Superconducting T′-La_<2-x>Ce_xCuO_4 Films Grown by Molecular Beam Epitaxy

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概要

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• In this letter we report the synthesis of superconducting T′-La_<2-x>Ce_xCuO_4 on SrTiO_3(001)by molecular beam epitaxy. Although T′-La_<2-x>Ce_xCuO_4 with a very limited range of x can be prepared by bulk synthesis using rather complicated techniques, this compound is very easy to obtain by thin film synthesis. Crucial to our success was the use of SrTiO_3 substrates, which seems to stabilize the formation of the T′ structure by an epitaxial effect. The best T_c was 〜30K by onset and 〜28K by zero resistance, which was obtained for x=0.109. The resistivity showed a metallic temperature dependence, and the film's overall behavior was similar to that for the best(Nd, Ce)_2CuO_4 or(Pr, Ce)_2CuO_4 films. Moreover, the single phase of the T′ Structure formed for a composition range of 0.09<x<0.22, which is much wider than for previously reported bulk synthesis.

• 社団法人応用物理学会の論文
• 2000-06-01

著者

• NAITO Michio

  NTT Basic Research Laboratories

• Hepp Markus

  NTT Basic Research Laboratories

関連論文

• Anisotropic Resistivity of In-Plane-Aligned La_Sr_xCuO_4(100) Films on LaSrGaO_4(100) Substrates
• Low Microwave Surface Resistance in NdBa_2Cu_3O_ Films Grown by Molecular Beam Epitaxy
• New Superconducting Sr_2CuO_ Thin Films Prepared by Molecular Beam Epitaxy
• A New Superconducting Cuprate Prepared by Low-Temperature Thin-Film Synthesis in a Ba -Cu -O System
• New Superconducting PbSr_2CuO_ Prepared by a Novel Low-Temperature Synthetic Route Using Molecular Beam Epitaxy
• Superconducting T′-La_Ce_xCuO_4 Films Grown by Molecular Beam Epitaxy
• Anisotropic Resistivity of In-Plane-Aligned La 2-xSrxCuO 4(100) Films on LaSrGaO 4(100) Substrates

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