![]() Prior explorations of magnetic correlations were around the pervasively observed spin glass–like freezing behavior ( 18– 20), until the recent report of long-range magnetic order in an icosahedral quasicrystal ( 21). Since their initial experimental description ( 15), quasicrystals have been the subject of hundreds of studies. Two-dimensional quasicrystals include the tiles proposed by Penrose ( 17), a set of discrete and countably infinite number of nodes in locally similar structures. Considered as a result of projections of higher-dimensional lattices, these mathematical objects find their incarnation on various materials, from Al-Mn alloys ( 15) to byproducts of nuclear device detonation ( 16). An approach based on the interplay between an aperiodic topology, magnetic strength, and external fields is proposed here to harness energy barriers and temperature-induced stochastic magnetization dynamics, which may pave the way to a better control of spin textures while offering the prospect of encoding more than one bit of information in a single object.Ī quasicrystal exhibits defined diffraction patterns but symmetries forbidden in periodic crystals. Maximizing the energy barriers separating equilibrium states is a usual approach to circumvent the detrimental effect of random deviations of magnetization from its average value. This could help to mitigate the effects of supermagnetism ( 12– 14), which occurs when thermal fluctuations cause a spontaneous reversal of magnetization in small-volume components. Therefore, multiple magnetic states are expected to exist in a quasicrystal depending on the local magnetization at a specific vertex ( 11). Aperiodic lattices such as quasicrystals ( 9, 10) have a rich node connectivity that may vary greatly from one vertex to the next, resulting in spatial variations of the local energy density. This research demonstrates that introducing structural aperiodicity in magnetic devices that exploit spin degeneracy in a single, richly intraconnected finite object can enable the engineering of quantum states in both the effective low-temperature and thermally excited regimes.Īn interesting yet unanswered question is whether such an effect can be achieved with magnetic units arranged in an aperiodic fashion so that magnetic phases able to evolve in regimes crucial to magnetic switching applications can be created. ![]() Static spin structure factors reveal ferromagnetic and ferrimagnetic modulations that are compatible with a variety of spin textures. In our experiments, we observe some spins dynamically activate, while others remain static, all within an average magnetization space defined by competing structural and magnetic degrees of freedom. By embedding a qubit magnetic Penrose quasicrystal into a quantum annealer, we were able to reproduce the formation of magnetic phases driven by specific physical parameter selections, allowing us to distinguish a wide range of frustrated magnetic configurations at the single-spin scale. Unveiling the fundamental dynamics of naturally or artificially formed magnetic quasicrystals in the presence of an external magnetic field remains a difficult problem that may have implications for the design of information processing devices.
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