Y 0.8 Ca 0.2 Ba 2 Cu 3 O y samples with large range of oxygen content, have been systematically studied by means of positron annihilation technology, transport property measurements and X-ray diffraction. The positron lifetime parameters have a strong dependence on oxygen content y, and show evident
✦ LIBER ✦
Iron isotope effect on Tc in optimally-doped (Ba,K)Fe2As2 (Tc = 38 K) and SmFeAsO1−y (Tc = 54 K) superconductors
✍ Scribed by P.M. Shirage; K. Kihou; K. Miyazawa; C.H. Lee; H. Kito; Y. Yoshida; H. Eisaki; Y. Tanaka; A. Iyo
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 286 KB
- Volume
- 470
- Category
- Article
- ISSN
- 0921-4534
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Here we report the first-principle FLAPW-GGA calculations of the elastic properties of two related layered phases, namely, the ternary arsenide SrFe 2 As 2 and the quaternary oxyarsenide LaFeAsO -basic phases for the newly discovered ''1 2 2" and ''1 1 1 1" 38-55 K superconductors. The independent e