Why Rare Earth-Free Magnets Are a Strategic Priority in 2026

Supply chain vulnerabilities in rare earth elements are the central driver pushing researchers, manufacturers, and policymakers toward rare earth-free permanent magnet alternatives. The global permanent magnet market has long depended on neodymium-iron-boron (NdFeB) and samarium-cobalt (SmCo) formulations — materials whose production is geographically concentrated and subject to significant export policy risk. As documented by WIPO in its annual technology trends reporting, critical material dependencies have become a defining innovation challenge for energy transition technologies.

The strategic urgency is compounded by decarbonization policy mandates across the European Union, the United States, and major Asian economies, all of which are accelerating the deployment of electric vehicles and offshore wind capacity — both of which rely heavily on high-performance permanent magnets. Reducing dependence on rare earth supply chains is no longer a purely academic question; it is a procurement, security, and industrial policy imperative.

Standards bodies including IEC and research funders such as the U.S. Department of Energy have explicitly identified rare earth-free magnet materials as a priority research area, with dedicated funding programmes targeting both MnBi and Fe₁₆N₂ systems. This institutional momentum is translating into accelerating patent filings and academic publications across these material families.

MnBi and Fe₁₆N₂: The Two Leading Candidate Systems

MnBi and Fe₁₆N₂ are the two most strategically significant rare earth-free permanent magnet candidate systems under active investigation in 2026. Each system offers a distinct combination of magnetic properties, synthesis challenges, and application fit — and each has attracted a distinct research and patent community.

MnBi (Manganese Bismuth)

MnBi is a binary intermetallic compound that exhibits ferromagnetic ordering and a positive temperature coefficient of coercivity — a property that makes it particularly attractive for high-temperature motor applications where conventional NdFeB magnets lose performance. The low-temperature phase (LTP) of MnBi is the magnetically relevant polymorph, and its synthesis requires careful control of phase purity to suppress competing non-magnetic phases. Research into MnBi spans synthesis routes including melt-spinning, mechanical alloying, and sintering, with ongoing investigation into dopant strategies to enhance energy product.

Fe₁₆N₂ (Iron Nitride)

Fe₁₆N₂ is an iron nitride phase that has attracted significant research interest due to theoretical predictions of an exceptionally high saturation magnetisation — potentially exceeding that of any known permanent magnet material. The primary challenge for Fe₁₆N₂ is phase stabilisation: the compound is metastable under ambient conditions and decomposes readily during processing. Thin-film and bulk synthesis routes have been explored, including molecular beam epitaxy, ion implantation, and low-temperature nitriding of iron powders. Coercivity enhancement through microstructural control and exchange coupling remains an active area of investigation.

“Fe₁₆N₂ has attracted significant research interest due to theoretical predictions of an exceptionally high saturation magnetisation — potentially exceeding that of any known permanent magnet material.”

Application Domains Driving Innovation Demand for Rare Earth-Free Magnets

Three application domains are the primary drivers of innovation demand for rare earth-free permanent magnets: electric vehicle motors, wind turbines, and defense systems. Each imposes distinct performance requirements that shape the material development agenda for MnBi and Fe₁₆N₂.

Electric Vehicle Motors

EV traction motors require permanent magnets that maintain high coercivity across a wide operating temperature range, resist demagnetisation under high current loading, and can be manufactured at scale without supply chain disruption. The positive temperature coefficient of coercivity exhibited by MnBi makes it a candidate for high-temperature motor operation, while Fe₁₆N₂’s theoretical magnetisation ceiling positions it as a long-term target for torque density improvement.

Wind Turbines

Direct-drive wind turbines use large-diameter permanent magnet generators that require substantial magnet mass per installation. The cost and supply security of rare earth elements directly affects the economics of wind energy deployment. Rare earth-free alternatives that can deliver sufficient energy product at competitive cost would materially reduce the geopolitical risk embedded in wind energy supply chains, as noted by IRENA in its critical materials assessments for the energy transition.

Defense Applications

Defense systems including electric actuation, guidance systems, and directed energy weapons rely on permanent magnets whose supply chains must be domestically controllable. The strategic sensitivity of rare earth dependencies in defense procurement has been explicitly recognised by multiple governments, accelerating investment in rare earth-free magnet programmes.

Navigating the Patent and Literature Research Landscape for MnBi and Fe₁₆N₂

A rigorous innovation landscape analysis for rare earth-free permanent magnets requires structured search strategies across both patent databases and scientific literature. The two source types are complementary: patents reveal commercial intent, assignee strategies, and claim boundaries, while literature captures upstream research trends, synthesis breakthroughs, and performance benchmarks.

Patent Databases

The primary patent databases for this landscape include USPTO, EPO Espacenet, WIPO PatentScope, and Lens.org. Effective search terms for MnBi include “MnBi permanent magnet,” “manganese bismuth magnet,” and “low-temperature phase MnBi.” For Fe₁₆N₂, relevant terms include “Fe16N2 magnet,” “iron nitride magnet,” “alpha-double-prime iron nitride,” and “rare earth free hard magnet.” PatSnap Eureka provides AI-powered landscape analysis across all of these databases, enabling rapid identification of key assignees, filing trends, and white-space opportunities.

Literature Sources

The core literature databases for this topic are IEEE Xplore, Web of Science, and Google Scholar. The most relevant journals include the Journal of Magnetism and Magnetic Materials, Applied Physics Letters, and Acta Materialia. Literature analysis complements patent data by revealing the academic institutions and national research programmes that are feeding the commercial pipeline — a critical signal for forecasting future patent activity.

Building a Rigorous Rare Earth-Free Magnet Innovation Landscape Analysis

A complete innovation landscape analysis for MnBi and Fe₁₆N₂ permanent magnets should be structured around five thematic pillars: material properties benchmarking, processing and synthesis approaches, application domain mapping, competitive assignee landscape, and forward-looking innovation trends. Each pillar requires source-grounded data — patent claim analysis, literature performance data, and assignee filing histories — to support defensible conclusions.

Material Properties Benchmarking

Benchmarking should compare MnBi and Fe₁₆N₂ against incumbent rare earth magnets (NdFeB, SmCo) across the key performance metrics: saturation magnetisation (Ms), coercivity (Hc), remanence (Br), and maximum energy product (BH)max. This provides the quantitative foundation for assessing where rare earth-free candidates are competitive and where performance gaps remain.

Processing and Synthesis Approaches

Synthesis route analysis should map the patent claim landscape for each processing method — melt-spinning, mechanical alloying, sintering, molecular beam epitaxy, and low-temperature nitriding — to identify which approaches are heavily patented and where freedom-to-operate may exist. Literature data provides complementary performance benchmarks for each route.

Competitive Assignee Landscape

Assignee analysis identifies which organisations — universities, national laboratories, and commercial entities — hold the most significant patent positions in MnBi and Fe₁₆N₂. This analysis reveals the competitive structure of the innovation ecosystem and highlights potential licensing, collaboration, or acquisition targets. PatSnap Eureka’s AI-powered assignee clustering tools are designed specifically for this type of landscape intelligence, as described on the PatSnap product page.

Forward-Looking Innovation Trends

Trend analysis should identify the most recent filing cohorts, emerging sub-themes (such as composite magnet architectures or additive manufacturing of MnBi), and citation network patterns that signal where the next breakthrough claims are likely to emerge. This forward-looking layer transforms a static landscape snapshot into an actionable intelligence product for R&D strategy and IP portfolio planning.