Kumar, Shiva and Mudgel, Monika and Dogra, Anjana and Husain, M. and Awana, V. P. S. and Kishan, Hari (2009) Synthesis and structural details of MSr2RECu2O7+δ(M-1212;0δ<1) compounds with M = Al, Nb, Fe, Ru, Ga & Co and RE = Eu, Y. Physica C: Superconductivity, 470 (1). S213-S214. ISSN 0921-4534

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Abstract

Synthesis and structural details of MSr2RECu2Oz (M-1212) compounds with M = Ga, Nb, Fe, Al and Co) and RE = Eu, Y are reported. Reitveld refinement of X-ray diffraction (XRD) patterns shows that all compounds are crystallized in single phase. Nb-, Fe- and Al-1212 possess tetragonal P4/mmm space group structure while the Ga-1212 and Co-1212 are crystallized in orthorhombic Ima2 space group. The change of space group from P4/mmm to Ima2 indicating towards the doubling of unit cell. The buckling angle [Cu(2)–O(2)–Cu(2) angle] shows that most of the studied samples are heavily under doped and hence they could not exhibit superconductivity. Thermogravimetric (TGA) analysis shows the M-1212 compounds to be more stable than widely studied 90 K superconductor Cu-1212 (RE-123).

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	X-ray diffraction; M1212; TGA
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	18 Jul 2012 07:01
Last Modified:	18 Jul 2012 07:01
URI:	http://npl.csircentral.net/id/eprint/357

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