Antiferromagnetic Critical Fluctuations in BaFe$ 2$As$ 2$ - Condensed Matter > SuperconductivityReportar como inadecuado




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Abstract: Magnetic correlations near the magneto-structural phase transition in thebilayer iron pnictide parent compound, BaFe$ 2$As$ 2$, are measured. In closeproximity to the antiferromagnetic phase transition in BaFe$ 2$As$ 2$, acrossover to three dimensional critical behavior is anticipated and has beenpreliminarily observed. Here we report complementary measurements oftwo-dimensional magnetic fluctuations over a broad temperature range aboutT$ N$. The potential role of two-dimensional critical fluctuations in themagnetic phase behavior of BaFe$ 2$As$ 2$ and their evolution near theanticipated crossover to three dimensional critical behavior and long-rangeorder are discussed.



Autor: Stephen D. Wilson, Z. Yamani, C. R. Rotundu, B. Freelon, P. N. Valdivia, E. Bourret-Courchesne, J. W. Lynn, Songxue Chi, Tao Hong

Fuente: https://arxiv.org/







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