Study of Mixed Valent Alloys Sm<Subscript>1−x</Subscript> Sc<Subscript>X</Subscript>S by X-Ray Absorption Technique: Fid-Bau Portal

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Study of Mixed Valent Alloys Sm1−x ScXS by X-Ray Absorption Technique

Singhal, Rishi K. / Rao, K. V. R. / Jerath, Kavita S. / Chauhan, H. S. / Jain, D. C. / Chandra, Usha / Garg, K. B.

Abstract Sm in SmS is divalent and the compound is a black-coloured Semiconductor. Measurements of its lattice parameter (1), magnetic susceptibility (2) and L111 X-ray absorption measurements (3) suggest that its cationic valence goes abruptly from about 2 to 2.7 on applying a pressure of 6.5 Kbar at 295 K — revealing first order phase transition to intermediate valence. The pressure-induced electronic transition in SmS can also be induced by substituting a trivalent rare earth ion in the SmS lattice (4). SmS exhibits a discontinuous transition in the valence of Sm as the yttrium concentration is increased (5). Similar effects have been observed for Sm1−x GdXS (6) anc SmS1−xOX (7). Alloys SmS of with LaS, on the other hand, exhibit a continuous Sm valence transition as the Lanthanum concentration is increased (8).

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Study of Mixed Valent Alloys Sm1−x ScXS by X-Ray Absorption Technique

Singhal, Rishi K. / Rao, K. V. R. / Jerath, Kavita S. / Chauhan, H. S. / Jain, D. C. / Chandra, Usha / Garg, K. B.

Abstract Sm in SmS is divalent and the compound is a black-coloured Semiconductor. Measurements of its lattice parameter (1), magnetic susceptibility (2) and L111 X-ray absorption measurements (3) suggest that its cationic valence goes abruptly from about 2 to 2.7 on applying a pressure of 6.5 Kbar at 295 K — revealing first order phase transition to intermediate valence. The pressure-induced electronic transition in SmS can also be induced by substituting a trivalent rare earth ion in the SmS lattice (4). SmS exhibits a discontinuous transition in the valence of Sm as the yttrium concentration is increased (5). Similar effects have been observed for Sm1−x GdXS (6) anc SmS1−xOX (7). Alloys SmS of with LaS, on the other hand, exhibit a continuous Sm valence transition as the Lanthanum concentration is increased (8).

Study of Mixed Valent Alloys Sm1−x ScXS by X-Ray Absorption Technique

Singhal, Rishi K. / Rao, K. V. R. / Jerath, Kavita S. / Chauhan, H. S. / Jain, D. C. / Chandra, Usha / Garg, K. B.

Abstract Sm in SmS is divalent and the compound is a black-coloured Semiconductor. Measurements of its lattice parameter (1), magnetic susceptibility (2) and L111 X-ray absorption measurements (3) suggest that its cationic valence goes abruptly from about 2 to 2.7 on applying a pressure of 6.5 Kbar at 295 K — revealing first order phase transition to intermediate valence. The pressure-induced electronic transition in SmS can also be induced by substituting a trivalent rare earth ion in the SmS lattice (4). SmS exhibits a discontinuous transition in the valence of Sm as the yttrium concentration is increased (5). Similar effects have been observed for Sm1−x GdXS (6) anc SmS1−xOX (7). Alloys SmS of with LaS, on the other hand, exhibit a continuous Sm valence transition as the Lanthanum concentration is increased (8).

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Title:

Study of Mixed Valent Alloys Sm1−x ScXS by X-Ray Absorption Technique

Contributors:

Singhal, Rishi K. (author) / Rao, K. V. R. (author) / Jerath, Kavita S. (author) / Chauhan, H. S. (author) / Jain, D. C. (author) / Chandra, Usha (author) / Garg, K. B. (author)

Published in:

Theoretical and Experimental Aspects of Valence Fluctuations and Heavy Fermions ; 659-662

Publication date:

1987-01-01

Size:

4 pages

ISBN:

978-1-4612-8259-4 , 978-1-4613-0947-5

DOI:

https://doi.org/10.1007/978-1-4613-0947-5_114

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Order Phase Transition , Neighbour Distance , Discontinuous Transition , Cationic Valence , Intermediate Valence Physics , Optics and Electrodynamics , Characterization and Evaluation of Materials

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