Anisotropic magnetic coupling of permalloy micron dots forming a square lattice | Zendy

Chantal Mathieu | Zendy; Claudia Hartmann | Zendy; M. Bauer | Zendy; O. Buettner | Zendy; S. Riedling | Zendy; B.F.P. Roos | Zendy; S. O. Demokritov | Zendy; B. Hillebrands | Zendy; B. Bartenlian | Zendy; C. Chappert | Zendy; D. Decanini | Zendy; F. Rousseaux | Zendy; E. Cambril | Zendy; A. Müller | Zendy; B. Hoffmann | Zendy; Uwe Hartmann | Zendy

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Anisotropic magnetic coupling of permalloy micron dots forming a square lattice

Author(s) -

Chantal Mathieu,

Claudia Hartmann,

M. Bauer,

O. Buettner,

S. Riedling,

B.F.P. Roos,

S. O. Demokritov,

B. Hillebrands,

B. Bartenlian,

C. Chappert,

D. Decanini,

F. Rousseaux,

E. Cambril,

A. Müller,

B. Hoffmann,

Uwe Hartmann

Publication year - 1997

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.119051

Subject(s) - permalloy , condensed matter physics , anisotropy , materials science , magnetic anisotropy , dipole , magnetic field , square lattice , lattice (music) , quantum dot , physics , magnetization , optics , nanotechnology , quantum mechanics , acoustics , ising model

Static magnetic and spin wave properties of square lattices of permalloy micron dots with thicknesses of 500 and 1000 A and with varying dot separations have been investigated. A magnetic fourfold anisotropy was found for the lattice with dot diameters of 1 μm and a dot separation of 0.1 μm. The anisotropy is attributed to an anisotropic dipole–dipole interaction between magnetically unsaturated parts of the dots. The anisotropy strength (order of 105 erg/cm3) decreases with increasing in-plane applied magnetic field.

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