Evidence Of An Incommensurate Spin-Density Wave Instability In Single Crystal Bafe2as Detected By 75as NMR

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Physical Review Letters

OSTI ID:964945

Baek, Seung H ^[1]; Klimczuk, Tomasz W ^[1]; Ronning, Filip ^[1]; Bauer, Eric D ^[1]; Thompson, Joe D ^[1]; Curro, Nicholas J ^[2]

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1. Los Alamos National Laboratory
2. UC-DAVIS

We report a {sup 75}As NMR study of BaFe{sub 2}As{sub 2} in both single crystal and polycrystal forms. The temperature dependence of the {sup 75}As NMR spectra shows magnetic broadening associated with a spin-density-wave instability at 85 K for the single crystal and at 138 K for the polycrystal material. The nuclear spin-lattice relaxation rate T{sub 1}{sup -1} exhibits a sharp maximum at the transition and is independent of field orientation in the single crystal. Our study suggests that there is no significant difference in the physics of single crystal and polycrystal BaFe{sub 2}As{sub 2} even though some properties differ qualitatively.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 964945
• Report Number(s): LA-UR-08-04570; LA-UR-08-4570; PRLTAO; TRN: US0903543
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
INSTABILITY
MONOCRYSTALS
NMR SPECTRA
ORIENTATION
PHYSICS
POLYCRYSTALS
SPIN-LATTICE RELAXATION
TEMPERATURE DEPENDENCE