期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 77, 期 11, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.77.114709
关键词
BaFe2As2; NMR; itinerant antiferromagnetism; ternary iron arsenide
We report results of As-75 nuclear magnetic resonance (NMR) experiments on a self-flux grown single crystal of BaFe2As2. A first-order antiferromagnetic (AF) transition near 135 K was detected by the splitting of NMR lines, which is accompanied by simultaneous structural transition as evidenced by a sudden large change of the electric field gradient tensor at the As site. The NMR results lead almost uniquely to the stripe spin structure in the AF phase. The data of spin-lattice relaxation rate indicate development of anisotropic spin fluctuations of the stripe-type with decreasing, temperature in the paramagentic phase.
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