Journal ArticleDOI
Top-down control of dynamic anisotropy in permalloy thin films with stripe domains
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TLDR
In this paper, the authors used a vector network analyzer ferromagnetic resonance (VNA-FMR) technique to measure the anisotropy variation of permalloy films.Abstract:
Permalloy films with different thickness were prepared for comparison, and the dynamic properties of the stripe domains were investigated by using a vector network analyzer ferromagnetic resonance (VNA-FMR) technique. A top-down approach was used to control the thickness of the films. In the measurement of permeability spectra, an applied magnetic field H app was employed parallel and perpendicular to the stripe domains, respectively. Dynamic pseudo-uniaxial anisotropy fields are derived. In order to explain the anisotropy variation of permalloy films, a theoretical model has been proposed, and the result shows that the pseudo-uniaxial anisotropy can be attributed to the contributions of saturation magnetization, exchange interaction, perpendicular anisotropy, and film thickness. In addition, with the increase of H app, the stripe domains gradually rotate towards the direction of the applied field, which can be clearly observed by magnetic force microscopy. Moreover, the dynamic permeability spectra exhibit a rhythmic variation dependent on the rotation of the stripe domains, i.e. the relationship between the rotational stripe domains and resonance frequency.read more
Citations
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Journal ArticleDOI
Thick Permalloy films for the imaging of spin texture dynamics in perpendicularly magnetized systems
Simone Finizio,Sebastian Wintz,Sebastian Wintz,David Bracher,Eugenie Kirk,Eugenie Kirk,Anna Semisalova,Johannes Förster,Katharina Zeissler,Teresa Weßels,Markus Weigand,Kilian Lenz,Armin Kleibert,Jörg Raabe +13 more
TL;DR: In this paper, the authors demonstrate that permalloy films exhibiting a weak growth-induced perpendicular magnetic anisotropy can be employed as an ideal test system for the investigation of gyration dynamics in topologically trivial and nontrivial magnetic states ranging from an isolated magnetic skyrmion to more complex spin configurations.
Journal ArticleDOI
Tunable ferromagnetic resonance in coupled trilayers with crossed in-plane and perpendicular magnetic anisotropies
Daniel Markó,F. Valdés-Bango,Carlos Quirós,Carlos Quirós,Aurelio Hierro-Rodriguez,María Vélez,María Vélez,José Ignacio Martín,José Ignacio Martín,J. M. Alameda,J. M. Alameda,David S. Schmool,L. M. Álvarez-Prado,L. M. Álvarez-Prado +13 more
TL;DR: In this article, an approach to tune the ferromagnetic resonance frequency of a soft magnetic Ni80Fe20 (Permalloy = Py) film with in-plane magnetic anisotropy (IMA) based on the controlled coupling to a hard magnetic NdCox film with perpendicular magnetic Anisotropic (PMA) through a nonmagnetic Al spacer is studied.
Journal ArticleDOI
Stripe domains reorientation in ferromagnetic films with perpendicular magnetic anisotropy
Louis-Charles Garnier,Massimiliano Marangolo,Mahmoud Eddrief,Diego Bisero,Samuele Fin,Francesca Casoli,Maria Gloria Pini,Angelo Rettori,Silvia Tacchi +8 more
TL;DR: In this article, the authors performed both an experimental and theoretical investigation of a peculiar phenomenon shown by weak stripe domains: namely, the stripe domains reorientation when a dc magnetic field is applied in the film plane along the direction perpendicular to the stripes axis.
Journal ArticleDOI
Rotatable magnetic anisotropy in Fe78Si9B13 thin films displaying stripe domains
TL;DR: In this paper, a linear relationship between the perpendicular anisotropy and the threshold field is found, which is attributed to the portions of the samples whose magnetisation must flip its perpendicular component during a rotation process.
Journal ArticleDOI
Tuning the ferromagnetic resonance frequency of soft magnetic film by patterned permalloy micro-stripes with stripe-domain
Lining Pan,Hongkang Xie,Xiaohong Cheng,Chenbo Zhao,Hongmei Feng,Derang Cao,Jianbo Wang,Qingfang Liu +7 more
TL;DR: The periodic micro-stripes arrays with stripe domains structures upon continuous permalloy (Py) film were fabricated by sputtering, photolithography and ion beam etching technology as discussed by the authors.
References
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Journal Article
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TL;DR: The theory of ferromagnetic resonance absorption was extended in this paper to include the effect of the shape of the specimen and, in the case of a single crystal, of crystal orientation.
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TL;DR: The theory of ferromagnetic resonance absorption was extended in this paper to include the effect of the shape of the specimen and, in the case of a single crystal, of crystal orientation.
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Magneto-dielectrics in electromagnetics: concept and applications
TL;DR: In this paper, a woodpile EBG made up of magneto-dielectric material is proposed for the design of novel EM structures with applications in the VHF-UHF bands.
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A New Type of Magnetic Domain Structure in Negative Magnetostriction Ni-Fe Films
TL;DR: In this paper, B-H loops and magnetoresistance effect revealed that the magnetization in each domain points in one sense and deflects from the plane of the film upwards and downwards alternately.
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Thickness-dependent magnetic excitations in Permalloy films with nonuniform magnetization
TL;DR: In this paper, the static and dynamic properties of Permalloy films with thickness varying from 200 nm to 920 nm have been investigated in detail, and the critical thickness for stripe domain nucleation has been determined using magnetic force microscopy imaging and inplane hysteresis loop measurements.