THE MAGNETIC SUCEPTIBILITY OF FECL2.4H2O FROM 0.35 K TO 4.2 K,
Abstract
The magnetic susceptibility of FeCl2.4H2O in powder and single crystal form has been measured between 0.35 and 4.2 K by an audiofrequency mutual inductance technique. Temperatures below 2 K were achieved with a liquid He3 bath. These measurements show FeCl2.4H2O to be an antiferromagnet with TN 1 K. With the aid of crystallographic evidence, it has been found possible to fit the data in the paramagnetic region with a detailed picture of the lowest spin quintet of the Fe++ ion in a monoclinic crystalline field. The same level scheme describes adequately the measured specific heat of the salt in this region. The analysis performed for T > TN combined with the data for T < TN suggests that a four sub-lattice model may be necessary to interpret in detail the measurements in the ordered state. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 16, 1964
- Accession Number
- AD0439394
Entities
People
- J. T. Schriempf
- S. A. Friedberg
Organizations
- Carnegie Institute of Technology