Growth and superconductivity of FeSex crystals
نویسندگان
چکیده
Iron selenide FeSex crystals with lateral dimensions up to millimeters were grown via a vapor self-transport method. The crystals consist of the dominant -phase with trace amounts of -phase as identified by powder x-ray diffraction. With four-probe resistance measurements, we obtained a zero resistance critical temperature of 7.5 K and a superconducting onset transition temperature of up to 11.8 K in zero magnetic field as well as an anisotropy of 1.5 0.1 for the critical field. Magnetization measurements on individual crystals reveal the coexistence of superconductivity and ferromagnetism. © 2009 American Institute of Physics. DOI: 10.1063/1.3093838
منابع مشابه
The synthesis, structural characterization and superconductivity of FeSex with 0.80≤ x≤1.20
We have performed a detailed study on the synthesis, the characterization of structural phases and superconductivity of the binary FeSex system from the Fe-rich phase into the Se-rich phase with 0.80≤ x ≤1.20. The results indicate that by long-time lowtemperature annealing, single phase sample could be obtained near the composition of FeSe0.95 with the tetragonal PbO-type structure, while impur...
متن کامل(Li1−xFex)OHFeSe Superconductors: Crystal Growth, Structure, and Electromagnetic Properties
This review focuses on the growth of high-quality (Li1−xFex)OHFeSe single crystals by a hydrothermal method using floating-zone-grown AxFe2−ySe2 (A = K, Rb, and Cs) as precursors. The structure, superconductivity, and magnetic behavior of the obtained crystals are highly influenced by the growth conditions, such as time, temperature, and composition. A phase diagram with temperature against the...
متن کاملGrowth and characterizations of Ba2Ti2Fe2As4O single crystals
Single crystals of a new iron-based superconductor Ba2Ti2Fe2As4O have been grown successfully via a Ba2As3-flux method in a sealed evacuated quartz tube. Bulk superconductivity with Tc ∼ 21.5 K was demonstrated in resistivity and magnetic susceptibility measurements after the as-grown crystals were annealed at 500 °C in vacuum for a week. X-ray diffraction patterns confirm that the annealed and...
متن کاملGrowth, Characterization and Physical Properties of High−Quality Large Single Crystals of Bi2(Sr2−xLax)CuO6+δ High Temperature Superconductors
High quality large Bi2(Sr2−xLax)CuO6+δ (La-Bi2201) single crystals have been successfully grown by the traveling solvent floating zone technique. The samples are characterized by compositional and structural analyzes and their physical properties are investigated by magnetic susceptibility and resistivity measurements. Superconducting samples with sharp superconducting transitions are obtained ...
متن کاملSuperconductivity in single crystals of LaFePO
Single crystals of the compound LaFePO were prepared using a flux growth technique at high temperatures. Electrical resistivity measurements reveal metallic behavior and a resistive transition to the superconducting state at a critical temperature Tc ∼ 6.6 K. Magnetization measurements also show the onset of superconductivity near 6 K. In contrast, specific heat measurements manifest no discont...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009