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Figure 8
Selected-area electron diffraction patterns of the annealed Au57.5Cu5.5Al10.5In12Tb14.5 iQC taken along the (a) fivefold, (b) threefold and (c) twofold symmetry axes. Sharp fundamental reflections accompanied by numerous well defined higher-order spots demonstrate a high degree of long-range quasiperiodic coherence in the bulk state. Compared with previously reported rapidly quenched ferromagnetic iQCs, the present patterns exhibit significantly enhanced coherence, directly confirming that annealing stabilizes long-range quasiperiodic order in bulk samples without rapid quenching. (d)–(f) The temperature dependence of M/H for (d) Au54Cu7.5Al12In12Gd14.5, (e) Au57.5Cu5.5Al10.5In12Tb14.5 and (f) Au57.5Cu5Al13In10Dy14.5 iQCs measured under zero-field-cooled (ZFC, grey) and field-cooled (FC, red) conditions. Clear divergences indicate ferromagnetic transitions. The insets show the inverse susceptibility H/M over the temperature range 1.8–300 K, revealing Curie–Weiss behaviour with positive Weiss temperatures. Fits to the Curie–Weiss law yield temperature-independent susceptibilities of χ0 = 1.18 (2) × 10−4, 2.31 (2) × 10−4 and 4.15 (3) × 10−4 cm3 mol−1 for the Gd-, Tb- and Dy-based iQCs, respectively. The images are reproduced with permission from Tamura et al. (2026View full citation), copyright (2026) The American Chemical Society.

IUCrJ
Volume 13| Part 5| September 2026| Pages 552-579
ISSN: 2052-2525
https://doi.org/10.1107/S2052252526006263