The thermodynamic and physical properties (crystal structure, thermal expansion, magnetic properties and heat content)of YbPdIn and MPdIn ( M = Ca, Sr, Er, Eu) were measured over a wide temperature range (100-1000K) in order to expalin the anomalous behaviour of YbPdIn. The obtained results led to the determination of three previously unknown compounds (CaPdIn, SrPdIn and EuPdIn) which crystallise with the TiNiSi type structure. The anomalous behaviour of YbPdIb was found to depend on the instability of the valence which shows an almost regular change from divalency to trivalency with increasing temperature. An approximate determination of the energy required in this electronic process is also presented.
THERMODYNAMIC AND PHYSICAL-PROPERTIES OF MIXED-VALENCE YBPDIN AND OF CAPDIN, SRPDIN, ERPDIN, EUPDIN INTERMETALLIC COMPOUNDS
CANEPA, FABIO MICHELE
1985-01-01
Abstract
The thermodynamic and physical properties (crystal structure, thermal expansion, magnetic properties and heat content)of YbPdIn and MPdIn ( M = Ca, Sr, Er, Eu) were measured over a wide temperature range (100-1000K) in order to expalin the anomalous behaviour of YbPdIn. The obtained results led to the determination of three previously unknown compounds (CaPdIn, SrPdIn and EuPdIn) which crystallise with the TiNiSi type structure. The anomalous behaviour of YbPdIb was found to depend on the instability of the valence which shows an almost regular change from divalency to trivalency with increasing temperature. An approximate determination of the energy required in this electronic process is also presented.
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