THE HEAT CAPACITIES OF SEVEN RARE-EARTH ETHYLSULPHATES AT LOW TEMPERATURES

Journal Article · Sun Mar 01 04:00:00 EST 1959 · Phys. and Chem. Solids

DOI:https://doi.org/10.1016/0022-3697(59)90105-2· OSTI ID:4221396

Meyer, H; Smith, P L

Heat-capacity measurements on the ethyl sulfates of lanthanum, ceriura, praseodymium, neodymium, dysprosium, ytterbium, and yttrium between 1.4 and 20 deg K are described. In addition, specific heat results for the cerium salt between 0.6 and 1.2 deg K are presented. For the salts of lanthanum and yttrium, the specific heat is entirely due to lattice vibrations, while for those of neodymium and ytterbium, there is a small contribution from magnetic interaction negligible above 2 deg K. For the salts of cerium praseodymium and dysprosium, a Schottky anomaly indicating the presence of excited electronic energy levels was found, and it was possible to determine the position of these levels with accuracy. The maximum of the Schottky anomaly of cerium and praseodymium ethyl sulfates was found to be somewhat larger than the one calculated from statistical mechanics, and this specific heat excess is discussed. (auth)

• Research Organization: Oxford Univ.
• NSA Number: NSA-13-020941
• OSTI ID: 4221396
• Journal Information: Phys. and Chem. Solids, Journal Name: Phys. and Chem. Solids Vol. Vol: 9
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CERIUM SULFATES
CHEMISTRY
DYSPROSIUM SULFATES
ENERGY LEVELS
ETHYL RADICALS
LANTHANUM SULFATES
LATTICES
LOW TEMPERATURE
MAGNETIC FIELDS
MAGNETIC MOMENTS
MATHEMATICS
MEASURED VALUES
NEODYMIUM SULFATES
OSCILLATIONS
PRASEODYMIUM SULFATES
RARE EARTHS
SALTS
SCHOTTKY EFFECT
SPECIFIC HEAT
STATISTICS
SULFATES
THERMODYNAMICS
YTTERBIUM SULFATES
YTTRIUM SULFATES