Systemic inefficiencies in soft magnetic materials drive energy loss in EV motors: A cross-disciplinary analysis of hysteresis, thermal demagnetization, and material science bottlenecks

Indigenous material sciences, such as the Nok culture’s iron-smelting techniques or the Aboriginal fire management systems, demonstrate low-hysteresis material behaviors and thermal resilience through empirical, non-extractive practices. These traditions frame material efficiency as part of a holistic ecosystem, contrasting with the linear, extractive paradigms of modern material science. However, their contributions are systematically excluded from patented innovations, reinforcing colonial knowledge hierarchies.

The development of soft magnetic materials is deeply tied to 20th-century militarization, particularly the WWII demand for radar components and Cold War investments in rare earth research, which established today’s supply chain monopolies. The hysteresis problem itself was formalized in the 1880s by James Alfred Ewing, but its modern manifestations reflect the thermodynamic limits of silicon steel and neodymium-iron-boron alloys, materials whose extraction and processing have geopolitical and environmental costs. Historical precedents in material science show that breakthroughs often emerge from crisis (e.g., the 1970s oil shocks) rather than incremental R&D.

Cross-culturally, material efficiency is often framed as a communal or spiritual practice, as seen in Japanese *monozukuri* or African ironworking traditions, where durability and minimal waste are cultural values. In contrast, Western material science prioritizes individual innovation and proprietary control, leading to fragmented solutions. The African concept of *ubuntu*—'I am because we are'—could inspire collaborative material design processes that integrate local knowledge and reduce global supply chain dependencies.

Scientifically, magnetic hysteresis and thermal demagnetization are well-documented phenomena governed by domain wall motion, pinning sites, and thermal activation energies, with losses quantified via the Steinmetz equation. Recent advances in amorphous and nanocrystalline alloys (e.g., Finemet, Nanoperm) demonstrate 30–50% reduction in hysteresis loss compared to traditional silicon steel, but scaling these materials for EV motors remains constrained by cost and manufacturability. The scientific consensus also highlights the need for multi-physics modeling (electromagnetic-thermal-mechanical coupling) to predict long-term performance under real-world conditions.

Artistically, the 'maze-like' magnetic patterns evoke fractal geometries found in nature, such as river deltas or neural networks, suggesting a deeper aesthetic and functional harmony in material structures. Spiritually, many cultures view magnetism as a life force—e.g., the Chinese *qi* or the African concept of *ashe*—which could reframe material inefficiencies as disruptions in energetic balance. Creative approaches, such as generative design algorithms inspired by biological structures, offer alternative pathways to optimize motor cores without relying on rare earth metals.

Future modeling must account for the thermodynamic ceiling of current soft magnetic materials, which are approaching their theoretical efficiency limits (~98% for hysteresis loss). Scenario planning should explore decentralized material innovation hubs, where local labs and indigenous knowledge systems co-develop solutions, reducing reliance on global supply chains. Additionally, the integration of AI-driven material discovery (e.g., generative design, high-throughput experimentation) could accelerate breakthroughs but risks exacerbating power asymmetries if controlled by corporate entities.

Marginalized voices—such as artisanal miners in the DRC, factory workers in China’s rare earth processing plants, or Indigenous communities near mining sites—are systematically excluded from material science narratives, despite bearing the brunt of its externalities. Their exclusion is structural: academic journals, patent offices, and industry conferences prioritize Western-trained engineers and corporate R&D. Amplifying these voices could reveal alternative metrics for material 'efficiency,' such as labor conditions, ecological footprint, or cultural significance, which are absent in mainstream analyses.