Publication
IEEE Transactions on Magnetics
Paper

Size Effects of Switching Fields of Thin Permalloy Particles

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Abstract

Measurements of hysteresis loops were performed on thin permalloy rectangular platelets with various dimensions prepared by nanolithography. The particle coerclvlty, Hc, exhibits a sensitive size dependence. The measured Hc are compared with micromagnetic predictions utilizing two-dimensional models without magnetization variation through the thickness. Excellent overall agreement is found, indicating that a simplified two-dimensional approach is sufficient for characterizing reversal mechanisms for particles with thicknesses smaller than or comparable to the exchange length. © 1992 IEEE

Date

01 Jan 1992

Publication

IEEE Transactions on Magnetics

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