Accession Number : AD0439394


Title :   THE MAGNETIC SUCEPTIBILITY OF FECL2.4H2O FROM 0.35 K TO 4.2 K,


Corporate Author : CARNEGIE INST OF TECH PITTSBURGH PA


Personal Author(s) : Schriempf,J T ; Friedberg,S A


Report Date : 16 Mar 1964


Pagination or Media Count : 26


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)


Descriptors :   *PERMEABILITY(MAGNETIC) , IRON COMPOUNDS , SINGLE CRYSTALS , ANTIFERROMAGNETISM , CHLORIDES , HYDRATES , GROUND STATE , CRYSTAL GROWTH , SOLUTIONS(MIXTURES) , SYMMETRY(CRYSTALLOGRAPHY) , CRYSTAL STRUCTURE , TEMPERATURE , NUCLEAR SPINS , INDUCTANCE , MEASUREMENT , AUDIO FREQUENCY , POWDERS


Distribution Statement : APPROVED FOR PUBLIC RELEASE