Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2050
Title: Eu3Ir2In15: A Mixed-Valent and Vacancy-Filled Variant of the Sc5Co4Si10 Structure Type with Anomalous Magnetic Properties
Authors: Sarkar, Sumanta
Baneijee, Swastika
Jana, Rajkumar
Siva, Ramesh
Pati, Swapan Kumar
Balasubramanian, Mahalingam
Peter, Sebastian C.
Keywords: Inorganic & Nuclear Chemistry
Crystal-Structure
Indium Flux
Compound
Transition
Behavior
Yb14Mn1-XAlxSb11
Superstructure
Metamagnetism
Efficiency
Family
Issue Date: 2015
Publisher: American Chemical Society
Citation: Inorganic Chemistry
54
22
Sarkar, S.; Baneijee, S.; Jana, R.; Siva, R.; Pati, S. K.; Balasubramanian, M.; Peter, S. C., Eu3Ir2In15: A Mixed-Valent and Vacancy-Filled Variant of the Sc5Co4Si10 Structure Type with Anomalous Magnetic Properties. Inorg. Chem. 2015, 54 (22), 10855-10864.
Abstract: A new compound, Eu3Ir2In15, has been synthesized using indium as an active metal flux. The compound crystallizes in the tetragonal P4/mbm space group with lattice parameters a = 14.8580(4) angstrom, b = 14.8580(4) angstrom, and c = 4.3901(2) angstrom. It was further characterized by SEM-EDX studies. The effective magnetic moment (mu(eff)) of this compound is 7.35 mu(B)/Eu ion with a paramagnetic Curie temperature (theta(p)) of - 28 K, suggesting antiferromagnetic interaction. The mixed-valent nature of Eu observed in magnetic measurements was confirmed by XANES measurements. The compound undergoes demagnetization at a low magnetic field (10 Oe), which is quite unusual for Eu-based intermetallic compounds. Temperature-dependent resistivity studies reveal that the compound is metallic in nature. A comparative study was made between Eu3Ir2In15 and hypothetical vacancy-variant Eu5Ir4In10, which also crystallizes in the same crystal structure. However, our computational studies along with control experiments suggest that the latter is thermodynamically less feasible compared to the former, and hence we propose that it is highly unlikely that an RE5T4X10 would exist with X as a group 13 element.
Description: Restricted access
URI: http://hdl.handle.net/10572/2050
ISSN: 0020-1669
Appears in Collections:Research Articles (Swapan Kumar Pati)

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