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Title: Mixed valence and metamagnetism in a metal flux grown compound Eu2Pt3Si5
Authors: Sarkar, Sumanta
Subbarao, Udumula
Joseph, Boby
Peter, Sebastian C.
Keywords: Inorganic & Nuclear Chemistry
Physical Chemistry
Crystal growth
Magnetic properties
Orthorhombic U2Co3Si5-Type Structure
Ordered Superstructure
Issue Date: 2015
Publisher: Academic Press Inc, Elsevier Science
Citation: Journal of Solid State Chemistry
Sarkar, S.; Subbarao, U.; Joseph, B.; Peter, S. C., Mixed valence and metamagnetism in a metal flux grown compound Eu2Pt3Si5. Journal of Solid State Chemistry 2015, 225, 181-186.
Abstract: A new compound Eu2Pt3Si5 with plate shaped morphology has been grown from excess In flux. The compound crystallizes in the orthorhombic U2CO3Si5 structure type, 1bam space group and the lattice parameters are a=10.007(2) angstrom, b=11.666(2) angstrom and c=6.0011(12) angstrom. The crystal structure of this compound can be conceived as inter-twinned chains of [Pt2Si2] and [PtSi3] tetrahedra connected along [100] direction to give rise to a complex three dimensional [Pt3Si5] network. Temperature dependent magnetic susceptibility data suggests that Eu2Pt3Si5 undergoes a strong antiferromagnetic ordering (T-N=19 K) followed by a weak ferromagnetic transition (T-C=5.5 K). The effective magnetic moment/Eu obtained from susceptibility data is 6.78 mu B accounts mixed valent Eu with almost 85% divalent Eu, which is supported by X-ray absorption near edge spectroscopy. The compound undergoes a metamagnetic transition under applied magnetic field through a probable spin flop mechanism. (C) 2015 Elsevier Inc. All rights reserved.
Description: Restricted access
ISSN: 0022-4596
Appears in Collections:Research Papers (Sebastian C. Peter)

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