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arXiv 2001.047462020-01cond-mat.mes-hall

Collective magnetic dynamics in artificial spin ice probed by AC susceptibility

Merlin Pohlit, Giuseppe Muscas, Ioan-Augustin Chioar, Henry Stopfel, Agne Ciuciulkaite, Erik Östman, Spyridon D. Pappas, Aaron Stein, Björgvin Hjörvarsson, Petr… 展开作者

Merlin Pohlit, Giuseppe Muscas, Ioan-Augustin Chioar, Henry Stopfel, Agne Ciuciulkaite, Erik Östman, Spyridon D. Pappas, Aaron Stein, Björgvin Hjörvarsson, Petra E. Jönsson, Vassilios Kapaklis

备注：: 7 pages, 4 figures
发表信息：: Phys. Rev. B 101, 134404 (2020)
DOI：: 10.1103/PhysRevB.101.134404

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We report on the study of the thermal dynamics of square artificial spin ice, probed by means of temperature and frequency dependent AC susceptibility. Pronounced influence of the inter-island coupling strength was found on the frequency response of the samples. Through the subsequent analysis of the frequency- and coupling-dependent freezing temperatures, we discuss the phenomenological parameters obtained in the framework of Vogel-Fulcher-Tammann law in terms of the samples microscopic features. The high sensitivity and robust signal to noise ratio of AC susceptibility validates the latter as a promising and simple experimental technique for resolving the dynamics and temperature driven dynamics crossovers for the case of artificial spin ice.

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