Phys. Rev. Lett. 87, 077003 (2001) [4 pages]Superconductivity of Ternary Silicide with the AlB2-Type Structure Sr(Ga0.37,Si0.63)2Received 27 February 2001; published 27 July 2001 A ternary silicide Sr(Ga0.37,Si0.63)2 was synthesized by a floating zone method. Electron diffraction and powder x-ray diffraction measurements indicate that the silicide has the AlB2-type structure with the lattice constants of a = 4.1427(6) Å and c = 4.7998(9) Å, where Si and Ga atoms are arranged in a chemically disordered honeycomb lattice and Sr atoms are inercalated between them. The silicide is isostructural with the high-temperature superconductor MgB2 reported recently. Electrical resistivity and dc magnetization measurements revealed that it is a type-II superconductor with onset temperature of 3.5 K. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.077003
DOI:
10.1103/PhysRevLett.87.077003
PACS:
74.10.+v, 61.66.Fn, 74.70.Dd
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.