Anisotropy of superconductivity of as-grown MgB₂ thin films by molecular beam epitaxy
Harada, Y. · Udsuka, M. · Nakanishi, Y. · Yoshizawa, M.
Original · EN
Superconducting thin films of magnesium diboride (MgB₂) were prepared on MgO (001) substrate by a molecular beam epitaxy (MBE) method with the co-evaporation conditions of low deposition rate in ultra-high vacuum. The structural and physical properties of the films were studied by RHEED, XRD, XPS, resistivity and magnetization measurements.All films demonstrated superconductivity without use of any post-annealing process.The highest Tc,onset determined by resistivity measurement was about 33K in the present samples.Anisotropic superconducting properties were evaluated by the resistivity and magnetic measurements.We will discuss the anisotropy of superconductivity for as-grown MgB₂ thin films.
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