High-pressure synthesis and superconductivity of LaGe5 containing a tunnel germanium network

Physical Review B - Condensed Matter and Materials Physics Volume 67 Issue 9 Page 945011- published_at 2003-03-01
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Title ( eng )
High-pressure synthesis and superconductivity of LaGe5 containing a tunnel germanium network
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Source Title
Physical Review B - Condensed Matter and Materials Physics
Volume 67
Issue 9
Start Page 945011
Abstract
Superconducting LaGe5 was synthesized by the reaction of La and Ge mixtures under a pressure of 5 GPa at 1200°C. It crystallized in the orthorhombic space group Immm (No. 71) with a=4.0290(6), b =6.307(1), and c=9.978(2) Å, V=253.54(6) Å3, and Z=2. Single-crystal studies revealed that LaGe5 had a germanium network with tunnels running along the a axis, where La atoms are located. There are two crystallographically different Ge sites in the structure La[(Gel)4(Ge2)1]. The tunnel network is composed of folded sp3-Gel layers coupled by eight coordinated Ge2 atoms. Electrical resistivity and magnetic-susceptibility measurements showed that the compound was a type-II superconductor with a transition temperature of 7.0 K.
NDC
Physics [ 420 ]
Language
eng
Resource Type journal article
Publisher
American Physical Society
Date of Issued 2003-03-01
Rights
Copyright (c) 2003 American Physical Society
Publish Type Version of Record
Access Rights open access
Source Identifier
[NCID] AA11187113
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.67.094501
[DOI] http://dx.doi.org/10.1103/PhysRevB.67.094501