Stripe domains in Permalloy films as observed by ferromagnetic resonance and magnetic force microscopy

Ramos, C.A.; Brigneti, E. Vassallo; Gómez, J.; Butera, A.

doi:10.1016/j.physb.2009.06.090

Cited by 23 publications

(19 citation statements)

References 3 publications

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“…Moreover, we cannot exclude that this behavior could be thickness dependent and related to the existence of a stripe domain structure. 26 For angles other than 90°, in the range between 83°and 97°, the observed MR curves show a positive parabolic behavior, similar to the results reported in the above cited works. In the case of antidots array sample the MR response, shown in Fig.…”

Section: Resultssupporting

confidence: 88%

Magnetic and transport properties in ordered arrays of permalloy antidots and thin films

Confalonieri

Pirota

Vázquez

et al. 2010

Journal of Applied Physics

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The magnetotransport behaviors of two types of permalloy nanostructures, thin films and antidots, are presented and discussed. Antidots samples were prepared by sputtering a Ni 80 Fe 20 layer on top of a nanoporous alumina membrane. A counterpart continuous thin film grown on a continuous Si substrate was also prepared. The magnetoresistance ͑MR͒ was measured both as a function of the external applied magnetic field and of the angular orientation, and thus compared with the magnetization curves. The introduction of antidots is found to reduce the anisotropic MR and the angular dependence of the MR, simultaneously increasing the coercive field of the samples. The influence of the sample geometry on the perpendicular MR behavior is reported and discussed.

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Section: Resultssupporting

confidence: 88%

Magnetic and transport properties in ordered arrays of permalloy antidots and thin films

Confalonieri

Pirota

Vázquez

et al. 2010

Journal of Applied Physics

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“…Although measurements were performed considering wider magnetic field ranges, no evidence of further resonance modes is observed. In particular, this behavior with a single FMR mode is expected for single systems with homogeneous inplane magnetization configuration, as observed in most films with in-plane uniaxial anisotropy and polycrystalline structure [13,36,46,54,55].…”

Section: Dynamic Magnetic Responsementioning

confidence: 56%

Thickness dependence of the magnetic anisotropy and dynamic magnetic response of ferromagnetic NiFe films

Silva

Corrêa

Pace

et al. 2017

J. Phys. D: Appl. Phys.

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We investigate the thickness dependence of the magnetic anisotropy and dynamic magnetic response of ferromagnetic NiFe films. We go beyond quasi-static measurements and focus on the dynamic magnetic response by considering three complementary techniques: the ferromagnetic resonance, magnetoimpedance and magnetic permeability measurements. We verify remarkable modifications in the magnetic anisotropy, i.e. the well-known behavior of in-plane uniaxial magnetic anisotropy systems gives place to a complex magnetic behavior as the thickness increases, and splits the films in two groups according to the magnetic properties. We identify magnetoimpedance and magnetic permeability curves with multiple resonance peaks, as well as the evolution of the ferromagnetic resonance absorption spectra, as fingerprints of strong changes of the magnetic properties associated to the vanishing of the in-plane magnetic anisotropy and to the emergence of non-homogeneous magnetization configuration, local anisotropies and out-of-plane anisotropy contribution arisen as a consequence of the non-uniformities of the stress stored in the film as the thickness is increased and/or to the columnar growth of the film. We interpret the experimental results in terms of the structural and morphological properties, quasi-static magnetic behavior, magnetic domain structure and different mechanisms governing the magnetization dynamics at distinct frequency ranges.

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“…For Q < 1 the critical thickness above which the stripe structure is observed increases rapidly when Q decreases, [13][14][15][16][17] while for Q ≥ 1 the magnetization vectors are perpendicular to the film surface and a stripe (or bubble) domain pattern is expected for all film thicknesses. Different films exhibiting this domain configuration are known, and have been characterized both experimentally [5,[18][19][20][21][22][23] and theoretically [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Tunable stress induced magnetic domain configuration in FePt thin films

Álvarez¹,

Montalbetti²,

Gómez³

et al. 2015

J. Phys. D: Appl. Phys.

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We present a study of the magnetic properties of chemically disordered ferromagnetic FePt films of 100 nm thickness that have been grown by sputtering with different Ar pressures (3 mTorr ≤ P Ar ≤ 13 mTorr). We found that the residual stress can be controlled by the sputtering pressure, which in turn allows to tune the perpendicular magnetic anisotropy due to magnetoelastic effects.Films deposited at lower Ar pressures display an in-plane compressive stress that favors an out of plane component of the magnetization and the formation of a magnetic domain structure in the form of stripes. For higher pressures the stress is relaxed and the magnetic configuration changes to planar domains. These results show the possibility to accurately tune the initial magnetic state in films with potential applications in magnetoelectrically coupled devices.

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Stripe domains in Permalloy films as observed by ferromagnetic resonance and magnetic force microscopy

Cited by 23 publications

References 3 publications

Magnetic and transport properties in ordered arrays of permalloy antidots and thin films

Magnetic and transport properties in ordered arrays of permalloy antidots and thin films

Thickness dependence of the magnetic anisotropy and dynamic magnetic response of ferromagnetic NiFe films

Tunable stress induced magnetic domain configuration in FePt thin films

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