Domain structure and magnetization reversal in multilayers consisting of thin permalloy films separated with nonmagnetic interlayers
Using numerical micromagnetic modeling we have investigated the development of domain structure and magnetization reversal in multilayer thin-film structures. The permalloy (Ni80Fe20) magnetic layers had the in-plane uniaxial and perpendicular magnetic anisotropy. We found that as the thickness of nonmagnetic interlayers decreases, the in-plane configuration of magnetic moments transforms from a single domain state to stripe domains, which is caused by the increase of magnetostatic interaction between layers. In structures with “thick” interlayers, even weak magnetostatic interaction enforces neighbor single domain permalloy layers to have opposite orientation of magnetic moments. The saturation field of such samples increases linearly with the number of layers. By analyzing the dynamic characteristics of multilayers, we determined the optimum number of layers ensuring the maximum conversion efficiency of wideband high frequency microstrip magnetometer.
Keywords
micromagnetic modeling,
multilayer magnetic film,
domain structure,
hysteresis loop,
microstrip resonator,
magnetic field sensorAuthors
| Belyaev B.A. | Kirensky Institute of Physics Federal Research Center KSC SB RAS; Siberian Federal University | belyaev@iph.krasn.ru |
| Boev N.M. | Kirensky Institute of Physics Federal Research Center KSC SB RAS; Siberian Federal University | boev@iph.krasn.ru |
| Izotov A.V. | Kirensky Institute of Physics Federal Research Center KSC SB RAS; Siberian Federal University | aizotov@sfu-kras.ru |
| Solovev P.N. | Kirensky Institute of Physics Federal Research Center KSC SB RAS | psolovev@iph.krasn.ru |
Всего: 4
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