Thermodynamics of lanthanum and neodymium hexaborides
Heat-capacity measurements on massive zone-refined samples of lanthanum and neodymium hexaborides have provided further elucidation of the behavior of two important members of the magnetically concentrated lanthanide alloys with high metallic conductivity. Although NdB6 with its two 4f electrons on the Nd atom appears to be a well-behaved Curie-Weiss paramagnetic with a magnetic susceptibility of about 3 x 10-3 at 300 deg K, the true Curie-Weiss temperature appears to be well below 100 deg K. A cooperative lambda-type transition suggestive of ferro-or antiferro-magnetic ordering with a Neel temperature near 7.5 deg K was observed. Resolution of the excess heat capacity by using the lattice contributions of the isostructural lanthanum hexaboride indicates the presence of a complex Schottky transition with a maximum near 50 deg K presumably occasioned by crystalline field splitting.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Chemistry; Arthur D. Little, Inc., Cambridge, MA (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AT(11-1)-1149
- NSA Number:
- NSA-18-019928
- OSTI ID:
- 4015448
- Report Number(s):
- CONF-405-6
- Resource Relation:
- Conference: 4. rare earth research conference, Phoenix, AZ (United States), 22-25 Apr 1964; Other Information: From 4th Rare Earth Research Conference, Phoenix, Ariz., Apr. 1964. Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- United States
- Language:
- English
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