Antiferromagnetic Critical Fluctuations in BaFe$_2$As$_2$

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

doi:10.1103/PhysRevB.82.144502

Antiferromagnetic Critical Fluctuations in BaFe$_2$As$_2$

Superconductivity 2015-05-19 v1 Strongly Correlated Electrons

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

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Abstract

Magnetic correlations near the magneto-structural phase transition in the bilayer iron pnictide parent compound, BaFe $_2$ As $_2$ , are measured. In close proximity to the antiferromagnetic phase transition in BaFe $_2$ As $_2$ , a crossover to three dimensional critical behavior is anticipated and has been preliminarily observed. Here we report complementary measurements of two-dimensional magnetic fluctuations over a broad temperature range about T $_N$ . The potential role of two-dimensional critical fluctuations in the magnetic phase behavior of BaFe $_2$ As $_2$ and their evolution near the anticipated crossover to three dimensional critical behavior and long-range order are discussed.

Keywords

magnetic phase transitions magnetic structure magnetocaloric effect

Cite

@article{arxiv.1009.2116,
  title  = {Antiferromagnetic Critical Fluctuations in BaFe$_2$As$_2$},
  author = {Stephen D. Wilson and Z. Yamani and C. R. Rotundu and B. Freelon and P. N. Valdivia and E. Bourret-Courchesne and J. W. Lynn and Songxue Chi and Tao Hong and R. J. Birgeneau},
  journal= {arXiv preprint arXiv:1009.2116},
  year   = {2015}
}

Comments

6 pages, 4 figures; Accepted for publication in Physical Review B

Antiferromagnetic Critical Fluctuations in BaFe$_2$As$_2$

Abstract

Keywords

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