Abstract
Magnetic susceptibility (χ) has been measured for SmS alloyed with GdS, LaS and YS as a function of pressure (P) and of composition (x) of the dopant at 295 K. A sharp decrease in χ similar to that of SmS when going into the Intermediate Valent (I.V.) state is obtained, χ of Sm0.85Gd0.15S which retains the high pressure phase metastably has been measured at 1 atm for several temperatures below ambient. χ deviates from the simple additivity law for SmS and dopant when (x) is varied. This has been attributed to several mechanisms, among which conduction electron enhancement of Sm-Sm exchange interaction and an increase in valence due to alloying are the most important. A gradual increase in the valence of Sm with pressure is also observed. It is concluded that the amount of the Gd ion has no role in the transition to the I.V. state resulting from either pressure or alloying and that these two parameters are not equivalent for these alloys.
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© 1978 Plenum Press, New York
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Cordero-Montalvo, C., Vedam, K., Mulay, L.N. (1978). The Pressure Dependence of the Magnetic Susceptibility of Rare-Earth Substituted Samarium Sulfide. In: Chu, C.W., Woollam, J.A. (eds) High-Pressure and Low-Temperature Physics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-3351-7_12
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DOI: https://doi.org/10.1007/978-1-4684-3351-7_12
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