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Anisotropic magnetic coupling of permalloy micron dots forming a square lattice

 

作者: C. Mathieu,   C. Hartmann,   M. Bauer,   O. Buettner,   S. Riedling,   B. Roos,   S. O. Demokritov,   B. Hillebrands,   B. Bartenlian,   C. Chappert,   D. Decanini,   F. Rousseaux,   E. Cambril,   A. Mu¨ller,   B. Hoffmann,   U. Hartmann,  

 

期刊: Applied Physics Letters  （AIP Available online 1997）
卷期: Volume 70, issue 21  

页码: 2912-2914

 

ISSN:0003-6951

 

年代: 1997

 

DOI:10.1063/1.119051

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Static magnetic and spin wave properties of square lattices of permalloy micron dots with thicknesses of 500 and 1000 Å and with varying dot separations have been investigated. A magnetic fourfold anisotropy was found for the lattice with dot diameters of 1 &mgr;m and a dot separation of 0.1 &mgr;m. The anisotropy is attributed to an anisotropic dipole–dipole interaction between magnetically unsaturated parts of the dots. The anisotropy strength (order of105 erg/cm3) decreases with increasing in-plane applied magnetic field. ©1997 American Institute of Physics.

 

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