Hyogo, Japan, by VerticalNews correspondents, research stated, "The fabrication of FePt nanodots with a high structural quality and the control of their switching fields are key issues in realizing high density bit pattern recording. We have prepared FePt dot patterns for dots with 15-300 nm diameters by electron beam lithography and re-annealing, and studied the relation between magnetization reversal process and structure of FePt nanodots."

Our news editors obtained a quote from the research from Japan Synchrotron Radiation Research Institute, "The switching field (H) of dot patterns re-annealed at 710 degrees C for 240 min showed a bimodal distribution, where a higher peak was found at 5-6 T, and a lower peak was found at similar to 2 T. It was revealed by cross-sectional TOM analysis that the structure of dots in the pattern can be classified into two groups. One group has a high degree of order with well-defined 100 11 crystalline growth, and the other group includes structurally-disturbed dots like [1 1 11 growth and twin crystals."

According to the news editors, the research concluded: "This structural inhomogeneity causes the magnetic switching field distribution observed."

For more information on this research see: Switching field distribution and magnetization reversal process of FePt dot patterns. Journal of Magnetism and Magnetic Materials, 2014;360():205-210. Journal of Magnetism and Magnetic Materials can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Journal of Magnetism and Magnetic Materials - www.elsevier.com/wps/product/cws_home/505704)

The news editors report that additional information may be obtained by contacting S. Ishio, Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan. Additional authors for this research include S. Takahashi, T. Hasegawa, A. Arakawa, H. Sasaki, Z. Yan, X. Liu, Y. Kondo, H. Yamane, J. Ariake, M. Suzuki, N. Kawamura and M. Mizumaki.

Keywords for this news article include: Asia, Hyogo, Japan, Magnetics

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Source: Journal of Technology