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Field-pulse memory in a spin-glass
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Thermoremanent magnetization (time-dependent magnetization) of TbRuSn collected at  = 12 K with  = 3600 s under field-cooled conditions of  = 500 Oe. Data are fit to the equation ()=   +  * [−(/) (1 − )], where is the time-independent remanent magnetic contribution, is the glassy component of the magnetization, is time, is the characteristic time constant, and is the characteristic stretching-exponent. (b) Temperature-dependent AC susceptibility of TbRuSn 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.

Image of FIG. 2.
FIG. 2.

Crystal structure of TbRuSn 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.

Image of FIG. 3.
FIG. 3.

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.

Image of FIG. 4.
FIG. 4.

(a) Temperature-dependent magnetization of TbRuSn collected upon warming with temperature-specific field-pulses ( ) at 11, 9, 7, 5, and 3 K (black), the blank run ( ) without initial field-pulses (red), and (blue). (b) The derivative of 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  = 10 Oe

Image of FIG. 5.
FIG. 5.

Temperature-dependent magnetization ( ) of TbRuSn 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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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Field-pulse memory in a spin-glass