Eu2Ni3Si5: a new valence-fluctuation system

Patil, Sujata ; Nagarajan, R. ; Gupta, L. C. ; Godart, C. ; Vijayaraghavan, R. ; Padalia, B. D. (1988) Eu2Ni3Si5: a new valence-fluctuation system Physical Review B, 37 (13). pp. 7708-7711. ISSN 0163-1829

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In our search for new valence-fluctuating systems, we have synthesized for the first time the compound Eu2Ni3Si5. The powder x-ray-diffraction pattern shows that the compound forms in the orthorhombic U2Co3Si5-type structure. The value of the isomer shift of the 151Eu Mössbauer resonance (-2.8 mm/sec at 300 K) and its strong temperature dependence (-1.1 mm/sec at 4.8 K) clearly establish that the Eu ion in this system is in a valence-fluctuating state. The average valence varies from 2.6 at 300 K to 2.8 at 4.8 K. The valence-fluctuating nature is further confirmed by magnetic-susceptibility studies.

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ID Code:11335
Deposited On:09 Nov 2010 03:32
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