Abstract
Objective: In this brief review, the importance of nanotechnology in developing novel magnetic energy storage materials is discussed.
Method: The discussion covers recent patents on permanent magnetic materials and especially covers processing of permanent magnets (rare-earth and rare-earth free magnets), importance of rare-earth permanent magnets and necessity of rare-earth free permanent magnets. Magnetic energy storage materials are those magnetic materials which exhibit very high energy product (BH)max (where B is the magnetic induction in Gauss (G) whereas H is the applied magnetic field in Oersted (Oe)). (BH)max is the direct measure of the ability of a magnetic material to store energy. Result: In this context, processing of magnetic energy storage composite materials constituted by soft and hard magnetic materials played a predominant role in achieving high (BH)max values due to the exchange coupling phenomenon between the soft and hard magnetic phases within the composite. Magnetic energy storage composites are normally composed of rare-earth magnetic materials as well as rare-earth free magnetic materials. Conclusion: Nanotechnology’s influence on the enhancement of energy product due to the exchange coupling phenomenon is of great prominence and therefore discussed in this review.Keywords: Coercive field, hard magnets, magnetic energy storage, maximum energy product, nanomaterials, permanent magnets, rare-earth free magnets, rare earth magnets.
Graphical Abstract
Call for Papers in Thematic Issues
Advances in Vanadium and Titanium Resources for High-performance Materials via Nanostructuring and Nanoengineering (updated BMS-NANOTEC-2023-HT-31)
Vanadium and titanium-based materials are ideal candidates for structural and functional materials in aerospace, biomedical engineering, optics, catalysis, energy storage and conversion etc. Vanadium/titanium-based alloys, compounds and materials have a large family with different chemical compositions, dimensions, structures/morphologies, and chemical/physical/mechanical properties, which provides huge opportunities for the development of emerging ...read more
Green Nanotechnology and Nanomaterials for a Sustainable Environment
Green nanotechnology (GN) might wind up being the most efficient platform for achieving the goals of the 2030 Agenda. The goal of GN is to create goods and procedures that are secure, energy-efficient, waste-free, and emit fewer greenhouse gases. Such goods and procedures use renewable resources, and/or their environmental impact ...read more
Nano-coatings and Nanoscale Composites for Hazardous Environments
Automobile, defence, and aerospace sectors need lightweight material for fuel efficiency and lower emissions. Often these materials are added with nanoscale reinforcements or have to be coated with nanomaterials to improve the scratch resistance, self-healing behaviour and corrosion and wear resistance and are all much needed for hazardous environments without ...read more
NANOSTRUCTURED NEUROMORPHIC DEVICES: TOWARDS IN MATERIA COMPUTING
The efforts pursued in the last decade to build up brain-inspired systems with electronic hardware solutions to solve complex data processing tasks, have leaded to the development of a new generation of devices, as memristor crossbar arrays, and their different applications became more and more reliable. One of the basic ...read more
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