Simulating collective magnetic dynamics in nanodisk arrays

Bennett, A. J.; Xu, J. M.
April 2003
Applied Physics Letters;4/14/2003, Vol. 82 Issue 15, p2503
Academic Journal
We study the magnetostatic interactions in planar arrays of single domain, magnetic disk nanostructures. We derive equations for the time evolution of magnetization and energy, and use these results to simulate the relaxation of these systems with a Monte-Carlo model. Our model confirms that relaxation of a one-dimensional array into one of its ground states occurs by propagating the inversion site along the line. A two-dimensional honeycomb array enters a metastable state of frustrated spiral domains due to the availability of low-energy configurational states. This model has potential application in the design of magnetic nanostructure systems for data storage and data processing applications.


Related Articles

  • Highly parallel data storage system based on scanning probe arrays. Lutwyche, M. I.; Despont, M.; Drechsler, U.; Du¨rig, U.; Ha¨berle, W.; Rothuizen, H.; Stutz, R.; Widmer, R.; Binnig, G. K.; Vettiger, P. // Applied Physics Letters;11/13/2000, Vol. 77 Issue 20 

    This letter discusses an alternative storage approach to conventional magnetic data storage. The approach uses a 32x32 array of scanning probe microscopes working in parallel to read and write data as small indentations in a polymer storage medium. The results have densities of 100-200...

  • Speeding R&D for Advanced Recording Heads. Tench, Robert; Hachfeld, Edward // R&D Magazine;Dec99, Vol. 41 Issue 13, p53 

    Highlights the research developments on magnetic data storage and magnetic force microscopy. Significance of magnetic force microscopy in the study of magnetic materials; Trend in the magnetic data storage industry.

  • Parallel nanostructuring of GeSbTe film with particle mask. Wang, Z. B.; Hong, M. H.; Luk'yanchuk, B. S.; Huang, S. M.; Wang, Q. F.; Shi, L. P.; Chong, T. C. // Applied Physics A: Materials Science & Processing;2004, Vol. 79 Issue 4-6, p1603 

    Parallel nanostructuring of a GeSbTe film may significantly improve the recording performance in data storage. In this paper, a method that permits direct and massively parallel nanopatterning of the substrate surface by laser irradiation is investigated. Polystyrene spherical particles were...

  • Researchers create memory with one bit per molecule. Czyzewski, Andrew // Engineer (Online Edition);7/19/2012, p5 

    The article focuses on the magnetic memory with one bit per molecule developed by German and Japanese researchers, which features a single magnetic iron atom that protects the information stored within the device. Karlsruhe Institute of Technology professor Wulf Wulfhekel explained that the...

  • Bias-voltage dependence of perpendicular spin-transfer torque in asymmetric MgO-based magnetic tunnel junctions. Oh, Se-Chung; Park, Seung-Young; Manchon, Aurélien; Chshiev, Mairbek; Han, Jae-Ho; Lee, Hyun-Woo; Lee, Jang-Eun; Nam, Kyung-Tae; Jo, Younghun; Kong, Yo-Chan; Dieny, Bernard; Lee, Kyung-Jin // Nature Physics;Dec2009, Vol. 5 Issue 12, p898 

    Spin-transfer torque (STT) allows the electrical control of magnetic states in nanostructures. The STT in magnetic tunnel junctions (MTJs) is of particular importance owing to its potential for device applications. It has been demonstrated that the MTJ has a sizable perpendicular STT (,...

  • Towards sub-200nm nano-structuring of linear giant magneto-resistive spin valves by a direct focused ion beam milling process. Riedmüller, Benjamin; Huber, Felix; Herr, Ulrich // Journal of Applied Physics;2014, Vol. 115 Issue 6, p1 

    In this work, we present a detailed investigation of a focused ion beam (FIB) assisted nano-structuring process for giant magneto-resistive (GMR) spin valve sensors. We have performed a quantitative study of the dependence of the GMR ratio as well as the sensor resistance on the ion dose, which...

  • Spin-transfer-induced precessional magnetization reversal. Kent, A.D.; Özyilmaz, B.; del Barco, E. // Applied Physics Letters;5/10/2004, Vol. 84 Issue 19, p3897 

    A magnetoelectronic device is proposed in which a spin-current pulse produces a rapid reversal of the magnetization of a thin film nanomagnet. A spin-transfer torque induces the reversal and the switching speed is determined by the precession frequency of the magnetization in a thin film...

  • Domain wall assisted magnetic recording (invited). Dobin, A. Yu.; Richter, H. J. // Journal of Applied Physics;5/1/2007, Vol. 101 Issue 9, p09K108 

    The domain wall assisted switching in the hard/soft composite nanostructures is studied using numerical and analytic micromagnetics. The switching occurs via domain wall nucleation, compression in the applied field, depinning, and propagation through the hard/soft interface. Optimizing hard and...

  • Systematic investigation of Permalloy nanostructures for magnetologic applications. Engel-Herbert, R.; Haque, S. A.; Hesjedal, T. // Journal of Applied Physics;5/1/2007, Vol. 101 Issue 9, p09F503 

    Magnetic logic gates based on magnetostatically coupled ferromagnetic structures show a great promise for future information processing. The absolute size and shape of the elementary structures determine their intrinsic and interaction properties and thus have to be chosen appropriately in order...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics