Journal
PHYSICAL REVIEW B
Volume 83, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.184504
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Funding
- US Department of Energy (DOE) [DE-AC02-98CH10886]
- Center for Emergent Superconductivity
- US DOE, Office for Basic Energy Science
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We report a study of the anisotropy in transport and magnetic properties of K0.64Fe1.44Se2.00 single crystals. The anisotropy in resistivity is up by one order of magnitude between 1.8 and 300 K. The magnetic susceptibility exhibits weak temperature dependence in the normal state with no significant anomalies with decreasing temperature. The lower critical fields H-c1 of K0.64Fe1.44Se2.00 are only about 3 Oe and the anisotropy of H-c1,(c)/H-c1,(ab) is about 1. The critical currents for H parallel to ab and H parallel to c are about 10-10(3) A/cm(2), which is smaller than in iron pnictides and in FeTe1-xSex, and nearly isotropic.
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