Study of the magnetic interface and its effect in Fe/NiFe bilayers of alternating order
Sagarika Nayak,Sudhansu Sekhar Das,Braj Bhusan Singh,Timothy Charlton,Christy J. Kinane,Subhankar Bedanta +5 more
TLDR
In this article, the authors present a comprehensive study on the magnetization reversal in the Fe/NiFe bilayer system by alternating the order of the magnetic layers, showing that the magnetic parameters such as coercivity HC, and anisotropy field HK become almost doubled when a NiFe layer is grown over the Fe layers.Abstract:
We present a comprehensive study on the magnetization reversal in the Fe/NiFe bilayer system by alternating the order of the magnetic layers. All the samples show growth-induced uniaxial magnetic anisotropy due to the oblique angle deposition technique. Strong interfacial exchange coupling between the Fe and NiFe layers leads to single-phase hysteresis loops in the bilayer system. The strength of coupling being dependent on the interface changes upon alternating the order of magnetic layers. The magnetic parameters such as coercivity HC, and anisotropy field HK become almost doubled when a NiFe layer is grown over the Fe layers. This enhancement in the magnetic parameters is primarily dependent on the increase of the thickness and magnetic moment of the Fe–NiFe interfacial layer as revealed from the polarized neutron reflectivity (PNR) data of the bilayer samples. The difference in the thickness and magnetization of the Fe–NiFe interfacial layer indicates the modification of the microstructure by alternating the order of the magnetic layers of the bilayers. The interfacial magnetic moment increased by almost 18% when the NiFe layer was grown over the Fe layer. In spite of the different values of anisotropy fields and modified interfacial exchange coupling, the Gilbert damping constant values of the ferromagnetic bilayers remain similar to the single NiFe layer.read more
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Journal Article
Ferromagnetic resonance linewidth in metallic thin films: Comparison of measurement methods | NIST
Sangita S. Kalarickal,Pavol Krivosik,Mingzhong Wu,Carl E. Patton,Michael Schneider,Pavel Kabos,Thomas J. Silva,John P. Nibarger +7 more
TL;DR: In this article, the linewidth of a series of Permalloy films with thicknesses of 50 and 100nm was measured using linear function of frequency, with a slope that corresponds to a nominal Landau-Lifshitz phenomenological damping parameter α value of 0.007 and zero frequency intercepts in the 160-320A∕m (2-4Oe) range.
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The origin of intrinsic Gilbert damping
TL;DR: The damping of magnetization, represented by the rate at which it relaxes to equilibrium, is successfully modeled as a phenomenological extension in the Landau-Lifschitz-Gilbert equation by a nonrelativistic expansion of the Dirac equation.
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Magnetic, optical and electrical properties of permalloy films by DC magnetron sputtering
Min Zhang,Chaoyong Deng +1 more
TL;DR: In this article, the microstructure, electrical, magnetic and optical properties of NiFe thin films were characterized using XRD, EDS, AFM, PPMS, Hall effect Test Station, UV-Vis spectrometer, and spectroscopic ellipsometer.
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Interface-driven static and dynamic magnetic properties of ultrathin Fe/Ge multilayers
Surendra Singh,Surendra Singh,Harsh Bhatt,Harsh Bhatt,Yogesh Kumar,C. L. Prajapat,C. L. Prajapat,Ajaya Mishra,Subhankar Bedanta,Saibal Basu,Saibal Basu +10 more
TL;DR: In this paper, the formation of a crystalline alloy phase (Fe3Ge) at the interfaces on growing ultrathin Fe/Ge multilayers at an elevated substrate temperature of −∼ −523 K was reported.
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Ferrimagnet GdFeCo Characterization for Spin‐Orbitronics: Large Field‐Like and Damping‐Like Torques
Heloïse Damas,A. Anadón,D. Cespedes-Berrocal,Junior Alegre-Saenz,Jean-Loïs Bello,Aldo Arriola-Córdova,S. Migot,Jaafar Ghanbaja,O. Copie,Michel Hehn,Vincent Cros,Sébastien Petit-Watelot,Juan-Carlos Rojas-Sánchez +12 more
TL;DR: In this paper , a study of the generation of spin current by GdFeCo/Cu/NiFe trilayer where the FeCo sublattice magnetization is dominant at room temperature is presented.
References
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Journal Article
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Journal ArticleDOI
Ferromagnetic resonance linewidth in metallic thin films: Comparison of measurement methods
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TL;DR: In this paper, the linewidth of a series of Permalloy films with thicknesses of 50 and 100nm was measured using linear function of frequency, with a slope that corresponds to a nominal Landau-Lifshitz phenomenological damping parameter α value of 0.007 and zero frequency intercepts in the 160-320A∕m (2-4Oe) range.
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