MAGNETIC ORDERING IN VF2.
Abstract
The compound VF2 was prepared by treatment of vanadium metal with HF gas at 1250C to form VF3, and subsequent reduction to VF2 at 1150C with a controlled mixture of HF and H2. Debye-Scherrer photographs show VF2 to have the rutile structure, isomorphic with MnF2, FeF2, CoF2, NiF2 and ZnF2. Heat capacity measurements from room temperature to 5K, using a platinum resistance thermometer, show a peak in heat capacity at 7.0K, presumably associated with long-range magnetic ordering, and a large magnetic contribution to the heat capacity at higher temperatures. The major fraction of the magnetic entropy of R 1n 4 is acquired in the short range order region. The behavior of the magnetic entropy is similar to that found in CuC12 and CrC12 where there is extensive short-range magnetic ordering in one-dimensional chains of metal atoms coupled by relatively strong exchange forces.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1965
- Accession Number
- AD0625211
Entities
People
- J. W. Stout
- W. O. J. Boo
Organizations
- University of Chicago