Field-pulse memory in a spin-glass

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We report a magnetic field-pulse memory effect in the temperature-dependent magnetization of Tb30Ru6.0Sn29.5, a spin-glass material having a newly identified structure type. Tb30Ru 6.0Sn29.5 exhibits a glassy magnetization component of ∼2290 emu/mol-Tb, which represents over 84% of its total saturation magnetization. We show that when a magnetic field pulse of a few hundred gauss is applied to the sample as it is cooling, the system retains a memory of the temperature at which the pulse was applied. Upon warming, the imprinted memory is observed as a precipitous drop in magnetization at the pulse temperature. © 2013 AIP Publishing LLC.

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Applied Physics Letters

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