Inscriere cercetatori

Site nou !

Daca nu va puteti recupera parola (sau aveti alte probleme), scrieti-ne la pagina de contact. Situl vechi se gaseste la adresa old.ad-astra.ro

Facebook

Antiferromagnetic critical fluctuations in BaFe2As2

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

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

Editorial: APS, Physical Review B, 82, p.144502, 2010.

Rezumat:

Magnetic correlations near the magnetostructural phase transition in the bilayer iron-pnictide parent compound, BaFe2As2, are measured. In close proximity to the antiferromagnetic phase transition in BaFe2As2, 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 TN. The potential role of two-dimensional critical fluctuations in the magnetic phase behavior of BaFe2As2 and their evolution near the anticipated crossover to three-dimensional critical behavior and long-range order are discussed.

Cuvinte cheie: BaFe2As2

URL: http://prb.aps.org/abstract/PRB/v82/i14/e144502