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Magnetic order in quasicrystals: principles for understanding and control
What is it about?
Quasicrystals have ordered atomic patterns that never repeat periodically. Long-range ferromagnetic and antiferromagnetic order has now been established in quasicrystals, which were long considered unfavorable for such ordering. This review explains recent breakthroughs in understanding magnetism in quasicrystals and related compounds, offering practical principles for tuning their magnetic behavior and guiding the discovery of new magnetic states.
Why is it important?
For decades, magnetic quasicrystals studied experimentally exhibited predominantly spin-glass-like freezing rather than long-range magnetic order. Recent discoveries of ferromagnetic and antiferromagnetic order have demonstrated that quasiperiodicity is compatible with collective magnetic ordering. This review connects these breakthroughs with design principles developed through studies of periodic approximants. It provides a framework for exploring new magnetic materials and identifying how local atomic geometry, magnetic interactions and quasiperiodic organization influence their behaviour.