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Inorganic Chemistry Frontiers Vol - 4 Issue - 1

Inorganic Chemistry Frontiers Vol -3

Inorganic Chemistry Frontiers Vol -2

Inorganic Chemistry Frontiers Vol -1

Synthetically tuned structural variations in CePd_xGe_2−x (x = 0.21, 0.32, 0.69) towards diverse physical properties

Content Provider	Royal Society of Chemistry (RSC)
Author	Banerjee, Swastika Kalsi, Deepti Peter, Sebastian C. Joseph, Boby Silva, Ivan da Ghara, Somnath Pati, Swapan K. Sundaresan, A. Rayaprol, Sudhindra Halappa, Pramod Sarkar, Sumanta Mumbaraddi, Dundappa
Copyright Year	2017
Abstract	In this work, we have studied the structure and physical properties of a series of intermetallic compounds with the general formula CePdxGe2−x (where, x = 0.21, 0.32, 0.69). It was found that the compound crystallizes in three different phases with stoichiometries: CePd0.32Ge1.68, CePd0.21Ge1.79 and CePd0.69Ge1.31 by varying the Pd to Ge ratio. While CePd0.32Ge1.68 and CePd0.69Ge1.31 crystallize in the hexagonal AlB2 structure type with the space group P6/mmm, CePd0.21Ge1.79 crystallizes in the tetragonal α-ThSi2 structure type with the space group I41/amd. CePd0.69Ge1.31 is in fact an ordered superstructure of CePd0.32Ge1.68 with tripling of the c-lattice. Relative changes in the Pd/Ge ratio also impart substantial variation in their magnetic properties, although Ce is in the trivalent state in both the phases. CePd0.21Ge1.79 shows metamagnetic behavior below 10 K whereas CePd0.69Ge1.31 showed ferromagnetic behavior in the same temperature range. In addition to the metamagnetic behavior, CePd0.21Ge1.79 also shows spin glass behavior at low temperature. DFT calculations were used to obtain ulterior information on the CePd0.69Ge1.31 phase. Self-consistent calculations revealed that the ferromagnetic ordering of the ground state arises from the spins at the Ce and Pd sites. The observed sharp rise in the low temperature resistivity of CePd0.69Ge1.31 is an indication of a pseudo-gap formation or possible Kondo behavior in the electronic density of states, enhancing the scattering of the charge carriers. Heat capacity measurements on CePd0.69Ge1.31 suggest that it falls in the category of medium heavy fermion compounds.
Starting Page	241
Ending Page	255
Page Count	15
File Format	HTM / HTML PDF
ISSN	20521553
Volume Number	4
Issue Number	2
Journal	Inorganic Chemistry Frontiers
DOI	10.1039/c6qi00366d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ge Kondo Intermetallic Space group Tetragonal crystal system Advanced Micro Devices Ferromagnetism Spin glass Electrical resistivity and conductivity Electronic density Heat capacity Fermion
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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Synthetically tuned structural variations in CePdxGe2−x (x = 0.21, 0.32, 0.69) towards diverse physical properties

Synthetically tuned structural variations in CePd_xGe_2−x (x = 0.21, 0.32, 0.69) towards diverse physical properties