Small anisotropy, weak thermal fluctuations, and high field superconductivity in Co-doped iron pnictide Ba(Fe1-xCox)2As2
By A. Yamamoto, J. Jaroszynski, C. Tarantini, L. Balicas, J. Jiang, A. Gurevich, D. Larbalestier, R. Jin, A. Sefat, M. McGuire and 3 more. 2008
310 citations recorded by the source corpus.
We performed high-field magnetotransport and magnetization measurements on a single crystal of the 122-phase iron pnictide Ba(Fe1-xCox)2As2. Unlike the HTS cuprates and 1111-phase oxypnictides, Ba(Fe1-xCox)2As2 showed practically no broadening of the resistive transitions under magnetic fields up to 45 T. The mass anisotropy gamma = Hc2ab/Hc2c deduced from the slopes of the upper critical field dHc2ab/dT = 4.9T/K and dHc2c/dT = 2.5T/K decreases from ~2 near Tc, to ~1.5 at lower temperatures. We observed the irreversibility field close to Hc2, and a rather unusual symmetric volume pinning force curve Fp(H) suggestive of strong pinning nano-structure.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/ed31722fc44b1cf015153ac03b0623bbb7e5b2da
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In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Iron-based superconductors at high magnetic fields (2011, background): “This scenario is consistent with Hc2(T ) observed on Ba-122 for which H⊥ c2(T ) becomes nearly equal to H ‖ c2(T ) at T Tc [27, 28, 30].”