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(a) Thermoremanent magnetization (time-dependent magnetization) of Tb30Ru6.0Sn29.5 collected at T = 12 K with t w = 3600 s under field-cooled conditions of H = 500 Oe. Data are fit to the equation M(t)= M 0 + M trm*e [−(t/τ) (1 − n)], where M 0 is the time-independent remanent magnetic contribution, M trm is the glassy component of the magnetization, t is time, τ is the characteristic time constant, and n is the characteristic stretching-exponent. (b) Temperature-dependent AC susceptibility of Tb30Ru6.0Sn29.5 at 11 Hz (black) and 9311 Hz (purple) normalized to 11 Hz. The inset shows temperature-dependent AC susceptibility collected at frequencies, from left to right, of 11, 57, 579, 2311, and 9311 Hz.
Crystal structure of Tb30Ru6.0Sn29.5 with individual Tb (Tb1–Tb11) sites highlighted as different colored spheres. Sn and Ru sites are shown as large and small white spheres, respectively, with polyhedra representing polar Sn-centered sites surrounded by Tb atoms.
A graphical depiction of the temperature-dependent magnetization of (a) a typical memory-dip experiment and (b) the proposed field-pulse experiment. The red lines represent the background magnetization profile of the spin glass sample. The background is obtained by cooling in a small applied field and then measuring magnetization as the sample is warmed. The dashed lines represent the corresponding magnetization profiles when a wait time or field pulse is applied at temperature during the cool-down.
(a) Temperature-dependent magnetization of Tb30Ru6.0Sn29.5 collected upon warming with temperature-specific field-pulses (H p) at 11, 9, 7, 5, and 3 K (black), the blank run (M b) without initial field-pulses (red), and M p − M b (blue). (b) The derivative of M p − M b as a function of temperature showing slope minima at temperatures corresponding to the field-pulses. The warming and cooling ramp rates were fixed at 0.3 K/min, and the initial field was set to H i = 10 Oe
Temperature-dependent magnetization (M p − M b) of Tb30Ru6.0Sn29.5 with field pulses at 9 and 5 K with the sample held at 1.8 K for 120 s (red), 28 800 s (black), and 86 400 s (blue) prior to data collection upon warming. The warming and cooling ramp rates were fixed at 1 K/min.
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