Pentagon bets big on rare-earth-free magnets to counter China

Iron nitride magnets, particularly those developed by Niron Magnetics based on the α″-Fe₁₆N₂ crystal structure, offer a breakthrough in magnetic performance with a theoretical saturation magnetization of approximately 2.4 Tesla—about 50% higher than the best neodymium-iron-boron magnets. However, a significant technical hurdle remains the thermal instability of this phase, which decomposes above roughly 250°C, limiting these magnets to applications operating below 200°C and excluding some of the most thermally demanding defense uses.

The supply chain advantages of iron nitride magnets are profound, as they rely on abundant, globally available materials like iron ore and atmospheric nitrogen, sidestepping the geopolitical risks tied to rare earth elements, over 90% of which are produced in China. This rare-earth-free composition not only mitigates supply vulnerabilities but also leverages well-established industrial supply chains, such as the steel and ammonia sectors, enabling scalable domestic production in the U.S. and Europe.

Despite their promise, scaling iron nitride magnet manufacturing remains an active engineering challenge, with independent analyses projecting a 3 to 7-year horizon before full deployment in electric vehicle traction motors due to ongoing issues with phase stability, coercivity, and production scalability. Niron Magnetics is addressing these challenges through a vertically integrated approach, operating a small-scale facility in Minneapolis and constructing a 287,000-square-foot plant in Sartell, Minnesota, targeting 1,500 metric tons of annual production by early 2027, which could serve as a replicable model for global expansion.

Iron nitride magnets represent the first new commercially impactful magnetic material in over 40 years, unlocking fresh possibilities for electric motor and generator design that could disrupt the traditional rare earth magnet market. While governments continue to subsidize and protect legacy rare earth supply chains, companies like Niron Magnetics are pioneering a strategic shift to bypass complex and geopolitically fraught rare earth refining bottlenecks, signaling a transformative moment in critical mineral supply chain independence.

The Pentagon’s $150 million investment in Niron Magnetics is a strategic component of a broader $3 billion federal initiative launched under President Trump to sever the United States’ reliance on China’s rare earth supply chain, which is viewed as a critical vulnerability in national defense. China’s dominance in processing and refining rare earth elements—controlling nearly 90% of global refining capacity—has long posed a geopolitical risk, as these materials are essential for advanced weaponry, guidance systems, and military electronics. By investing in iron nitride magnets that bypass rare earth elements altogether, the U.S. aims to neutralize China’s leverage over defense supply chains, especially as Beijing’s suspension of expanded export controls is set to expire in November 2026, potentially reinstating restrictive licensing regimes that could choke off U.S. access to critical minerals.

This investment also reflects a broader geopolitical strategy to reshape the critical minerals supply chain through a combination of financial incentives and stringent procurement policies. Executive orders signed by Trump restrict defense contractors from sourcing materials from adversary nations like China, Russia, North Korea, and Iran without approved transition plans by 2027, thereby making foreign dependence increasingly difficult and domestic production more economically attractive. As Jason Weiss of Moog emphasizes, proactively addressing these supply chain vulnerabilities is essential not only for safeguarding operational readiness but also for reinforcing national security and technological innovation in an era of intensifying U.S.-China strategic competition.

Despite robust funding and policy support, the U.S. faces significant challenges in building a fully independent rare earth supply chain, given China’s decades-long investments in refining technology, engineering expertise, and comparatively lax environmental regulations. The U.S. must overcome gaps in mining, refining, and educational infrastructure, as well as potential restrictions on Chinese machinery exports critical to processing rare earths. This complex and lengthy endeavor underscores why the Pentagon’s bet on iron nitride magnets is not only a technological gamble but a geopolitical imperative to circumvent entrenched Chinese dominance and secure critical mineral independence.

The urgency of this strategic pivot is further underscored by China’s recent export restrictions on key minerals like antimony, which the U.S. imports entirely from China and which are vital to over 300 American military weapon systems. Such moves starkly reveal the fragility of U.S. defense supply chains and amplify the geopolitical motivations driving federal investments like the $150 million Pentagon commitment to Niron Magnetics. By developing rare-earth-free magnet technologies, the U.S. seeks to mitigate these vulnerabilities and reduce its exposure to China’s export controls, thereby strengthening national security in a rapidly evolving global mineral landscape.

The Pentagon’s $150 million investment in Niron Magnetics is a critical component of a broader $3 billion federal initiative launched under the Trump administration to fortify domestic critical mineral production and processing capabilities. This comprehensive strategy goes beyond mere mining to emphasize refining, processing, and manufacturing capacity essential for converting raw materials into defense-grade components, addressing a long-standing industrial gap that has left the U.S. dependent on foreign sources, particularly China. As articulated by the Department of Energy’s multi-stage funding programs, this sustained institutional commitment signals a shift from one-time political allocations to a methodical rebuilding of supply chain sovereignty, underscoring national security and industrial policy priorities.

To accelerate the transition away from Chinese dominance in rare earths and related minerals, the federal government has paired substantial financial investments with stringent procurement policies. Executive orders signed by President Trump restrict defense contractors’ use of materials sourced from adversary nations like China, Russia, and Iran, effectively phasing out Chinese-origin rare earth magnets by January 2027 unless contractors demonstrate approved transition plans. This regulatory deadline creates a powerful economic incentive for domestic production and allied sourcing, reshaping supplier qualification processes and compelling manufacturers to pivot rapidly toward U.S.-based or allied supply chains.

Despite the influx of billions in funding—including $18.6 billion invested by early 2026 and targeted grants supporting mining education and workforce development—the U.S. faces significant challenges scaling critical mineral supply chains to match China’s cost and volume advantages. Environmental regulations, technical complexity, and a decades-long erosion of domestic refining capacity mean that building mines and processing plants can take years, creating a temporal mismatch with urgent defense needs. Consequently, the government’s dual approach of financial incentives combined with procurement restrictions aims to bridge this gap while fostering a resilient industrial base capable of sustained production.

Recognizing that true supply chain independence requires more than domestic production, the U.S. is actively forging multilateral partnerships with allied nations such as Japan, Mexico, and the European Union to establish trade agreements and price floors for critical minerals. This multilateral strategy complements domestic investments by diversifying sources and stabilizing market dynamics, reflecting a long-term vision of resilient, diversified supply chains that reduce vulnerability to geopolitical disruptions. As Jon Hykawy of Stormcrow Capital notes, achieving rare earth independence will demand continued investment both at home and abroad, underscoring the complexity of disentangling from China’s entrenched mineral monopoly.