A. Kumari, S. Sarkar, J. Pulecio, D. Karunaratne and S. Bhanja,"Study of Magnetization State Transistion in Closely-Spaced Nanomagnet 2D Array for Comuptaion", Accepted in Journal of Applied Physics, 2011.
Abstract:
The work investigated the dipole-dipole interaction for nite 2D arrays of ferromag-
netic circular nanomagnet. Starting with two basic arrangements of coupled nanomagnets namely, longitudinal and transverse, different diameter and thickness are studied. The phase plot results exhibit that for longitudinal arrangements the single domain state is pervasive over a large range of thickness values as compared to the transverse arrangement or isolated nanomagnet cases. The study is further extended to finite arrays (3 x 3 and 5 x 5) of circular nanomagnets. The magnetic force microscopy (MFM) results show that arrays of nanomagnets favors anti-ferromagnetic ordering at remanence. We have correlated our experimental results with micro-magnetic simulations. Based on our study, we can conclude that nanomagnets with 100 nm diameter, 15 nm thickness and 20 nm spacing has single domain state in an array configuration with one-step switching, which results in fast operation, a property ideal for computing.
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