首页>
中文期刊>
《中国物理：英文版》
>The effects of interstitial oxygen on superconducting electronic phases in strontium and oxygen co-doped La_(1.937) Sr_(0.063) CuO_(4+δ)
The effects of interstitial oxygen on superconducting electronic phases in strontium and oxygen co-doped La_(1.937) Sr_(0.063) CuO_(4+δ)
Strontium and oxygen co-doped La 1.937 Sr 0.063 CuO 4+δ superconductor with Tc≈40 K,which is obtained by oxidizing strontium-doped starting ceramic sample La 1.937 Sr 0.063 CuO 4 in NaClO solution,is annealed under different conditions to allow interstitial oxygen to redistribute. The evolution of the intrinsic superconducting property with the oxygen redistribution is studied in detail by magnetic measurements in various fields. It is found that there occurs the electronic phase separation from the single superconducting phase with Tc≈40 K into two coexisting superconducting states with values of T c:15 and 40 K or of 15 and 35 K in this system,depending on annealing condition. Our results indicate that the 15,35 and 40 K superconducting phases associated with the excess oxygen redistribution are all thermodynamically meta-stable intrinsic states in this Sr/O co-doped cuprate.
展开▼
机译：Effects of Nano Powder Synthesis Methods, Shaping and Sintering Conditions on Mierostructure and Oxygen Permeation of La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ) (LSCF) Perovskite-type Membranes
机译：ChemInform Abstract: Experimental Phase‐Diagram Study and Thermodynamic Optimization of the Silver—Strontium—Copper—Oxygen (Ag—Sr—Cu—O) and Silver—Calcium—Copper—Oxygen (Ag—Ca—Cu—O) Systems.
