The Low Temperature Heat Capacity of Ni(CH3COO)2:4H20

The heat capacity of Ni(CH3COO)2:4H2O has been measured between 0.43 and 10.73K revealing a Schottky anomaly. An octahedral crystal field with axial and rhombic distortions plus spin-orbit interaction split the triplet ground state completely, the upper components lying 3.52K and 8.06K above the low...

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Bibliographic Details
Main Authors: Polgar,L. G, Friedberg,S. A
Format: Report
Language:English
Subjects:
ACETATES
CRYOGENICS
CRYSTAL DEFECTS
HYDRATES
LIGAND FIELDS
MAGNETIC PROPERTIES
MOLECULAR ENERGY LEVELS
MOLECULAR FIELD THEORY
NICKEL COMPOUNDS
NICKEL(II) IONS
Solid State Physics
SPECIFIC HEAT
SPIN ORBIT INTERACTIONS
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Summary:The heat capacity of Ni(CH3COO)2:4H2O has been measured between 0.43 and 10.73K revealing a Schottky anomaly. An octahedral crystal field with axial and rhombic distortions plus spin-orbit interaction split the triplet ground state completely, the upper components lying 3.52K and 8.06K above the lowest. The lattice contribution to C(p) is estimated. Comparison of the ground state splittings with those inferred from magnetic susceptibility data suggests the presence of a small interaction between Ni(++) ions. This is described by an antiferromagnetic molecular field coefficient A/k=+0.08K which may be largely of dipolar origin. (Author)