Dehybridizaton of the 4f shell in Si-substituted CeRh3B2

Malik, S. K. ; Shenoy, G. K. ; Dhar, S. K. ; Paulose, P. L. ; Vijayaraghavan, R. (1986) Dehybridizaton of the 4f shell in Si-substituted CeRh3B2 Physical Review B: Condensed Matter and Materials Physics, 34 (11). pp. 8196-8198. ISSN 1098-0121

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The compound CeRh3B2 is known to order magnetically with an unusually high Curie temperature (TC) of 115 K and a low saturation moment of about 0.4μB. We have studied the magnetic behavior of the system CeRh3(B1−xSix)2(0≤x≤0.5). It is observed that on partial replacement of B by Si an anisotropic lattice expansion takes place and the magnetic moment per Ce ion increases to more than 0.8μB but at the same time TC shows a remarkable decrease by an order of magnitude to 16 K for CeRh3BSi. These results suggest that the anomalous behavior of CeRh3B2 arises because of the Ce 4f hybridization with the neighboring ligands.

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