𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Inter- and intragrain AC response of the granular superconductors K3C60 and Rb3C60

✍ Scribed by M. Baenitz; M. Heinze; E. Straube; H. Werner; R. Schlögl; V. Thommen; H.-J. Güntherodt; K. Lüders

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
640 KB
Volume
228
Category
Article
ISSN
0921-4534

No coin nor oath required. For personal study only.

✦ Synopsis

In the present AC susceptibility study we report x(T) measurements of several granular fullerides as a function of temperature and applied alternating and static magnetic field. Clear experimental evidence for the existence of inter-and intragrain dissipation mechanisms in these compounds is found and the remarkable influence of the preparation conditions is demonstrated. The results are interpreted within the framework of Bean's critical state model and critical current densities are estimated. Effects due to the finite size of the crystallites (compared to the penetration depth) are also discussed in connection with the superconducting volume fraction. In order to investigate Bc2(T) of the single grains and of the coupling components, the x(T) curves are analyzed in external static magnetic fields. Be2(0) and the Ginzburg-Landau coherence length ~L are also evaluated by use of the WHH theory.

📜 SIMILAR VOLUMES

Alkali effects on the electronic states
Alkali effects on the electronic states of K3C60 and Rb3C60
✍ Katsumi Tanigaki; Mayumi Kosaka; Takahashi Manako; Yoshimi Kubo; Ichiro Hirosawa 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 550 KB

The electronic states in metallic alkali fullerides, K,C,, and Rb,C,, are studied in detail by cw-and pulsed-ESR. The ESR linewidth associated with conduction electrons varies substantially, depending sensitively on the alkali metals used. It is clearly revealed that the linewidth is homogeneous and

Electronic structure, electron-phonon in
Electronic structure, electron-phonon interaction and superconductivity in K3C60, Rb3C60 and Cs3C60
✍ D.L. Novikov; V.A. Gubanov; A.J. Freeman 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 745 KB

Results of electronic structure calculations of C6o and M3C6o (M = K, Rb, Cs) fcc crystals carried out by the full-potentiallinear muffin-tin orbital (LMTO) method are reported. Undoped C6o is found to be semiconductir~g wtt:z a direct gap between the fully occupied valence band and empty conduction