Low-energy spin dynamics in the antiferromagnetic phase of CaFe 2As2

25Citations
Citations of this article
31Readers
Mendeley users who have this article in their library.

Abstract

We present 75As nuclear magnetic resonance data in the paramagnetic and magnetic states of single-crystal CaFe 2As 2. The electric field gradient and the internal magnetic field at the As sites change discontinuously below the first-order structural transition at T0 = 169 K. In the magnetic state, we find a single value of the internal hyperfine field consistent with commensurate antiferromagnetic order of Fe moments pointing in the ab plane. The spin lattice relaxation rate shows Korringa behavior for T ≤ T0/3, reflecting the metallic nature of the ordered state. Surprisingly, T1-1 exhibits a small peak at 10 K, revealing the presence of slow spin fluctuations that may be associated with domain wall motion.

Cite

CITATION STYLE

APA

Curro, N. J., Dioguardi, A. P., ApRoberts-Warren, N., Shockley, A. C., & Klavins, P. (2009). Low-energy spin dynamics in the antiferromagnetic phase of CaFe 2As2. New Journal of Physics, 11. https://doi.org/10.1088/1367-2630/11/7/075004

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free