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arXiv 2406.07628cond-mat.dis-nncond-mat.mes-hallcond-mat.soft
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自旋玻璃中老化与回春的相互作用

Interplay between aging and rejuvenation in spin glasses

J. Freedberg, D. L. Schlagel, R. L. Orbach, E. Dan Dahlberg

AI总结:

本研究测量了Cu₀.₉₂Mn₀.₀₈单晶自旋玻璃的老化特性,对比淬火与有限冷却速率两种方案的老化曲线,揭示了老化与回春的相互作用对定量比较的影响,明确回春是两类生长速率差异的成因。

摘要:

我们采用交流磁化率技术,在0.3–0.8 T_g的温度范围内测量了单晶自旋玻璃($\boldsymbol{\rm Cu_{0.92}Mn_{0.08}}$)的老化效应。研究中,我们将传统老化实验(或称“淬火”老化方案)与由有限冷却速率曲线构建的老化曲线进行了对比。通过比较两类老化曲线的自旋玻璃有序化生长速率,我们发现:若不深入理解老化与回春的相互作用,就无法对淬火方案与有限冷却速率方案的结果进行定量比较。我们进一步证明,现有数据表明两类生长速率之间存在差异的原因是回春效应,而非累积老化。

英文摘要:

Aging in a single crystal spin glass ($\mathrm{Cu}_{0.92}\mathrm{Mn}_{0.08}$) has been measured using ac susceptibility techniques over a temperature range of $0.3 - 0.8 \, T_g$. In these studies, traditional aging experiments (or ``quench'' aging protocols) are compared to aging curves constructed from finite-cooling-rate curves. By comparing the growth rates of spin glass order between the two types of aging curves, it is determined that quantitative comparisons between protocols which are taken by quenching and protocols using a finite cooling rate are not possible without a deeper understanding of the interplay between aging and rejuvenation. We then demonstrate that the data presented indicate that rejuvenation, rather than cumulative aging, is the cause for the discrepancies between the two growth rates.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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