Journal ArticleDOI
Internal magnetostatic potentials of magnetization-graded ferromagnetic materials
Chandran Sudakar,R. Naik,G. Lawes,Joseph V. Mantese,Adolph L. Micheli,Gopalan Srinivasan,S. P. Alpay +6 more
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TLDR
In this paper, the internal magnetic field induced by a spatially varying magnetization in a compositionally graded ferromagnet was investigated, with a variation in saturation magnetization of 30emu∕g over a sample thickness of 2.5mm.Abstract:
The authors investigated the internal magnetic field induced by a spatially varying magnetization in a compositionally graded ferromagnet. The authors discuss results on a hexagonal ferrite sample, with a variation in saturation magnetization of 30emu∕g over a sample thickness of 2.5mm. The direct current magnetization shows a small anisotropy depending on the direction of the external magnetic field relative to the grading direction. This contribution from a grading induced magnetic field is more pronounced in alternating current susceptibility measurements. The authors find a shift in magnetic properties corresponding to an internal magnetic field of 30Oe, which is significantly lower than the predicted value of approximately 1900Oe. The authors discuss reasons for this discrepancy.read more
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Flexural deformation in a compositionally stepped ferrite and magnetoelectric effects in a composite with piezoelectrics
TL;DR: In this article, the authors investigated the nature of strain mediated magnetoelectric coupling in laminates of lead zirconate titanate (PZT) and compositionally stepped ferrite with grading of piezomagnetic coefficient.
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Self-biased magnetoelectric response in three-phase laminates
TL;DR: In this article, the experimental observation and analysis of self-biased magnetoelectric (ME) effect in three-phase laminates was reported. And the authors showed that the presence of two types of ferromagnetic materials, Ni and NZF, results in built-in magnetic bias due to difference in their magnetic susceptibilities and coercivity.
Journal ArticleDOI
Self-Biased Magnetoelectric Composites: An Overview and Future Perspectives
TL;DR: In this article, the current state-of-the-art of different self-biased structures, their working mechanisms, as well as their main characteristics are summarized and the nature and requirement of the selfbiased magnetoelectric response is discussed with respect to the specific applications.
Journal ArticleDOI
Enhancement of magnetoelectric coupling in functionally graded ferroelectric and ferromagnetic bilayers
TL;DR: In this paper, a model for magnetoelectric (ME) effects in a functionally graded ferroelectric-ferromagnetic bilayer was presented and applied to the specific case of bilayers of nickel zinc ferrite and lead zirconate titanate with the grading axis perpendicular to the sample plane.
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Grading the magnetic anisotropy and engineering the domain wall dynamics in Fe-rich microwires by stress-annealing
Valentina Zhukova,J.M. Blanco,Paula Corte-Leon,M. Ipatov,Margarita Churyukanova,Sergey Taskaev,Arcady Zhukov,Arcady Zhukov +7 more
TL;DR: In this paper, the magnetic properties and domain wall dynamics in Fe-rich microwires subjected to stress-annealing were studied and a drastic decrease in coercivity and change in the character of hysteresis loops from rectangular to linear was obtained.
References
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Classical Electrodynamics (2nd edn)
TL;DR: The present edition of this now classic text offers substantial refinements and improvements over the first edition and includes some new material as mentioned in this paper, including an improved derivation of the macroscopic equations, monopoles, causality and dispersion relations, signal propagation in a dispersive media.
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Fundamentals of graded ferroic materials and devices
TL;DR: In this paper, a generalized Landau-Ginzburg model is constructed and used to develop a methodology for analyzing graded ferroic materials, where system inhomogeneities are assumed to arise from compositional, temporatore, or stress gradlents.
Journal ArticleDOI
Magnetization-graded ferromagnets: The magnetic analogs of semiconductor junction elements
Joseph V. Mantese,Adolph L. Micheli,Norman W. Schubring,R. Hayes,Gopalan Srinivasan,S. P. Alpay +5 more
TL;DR: In this article, the internal magnetic field of a nickel-zinc-ferrite system was determined from ferromagnetic resonance microscopy using a spatially dependent free-energy potential.